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Current Pharmaceutical Biotechnology

Editor-in-Chief

ISSN (Print): 1389-2010
ISSN (Online): 1873-4316

Research Article

In Silico Investigation of Signal Peptide Sequences to Enhance Secretion of CD44 Nanobodies Expressed in Escherichia coli

Author(s): Soudabeh Kavousipour, Shiva Mohammadi, Ebrahim Eftekhar, Mahdi Barazesh* and Mohammad H. Morowvat

Volume 22, Issue 9, 2021

Published on: 12 October, 2020

Page: [1192 - 1205] Pages: 14

DOI: 10.2174/1389201021666201012162904

Price: $65

Abstract

Background: The selection of a suitable signal peptide that can direct recombinant proteins from the cytoplasm to the extracellular space is an important criterion affecting the production of recombinant proteins in Escherichia coli, a widely used host. Nanobodies are currently attracting the attention of scientists as antibody alternatives due to their specific properties and feasibility of production in E. coli.

Objective: CD44 nanobodies constitute a potent therapeutic agent that can block CD44/HA interaction in cancer and inflammatory diseases. This molecule may also function as a drug against cancer cells and has been produced previously in E. coli without a signal peptide sequence. The goal of this project was to find a suitable signal peptide to direct CD44 nanobody extracellular secretion in E. coli that will potentially lead to optimization of experimental methods and facilitate downstream steps such as purification.

Methods: We analyzed 40 E. coli derived signal peptides retrieved from the Signal Peptide database and selected the best candidate signal peptides according to relevant criteria including signal peptide probability, stability, and physicochemical features, which were evaluated using signalP software version 4.1 and the ProtParam tool, respectively.

Results: In this in silico study, suitable candidate signal peptide(s) for CD44 nanobody secretory expression were identified. CSGA, TRBC, YTFQ, NIKA, and DGAL were selected as appropriate signal peptides with acceptable D-scores, and appropriate physicochemical and structural properties. Following further analysis, TRBC was selected as the best signal peptide to direct CD44 nanobody expression to the extracellular space of E. coli.

Conclusion: The selected signal peptide, TRBC is the most suitable to promote high-level secretory production of CD44 nanobodies in E. coli and potentially will be useful for scaling up CD44 nanobody production in experimental research as well as in other CD44 nanobody applications. However, experimental work is needed to confirm the data.

Keywords: CD44, E. coli, in silico cloning, physicochemical properties, secretory production, SignalP software.

Graphical Abstract

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    • SELECT at.type_name, p.copyright, p.publisher_location,m.month,y.year, a.publish_on, a.nid article_nid,a.article_id, a.pmid, a.issue_id, a.title, a.abstract,a.podcast,a.altmetric_score,a.altmetric_url,a.kudos_url, a.page_count, a.first_page, a.elocator, a.last_page, i.publication_date, a.file_name, a.file_path, a.doi, a.is_epub,a.epub_type, a.volume_id, a.is_uploaded, a.editor_choice, a.is_epub, j.image_file_name, a.article_no, a.art_type AS article_type, a.supplementary_filename,a.html_filename,a.prc_filename,a.epub_filename, a.graph_abs_lg_filename, a.graph_abs_sm_filename, a.oa_image_lg_filename, a.oa_image_sm_filename, j.journal_banner,a.animated_abstract,a.erratum_in,a.erratum_for, (CASE WHEN a.issue_id =0 THEN j.epub_price ELSE j.price END) AS sell_price, j.epub_price, j.nid AS jour_nid, j.title AS journal_title, j.issn, j.eissn,j.journal_id, j.subtitle AS jour_subtitle, v.volume_id,v.volume_name AS volume, v.year_id, i.title AS issue, i.month_id ,i.type issue_type, j.subtitle,j.formerly_title, ac.subtitle AS epub_title,a.crossmark_enabled,a.text_mining_urls,a.license_urls,a.created, a.receivedate, a.revisedate, a.acceptdate,js.js_title FROM article a LEFT JOIN article_section ac ON a.is_epub = ac.art_sec_id LEFT JOIN journal_section js ON a.js_id = js.js_id LEFT JOIN article_type at ON a.art_type = at.art_type_id LEFT JOIN issue i ON a.issue_id = i.issue_id LEFT JOIN month m ON m.id = i.month_id LEFT JOIN volume v ON v.volume_id = a.volume_id INNER JOIN year y ON y.id = v.year_id INNER JOIN journal j ON j.journal_id = a.journal_id INNER JOIN publisher p ON p.publisher_id = j.publisher_id WHERE a.article_id=110603
      750μsalphaeurekaselec_live_10_06_2022Article.php#408
      Backtrace
      • 11. app/Models/Article.php:408
      • 12. app/Http/Controllers/ArticleController.php:2515
      • 13. app/Http/Controllers/ArticleController.php:2035
      • 14. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 15. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select * from `journal` where `journal_id` = 30 limit 1
      800μsalphaeurekaselec_live_10_06_2022Journal.php#64
      Bindings
      • 0: 30
      Backtrace
      • 14. app/Models/Journal.php:64
      • 15. app/Http/Controllers/ArticleController.php:2516
      • 16. app/Http/Controllers/ArticleController.php:2035
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select count(*) as aggregate from (select j.nid as journal_nid,j.flyer_link,j.title ,j.issn,j.eissn,j.keyword, j.journal_id as journal_id, j.subtitle, j.image_file_name,j.description,j.journal_insight_url,j.doi from `subject_journal` as `sj` inner join `journal` as `j` on `j`.`journal_id` = `sj`.`journal_id` where j.journal_status=1 and subject_id IN (SELECT subject_id FROM subject_journal WHERE journal_id=30) and sj.journal_id!=30 group by `j`.`nid`) as `aggregate_table`
      1.03msalphaeurekaselec_live_10_06_2022Subject.php#200
      Backtrace
      • 16. app/Models/Subject.php:200
      • 17. app/Http/Controllers/ArticleController.php:2517
      • 18. app/Http/Controllers/ArticleController.php:2035
      • 19. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 20. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select j.nid as journal_nid,j.flyer_link,j.title ,j.issn,j.eissn,j.keyword, j.journal_id as journal_id, j.subtitle, j.image_file_name,j.description,j.journal_insight_url,j.doi from `subject_journal` as `sj` inner join `journal` as `j` on `j`.`journal_id` = `sj`.`journal_id` where j.journal_status=1 and subject_id IN (SELECT subject_id FROM subject_journal WHERE journal_id=30) and sj.journal_id!=30 group by `j`.`nid` order by `j`.`journal_id` asc limit 10 offset 0
      840μsalphaeurekaselec_live_10_06_2022Subject.php#200
      Backtrace
      • 14. app/Models/Subject.php:200
      • 15. app/Http/Controllers/ArticleController.php:2517
      • 16. app/Http/Controllers/ArticleController.php:2035
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select count(*) as aggregate from (select v.nid as volume_id,e.nid,e.title,v.issn,v.eissn,v.isbn,v.eisbn,e.ebook_id, v.image_file_name,v.file_path,v.flyer_link,v.ebook_volume_id, v.volume_name,v.doi,v.year_id,v.introduction from `subject_ebook` as `se` inner join `ebook` as `e` on `e`.`ebook_id` = `se`.`ebook_id` inner join `ebook_volume` as `v` on `v`.`ebook_id` = `se`.`ebook_id` inner join `year` as `y` on `y`.`id` = `v`.`year_id` where subject_id IN (SELECT subject_id FROM subject_journal WHERE journal_id=30) and v.ebook_status='1' and y.year > 2020 group by `v`.`nid`) as `aggregate_table`
      1.45msalphaeurekaselec_live_10_06_2022Subject.php#220
      Backtrace
      • 16. app/Models/Subject.php:220
      • 17. app/Http/Controllers/ArticleController.php:2518
      • 18. app/Http/Controllers/ArticleController.php:2035
      • 19. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 20. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select v.nid as volume_id,e.nid,e.title,v.issn,v.eissn,v.isbn,v.eisbn,e.ebook_id, v.image_file_name,v.file_path,v.flyer_link,v.ebook_volume_id, v.volume_name,v.doi,v.year_id,v.introduction from `subject_ebook` as `se` inner join `ebook` as `e` on `e`.`ebook_id` = `se`.`ebook_id` inner join `ebook_volume` as `v` on `v`.`ebook_id` = `se`.`ebook_id` inner join `year` as `y` on `y`.`id` = `v`.`year_id` where subject_id IN (SELECT subject_id FROM subject_journal WHERE journal_id=30) and v.ebook_status='1' and y.year > 2020 group by `v`.`nid` order by `v`.`ebook_volume_id` desc limit 10 offset 0
      1.29msalphaeurekaselec_live_10_06_2022Subject.php#220
      Backtrace
      • 14. app/Models/Subject.php:220
      • 15. app/Http/Controllers/ArticleController.php:2518
      • 16. app/Http/Controllers/ArticleController.php:2035
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select * from `keywords` where `article_id` = '110603'
      880μsalphaeurekaselec_live_10_06_2022Keywords.php#43
      Bindings
      • 0: 110603
      Backtrace
      • 13. app/Models/Keywords.php:43
      • 14. app/Http/Controllers/ArticleController.php:2519
      • 15. app/Http/Controllers/ArticleController.php:2035
      • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select * from `article_citation` where `article_id` = '110603'
      1.77msalphaeurekaselec_live_10_06_2022Article.php#1570
      Bindings
      • 0: 110603
      Backtrace
      • 13. app/Models/Article.php:1570
      • 14. app/Http/Controllers/ArticleController.php:2520
      • 15. app/Http/Controllers/ArticleController.php:2035
      • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select CONCAT_WS(' ',au.first_name, ' ', ifnull(au.initials,''), ' ', au.last_name) as authors, CONCAT(au.last_name, IFNULL(CONCAT(' ', au.initials), ''), ' ', au.first_name) AS authorsRIS, CONCAT_WS(' ',au.last_name, ' ', ifnull(au.initials,''), ' ', au.first_name) as authorsCiteAs, CONCAT_WS(' ',au.first_name, IFNULL(CONCAT(' ', au.initials), ''), IFNULL(CONCAT(' ', au.last_name), '')) as authorsmodal , `au`.*, `af`.`ror_id`, `af`.`institution`, `af`.`department`, `af`.`country`, `af`.`city`, `af`.`address`, (GROUP_CONCAT(TRIM(BOTH ', ' FROM CONCAT(ifnull(concat(af.institution,','),''), ifnull(concat(af.department,','),''), ifnull(concat(af.address,','),''), ifnull(concat(af.city,','),''), ifnull(concat(af.country,','),''), ifnull(concat(af.postal_code,','),''), ifnull(concat(af.phone,','),''), ifnull(concat(af.fax,','),''))) SEPARATOR '|')) as `author_affiliation`, (GROUP_CONCAT(TRIM(BOTH ', ' FROM CONCAT(ifnull(concat(af.web_view,','),''))) SEPARATOR '|')) as `web_view` from `author` as `au` left join `author_affiliation` as `af` on `au`.`author_id` = `af`.`author_id` where `au`.`article_id` = '110603' group by `au`.`author_id` order by `au`.`article_id` asc, `au`.`sequence` asc
      1.64msalphaeurekaselec_live_10_06_2022Author.php#86
      Bindings
      • 0: 110603
      Backtrace
      • 13. app/Models/Author.php:86
      • 14. app/Http/Controllers/ArticleController.php:2533
      • 15. app/Http/Controllers/ArticleController.php:2035
      • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select `bo`.* from `bundle_offer` as `bo` where `bo`.`bundle_status` = 'A' order by `bo`.`bundle_id` desc
      220μsalphaeurekaselec_live_10_06_2022BundleOffer.php#57
      Bindings
      • 0: A
      Backtrace
      • 13. app/Models/BundleOffer.php:57
      • 14. app/Http/Controllers/ArticleController.php:2535
      • 15. app/Http/Controllers/ArticleController.php:2035
      • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
    • select `subtitle` from `journal` where `continues_publication_journal` = 1
      430μsalphaeurekaselec_live_10_06_2022Article.php#1960
      Bindings
      • 0: 1
      Backtrace
      • 13. app/Models/Article.php:1960
      • 14. app/Http/Controllers/ArticleController.php:2062
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • Select j.subtitle, v.volume_id as volume_id,v.year_id,y.year as year,v.volume_name, v.total_no_of_issues, i.issue_id as issue_id,i.title as issue, i.publication_date as issue_pub_date from journal j join volume v on j.journal_id = v.journal_id join issue i on v.volume_id = i.volume_id join article a on a.issue_id = i.issue_id join year y on v.year_id = y.id where j.journal_id = 30 and i.is_uploaded = 1 order by v.volume_name+0 desc, i.title+0 desc limit 1
      26.04msalphaeurekaselec_live_10_06_2022Issue.php#298
      Backtrace
      • 11. app/Models/Issue.php:298
      • 12. app/Http/Controllers/ArticleController.php:2068
      • 13. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 14. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select a.nid,a.publish_on, a.pmid,a.article_id,a.doi,j.journal_id,j.subtitle,v.volume_name,a.volume_id as volume_id, a.issue_id,a.title,first_page, last_page, page_count,abstract,ifnull(is_abstract,"y"),asec.title as article_section,at.type_name as article_type_name, a.article_id as ArticleID ,is_epub,epub_price,epub_type,a.created, y.year from `article` as `a` left join `article_section` as `asec` on `asec`.`art_sec_id` = `a`.`is_epub` left join `article_type` as `at` on `at`.`art_type_id` = `a`.`art_type` left join `journal` as `j` on `j`.`journal_id` = `a`.`journal_id` inner join `volume` as `v` on `a`.`volume_id` = `v`.`volume_id` inner join `year` as `y` on `v`.`year_id` = `y`.`id` where a.article_status != "W" and a.is_epub = 1 and a.journal_id = 30 and a.is_uploaded = 1 group by `a`.`article_id` order by `a`.`publish_on` desc
      13.91msalphaeurekaselec_live_10_06_2022Article.php#528
      Backtrace
      • 13. app/Models/Article.php:528
      • 14. app/Http/Controllers/ArticleController.php:2070
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select a.nid,a.publish_on, a.pmid,a.article_id,a.doi,j.journal_id,j.subtitle,v.volume_name,a.volume_id as volume_id, a.issue_id,a.title,first_page, last_page, page_count,abstract,ifnull(is_abstract,"y"),asec.title as article_section,at.type_name as article_type_name, a.article_id as ArticleID ,is_epub,epub_price,epub_type,a.created, y.year from `article` as `a` left join `article_section` as `asec` on `asec`.`art_sec_id` = `a`.`is_epub` left join `article_type` as `at` on `at`.`art_type_id` = `a`.`art_type` left join `journal` as `j` on `j`.`journal_id` = `a`.`journal_id` inner join `volume` as `v` on `a`.`volume_id` = `v`.`volume_id` inner join `year` as `y` on `v`.`year_id` = `y`.`id` where a.article_status != "W" and a.is_epub = 4 and a.journal_id = 30 and a.is_uploaded = 1 group by `a`.`article_id` order by `a`.`publish_on` desc
      14.62msalphaeurekaselec_live_10_06_2022Article.php#528
      Backtrace
      • 13. app/Models/Article.php:528
      • 14. app/Http/Controllers/ArticleController.php:2071
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select pdf, html, epub, prc from `article_metrics` where `article_id` = 110603 limit 1
      230μsalphaeurekaselec_live_10_06_2022Article.php#744
      Bindings
      • 0: 110603
      Backtrace
      • 14. app/Models/Article.php:744
      • 15. app/Http/Controllers/ArticleController.php:2091
      • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 18. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select * from content_by_diseases where content_id = 110603 and content_type = 'article' order by status desc limit 1
      250μsalphaeurekaselec_live_10_06_2022Article.php#751
      Backtrace
      • 11. app/Models/Article.php:751
      • 12. app/Http/Controllers/ArticleController.php:2094
      • 13. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 14. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select * from `node_meta` where `nid` = 186796 limit 1
      180μsalphaeurekaselec_live_10_06_2022Meta.php#30
      Bindings
      • 0: 186796
      Backtrace
      • 14. app/Models/Meta.php:30
      • 15. app/Http/Controllers/ArticleController.php:2101
      • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 18. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select `bo`.* from `bundle_offer` as `bo` where `bo`.`bundle_status` = 'A' order by `bo`.`bundle_id` desc
      190μsalphaeurekaselec_live_10_06_2022BundleOffer.php#57
      Bindings
      • 0: A
      Backtrace
      • 13. app/Models/BundleOffer.php:57
      • 14. app/Http/Controllers/ArticleController.php:2108
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select * from `tbl_ht_submission` as `h` where `h`.`subtitle` = 'CPB' and (h.proposal_closing_date = 0 OR TO_DAYS(FROM_UNIXTIME(h.proposal_closing_date)) >= TO_DAYS(NOW())) order by `h`.`manuscript` asc
      260μsalphaeurekaselec_live_10_06_2022Article.php#2025
      Bindings
      • 0: CPB
      Backtrace
      • 13. app/Models/Article.php:2025
      • 14. app/Http/Controllers/ArticleController.php:2112
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select count(*) as total_count, content_type_access_id as access_type from journal_access where content_type_id = '110603' and content_type = 'a' and ( (from_date <= CURDATE() and to_date >= CURDATE() and perpetual= 0) or (from_date is null and to_date is null and perpetual= 1) )
      390μsalphaeurekaselec_live_10_06_2022ContentAccess.php#647
      Backtrace
      • 11. app/Models/ContentAccess.php:647
      • 12. app/Http/Controllers/ArticleController.php:2186
      • 13. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 14. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select count(*) as total_count, content_type_access_id as access_type from journal_access where content_type_id = '10661' and content_type = 'i' and ( (from_date <= CURDATE() and to_date >= CURDATE() and perpetual= 0) or (from_date is null and to_date is null and perpetual= 1) )
      280μsalphaeurekaselec_live_10_06_2022ContentAccess.php#647
      Backtrace
      • 11. app/Models/ContentAccess.php:647
      • 12. app/Http/Controllers/ArticleController.php:2207
      • 13. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 14. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select count(*) as total_count, content_type_access_id as access_type from journal_access where content_type_id = '2947' and content_type = 'v' and ( (from_date <= CURDATE() and to_date >= CURDATE() and perpetual= 0) or (from_date is null and to_date is null and perpetual= 1) )
      240μsalphaeurekaselec_live_10_06_2022ContentAccess.php#647
      Backtrace
      • 11. app/Models/ContentAccess.php:647
      • 12. app/Http/Controllers/ArticleController.php:2231
      • 13. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 14. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Trial Access" as access_base_text, CASE j.type WHEN 111 THEN true ELSE false END as terms_popup, "S" as content_download_type, null as restricted_user_access_key, null as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"volume" as access_level,"" as issue_id,"" as article_id from `user_access_journal_volume_trail` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.volume_id = 2947) union (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Subscribed" as access_base_text, false as terms_popup, "S" as content_download_type, null as restricted_user_access_key, null as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"volume" as access_level,"" as issue_id,"" as article_id from `user_access_journal_volume_corporate` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.volume_id = 2947) union (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Token Based Access" as access_base_text, false as terms_popup, "R" as content_download_type, j.uc_id as restricted_user_access_key, "v" as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"volume" as access_level,"" as issue_id,"" as article_id from `user_access_journal_volume_token` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.volume_id = 2947)
      1.87msalphaeurekaselec_live_10_06_2022UserAccess.php#1266
      Backtrace
      • 13. app/Models/UserAccess/UserAccess.php:1266
      • 14. app/Http/Controllers/ArticleController.php:2272
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Trial Access" as access_base_text, CASE j.type WHEN 111 THEN true ELSE false END as terms_popup, "S" as content_download_type, null as restricted_user_access_key, null as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"issue" as access_level,j.issue_id,"" as article_id from `user_access_issue_trail` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.issue_id = 10661) union (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Subscribed" as access_base_text, false as terms_popup, "S" as content_download_type, null as restricted_user_access_key, null as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"issue" as access_level,j.issue_id,"" as article_id from `user_access_issue_corporate` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.issue_id = 10661) union (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Token Based Access" as access_base_text, false as terms_popup, "R" as content_download_type, j.uc_id as restricted_user_access_key, "v" as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"issue" as access_level,j.issue_id,"" as article_id from `user_access_issue_token` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.issue_id = 10661)
      550μsalphaeurekaselec_live_10_06_2022UserAccess.php#1266
      Backtrace
      • 13. app/Models/UserAccess/UserAccess.php:1266
      • 14. app/Http/Controllers/ArticleController.php:2297
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Trial Access" as access_base_text, CASE j.type WHEN 111 THEN true ELSE false END as terms_popup, "S" as content_download_type, null as restricted_user_access_key, null as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"article" as access_level, j.issue_id, j.article_id from `user_access_article_trail` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.article_id = 110603) union (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Subscribed" as access_base_text, false as terms_popup, "S" as content_download_type, null as restricted_user_access_key, null as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"article" as access_level, j.issue_id, j.article_id from `user_access_article_corporate` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.article_id = 110603) union (select j.user_access_id,j.volume_id,j.user_id,j.from_ip,j.to_ip,j.type,j.track,"Token Based Access" as access_base_text, false as terms_popup, "R" as content_download_type, j.uc_id as restricted_user_access_key, "v" as restricted_user_access_type, CASE j.track WHEN 0 THEN false ELSE true END as tracksAccessByVolume,"article" as access_level, j.issue_id, j.article_id from `user_access_article_token` as `j` inner join `user_access_info` as `info` on `j`.`user_access_id` = `info`.`user_access_id` where ((j.from_ip <= 51631602 and j.to_ip >=51631602 )) and ((j.from_date <= 1740345872 and j.to_date >= 1740345872 and j.perpetual= 0) or (j.from_date is null and j.to_date is null and j.perpetual= 1)) and j.article_id = 110603)
      520μsalphaeurekaselec_live_10_06_2022UserAccess.php#1266
      Backtrace
      • 13. app/Models/UserAccess/UserAccess.php:1266
      • 14. app/Http/Controllers/ArticleController.php:2329
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select * from `article` where `first_page` < '1192' and is_uploaded = 1 and issue_id = 10661 order by cast(first_page as SIGNED) desc limit 1
      450μsalphaeurekaselec_live_10_06_2022Article.php#1819
      Bindings
      • 0: 1192
      Backtrace
      • 14. app/Models/Article.php:1819
      • 15. app/Http/Controllers/ArticleController.php:2470
      • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 18. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select * from `article` where `last_page` > '1205' and is_uploaded = 1 and issue_id = 10661 order by cast(first_page as SIGNED) asc limit 1
      380μsalphaeurekaselec_live_10_06_2022Article.php#1831
      Bindings
      • 0: 1205
      Backtrace
      • 14. app/Models/Article.php:1831
      • 15. app/Http/Controllers/ArticleController.php:2472
      • 16. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 17. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 18. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select `language_id` from `multilanguage` where `short_code` = 'en'
      160μsalphaeurekaselec_live_10_06_2022ArticleController.php#2497
      Bindings
      • 0: en
      Backtrace
      • 14. app/Http/Controllers/ArticleController.php:2497
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
      • 18. vendor/laravel/framework/src/Illuminate/Routing/Route.php:206
    • select `source_lang_label`, `target_lang_label` from `multilanguage_labels` where `target_lang_id` = 1
      170μsalphaeurekaselec_live_10_06_2022MultiLanguage.php#23
      Bindings
      • 0: 1
      Backtrace
      • 13. app/Models/MultiLanguage.php:23
      • 14. app/Http/Controllers/ArticleController.php:2498
      • 15. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 16. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
    • select `id` from `multilanguage_article` where `article_id` = 110603 limit 1
      2.32msalphaeurekaselec_live_10_06_2022ArticleController.php#2506
      Bindings
      • 0: 110603
      Backtrace
      • 16. app/Http/Controllers/ArticleController.php:2506
      • 17. vendor/laravel/framework/src/Illuminate/Routing/Controller.php:54
      • 18. vendor/laravel/framework/src/Illuminate/Routing/ControllerDispatcher.php:43
      • 19. vendor/laravel/framework/src/Illuminate/Routing/Route.php:260
      • 20. vendor/laravel/framework/src/Illuminate/Routing/Route.php:206
    • select b.banner_link, b.banner_name, b.banner_script, b.banner_remarks, b.banner_file_name, b.banner_placement, bd.content_type, bd.content_id from `tbl_banner` as `b` inner join `tbl_banner_detail` as `bd` on `bd`.`banner_id` = `b`.`banner_id` inner join `users` as `u` on `u`.`id` = `b`.`updated_by` inner join `journal` as `j` on `j`.`journal_id` = `bd`.`content_id` where `b`.`banner_journal` = 1 and `bd`.`content_type` = 'J' and `bd`.`content_id` = 30 and `b`.`banner_from_date` <= 1740345872 and `b`.`banner_to_date` >= 1740345872 and `b`.`banner_status` = 'A' order by `b`.`banner_id` desc
      1.18msalphaeurekaselec_live_10_06_2022Banner.php#95
      Bindings
      • 0: 1
      • 1: J
      • 2: 30
      • 3: 1740345872
      • 4: 1740345872
      • 5: A
      Backtrace
      • 13. app/Models/Banner.php:95
      • 14. app/Http/helpers.php:404
      • 17. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:124
      • 18. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
      • 19. vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:73
    • select b.banner_link, b.banner_name, b.banner_script, b.banner_remarks, b.banner_file_name, b.banner_placement, bd.content_type, bd.content_id from `tbl_banner` as `b` inner join `tbl_banner_detail` as `bd` on `bd`.`banner_id` = `b`.`banner_id` inner join `users` as `u` on `u`.`id` = `b`.`updated_by` inner join `journal` as `j` on `j`.`journal_id` = `bd`.`content_id` where `b`.`banner_journal` = 1 and `bd`.`content_type` = 'J' and `bd`.`content_id` = 30 and `b`.`banner_from_date` <= 1740345872 and `b`.`banner_to_date` >= 1740345872 and `b`.`banner_status` = 'A' order by `b`.`banner_id` desc
      1.16msalphaeurekaselec_live_10_06_2022Banner.php#95
      Bindings
      • 0: 1
      • 1: J
      • 2: 30
      • 3: 1740345872
      • 4: 1740345872
      • 5: A
      Backtrace
      • 13. app/Models/Banner.php:95
      • 14. app/Http/helpers.php:404
      • 17. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:124
      • 18. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
      • 19. vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:73
    • select count(*) as aggregate from `uc_cart_products` where cart_id='ec27dbbc83927832e94c8b92c0f98c7e'
      240μsalphaeurekaselec_live_10_06_2022Cart.php#271
      Backtrace
      • 15. app/Models/Cart.php:271
      • 16. view::layouts._header:260
      • 18. vendor/laravel/framework/src/Illuminate/Filesystem/Filesystem.php:124
      • 19. vendor/laravel/framework/src/Illuminate/View/Engines/PhpEngine.php:58
      • 20. vendor/laravel/framework/src/Illuminate/View/Engines/CompilerEngine.php:73
    App\Models\MultiLanguage
    1MultiLanguage.php#?
        _token
        DlTRnsCauZk5hIkgL02qZxCA7yCtNEZzXalsxaKP
        uc_cart_id
        ec27dbbc83927832e94c8b92c0f98c7e
        _previous
        array:1 [ "url" => "http://alpha.eurekaselect.com/article/110603" ]
        _flash
        array:2 [ "old" => [] "new" => [] ]
        PHPDEBUGBAR_STACK_DATA
        []
        path_info
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        status_code
        200
        
        status_text
        OK
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        text/html; charset=UTF-8
        request_query
        []
        
        request_request
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        request_headers
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        request_cookies
        []
        
        response_headers
        0 of 0
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        ClearShow all
        Date ↕MethodURLData
        #12025-02-23 21:24:32GET/article/110603414361