Article(id=1208491470911287564, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1208491433888166474, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2021-0619, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1619280000000, receivedDateStr=2021-04-25, revisedDate=1626278400000, revisedDateStr=2021-07-15, acceptedDate=null, acceptedDateStr=null, onlineDate=1766056419351, onlineDateStr=2025-12-18, pubDate=1631376000000, pubDateStr=2021-09-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1766056419351, onlineIssueDateStr=2025-12-18, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1766056419351, creator=13701087609, updateTime=1766056419351, updator=13701087609, issue=Issue{id=1208491433888166474, tenantId=1146029695717560320, journalId=1189982191388893191, year='2021', volume='56', issue='9', pageStart='2325', pageEnd='2596', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1766056410524, creator=13701087609, updateTime=1766137069648, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1208829742833332989, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1208491433888166474, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1208829742833332990, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1208491433888166474, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=2352, endPage=2359, ext={EN=ArticleExt(id=1208491471913726351, articleId=1208491470911287564, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=Determination method of deamidation impurities in cobratide using mass spectrometry technique, columnId=1208491461608321532, journalTitle=Acta Pharmaceutica Sinica, columnName=Special Reports: Bioanalysis for Drug, runingTitle=null, highlight=null, articleAbstract=
Deamidation is one of the most common degradation impurities in protein and peptide drugs. The deamidation of glutamine and asparagine in the protein sequence can lead to changes in the chemical and biological properties of the protein. However, the rutine trypsin-based pretreatment process can significantly increase the artificial deamidation impurities during the digestion process, resulting in high determination level. In this study, after optimizing the conditions of Glu-C enzymatic hydrolysis, we obtained the best enzymatic conditions under acidic condition and the artificial deamidation impurities significantly reduced in digestion process, identified the deamidation site (N48). Through the methodological investigation and comparison of the measurement results of different methods, the specificity, reproducibility and accuracy of the method are verified. The method established in this research has laid a solid foundation for the accurate determination of deamidation impurities in cobratide and its similar protein peptide biochemical drugs.
, correspAuthors=Hui-hong FAN, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2021 Acta Pharmaceutica Sinica. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Lu HUANG, Bo LIU, Hui-hong FAN), CN=ArticleExt(id=1208491475055260295, articleId=1208491470911287564, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=基于质谱分析技术的科博肽中脱酰胺杂质测定方法研究, columnId=1208491461948060192, journalTitle=药学学报, columnName=专题报道:药物生物分析, runingTitle=null, highlight=null, articleAbstract=
脱酰胺是蛋白多肽类药物中最为常见的降解杂质来源之一。蛋白序列中谷氨酰胺和天冬酰胺经脱酰胺降解后会导致蛋白化学与生物学性质的改变。质谱分析技术可用于定量蛋白及多肽中的脱酰胺杂质,然而传统的基于胰蛋白酶的bottom-up策略,酶切过程中易人为引入脱酰胺,往往导致脱酰胺杂质的测定结果偏高。本研究通过对Glu-C酶酶解条件的优化,获得了在酸性条件下的最佳酶解条件,显著降低了酶切过程造成的人为引入脱酰胺的现象,鉴定了科博肽样品中的脱酰胺位点(N48)。并进一步通过方法学考察与不同方法的测定结果对比,验证了方法的专属性、重复性与准确性。本研究所建方法为科博肽及其相似蛋白多肽类生化药品中脱酰胺杂质的精准测定奠定了坚实的基础。
, correspAuthors=范慧红, authorNote=null, correspAuthorsNote=
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24: 1815-1819., articleTitle=Location of the huwentoxin disulfide bonds by partial reduction and step-by-step sequencing, refAbstract=null)], funds=[Fund(id=1208491483586474277, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, awardId=7194337, language=CN, fundingSource=北京市自然科学基金资助项目(7194337), fundOrder=null, country=null), Fund(id=1208491483687137585, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, awardId=1030050090132, language=CN, fundingSource=国家药品监督管理局化学药品质量研究与评价重点实验室课题-蛋白及多肽类生化药物质量评价关键技术研究(1030050090132), fundOrder=null, country=null)], companyList=[AuthorCompany(id=1208491475290141345, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, xref=null, ext=[AuthorCompanyExt(id=1208491475294335650, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, companyId=1208491475290141345, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1. National Institutes for Food and Drug Control, Beijing 100050, China), AuthorCompanyExt(id=1208491475302724260, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, companyId=1208491475290141345, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=1.中国食品药品检定研究院, 北京 100050)]), AuthorCompany(id=1208491475399193268, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, xref=null, ext=[AuthorCompanyExt(id=1208491475411776181, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, companyId=1208491475399193268, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2. NMPA Key Laboratory for Quality Research and Evaluation of Chemical Drugs, Beijing 102629, China), AuthorCompanyExt(id=1208491475420164792, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, companyId=1208491475399193268, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=2.国家药品监督管理局化学药品质量研究与评价重点实验室, 北京 102629)])], figs=[ArticleFig(id=1208491479899680777, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=LckZXZp2HVvXs5CvWG/uWA==, figureFileBig=pmKt0tXRtJHKtPOpBENepA==, tableContent=null), ArticleFig(id=1208491480050675731, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Figure 1, caption=
Amino acid sequence of cobratide , figureFileSmall=LckZXZp2HVvXs5CvWG/uWA==, figureFileBig=pmKt0tXRtJHKtPOpBENepA==, tableContent=null), ArticleFig(id=1208491480352665647, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=KtR0zuzI+2l+IDZBThAAeA==, figureFileBig=ESNjkEUUbxHM2uqmOKxJOg==, tableContent=null), ArticleFig(id=1208491480512049222, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Figure 2, caption=
Cobratide sequence coverage map after 18 hours of digestion with trypsin , figureFileSmall=KtR0zuzI+2l+IDZBThAAeA==, figureFileBig=ESNjkEUUbxHM2uqmOKxJOg==, tableContent=null), ArticleFig(id=1208491480650461271, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=JZAw+9n99VBx27YK+x+cSg==, figureFileBig=PZWosz9atCM+IiJyp5W1rw==, tableContent=null), ArticleFig(id=1208491480793067625, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Figure 3, caption=
Molecular mass analysis of N48-R59 peptide by LC-MS. A: m/z of the peptide (without deamidation). B: m/z of the peptide (deamidation) , figureFileSmall=JZAw+9n99VBx27YK+x+cSg==, figureFileBig=PZWosz9atCM+IiJyp5W1rw==, tableContent=null), ArticleFig(id=1208491480931479674, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=mlj/CrcOoAy8sUKVfA87TQ==, figureFileBig=wRM+CWFx0dwiV9QXgWNZAQ==, tableContent=null), ArticleFig(id=1208491481099251855, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Figure 4, caption=
Identification of the deamidation sites by tandem mass spectra. A: MS/MS spectra of the N48-R59 peptide ion (without deamidation); B: MS/MS spectra of the N48-R59 peptide ion (deamidation) , figureFileSmall=mlj/CrcOoAy8sUKVfA87TQ==, figureFileBig=wRM+CWFx0dwiV9QXgWNZAQ==, tableContent=null), ArticleFig(id=1208491481212498071, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=3hwF8SFbICIBnF5AabJcYw==, figureFileBig=LnQROSmhTWLQq9SFBCt5gw==, tableContent=null), ArticleFig(id=1208491481380270253, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Figure 5, caption=
Sequence coverage map of cobratide digested in optimal conditions , figureFileSmall=3hwF8SFbICIBnF5AabJcYw==, figureFileBig=LnQROSmhTWLQq9SFBCt5gw==, tableContent=null), ArticleFig(id=1208491481480933561, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=Hpgh/JhceDYaOyQPTgGtWQ==, figureFileBig=rCTSiusre+8nsOvXzMqdJw==, tableContent=null), ArticleFig(id=1208491482743419078, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Figure 6, caption=
Sequence coverage map of blank sample , figureFileSmall=Hpgh/JhceDYaOyQPTgGtWQ==, figureFileBig=rCTSiusre+8nsOvXzMqdJw==, tableContent=null), ArticleFig(id=1208491482827305168, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Name | m/z | Observed mass/Da | Expected mass/Da | Mass error/ppm |
| N48-R59 peptide (without deamidation) | 726.814 1 (z = 2) | 1 451.613 2 | 1 451.613 3 | -0.07 |
| N48-R59 peptide (deamidation) | 727.306 4 (z = 2) | 1 452.598 3 | 1 452.597 3 | 0.69 |
| b3 ion (without deamidation) | 285.155 6 (z = 1) | 285.155 6 | 285.155 8 | -0.70 |
| b3 ion (deamidation) | 286.139 5 (z = 1) | 286.139 5 | 286.139 7 | -0.70 |
| y7 ion (without deamidation) | 926.345 2 (z = 1) | 926.345 2 | 926.345 5 | -0.32 |
| y7 ion (deamidation) | 926.345 1 (z = 1) | 926.345 1 | 926.345 5 | -0.43 |
), ArticleFig(id=1208491482923774172, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Table 1, caption=
Observed molecular mass and expected molecular mass of molecular ion peak and fragment ion of the N48-R59 peptide
, figureFileSmall=null, figureFileBig=null, tableContent=
| Name | m/z | Observed mass/Da | Expected mass/Da | Mass error/ppm |
| N48-R59 peptide (without deamidation) | 726.814 1 (z = 2) | 1 451.613 2 | 1 451.613 3 | -0.07 |
| N48-R59 peptide (deamidation) | 727.306 4 (z = 2) | 1 452.598 3 | 1 452.597 3 | 0.69 |
| b3 ion (without deamidation) | 285.155 6 (z = 1) | 285.155 6 | 285.155 8 | -0.70 |
| b3 ion (deamidation) | 286.139 5 (z = 1) | 286.139 5 | 286.139 7 | -0.70 |
| y7 ion (without deamidation) | 926.345 2 (z = 1) | 926.345 2 | 926.345 5 | -0.32 |
| y7 ion (deamidation) | 926.345 1 (z = 1) | 926.345 1 | 926.345 5 | -0.43 |
), ArticleFig(id=1208491483053797612, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| pH | 2 h | | 4 h | | 8 h | | 18 h |
| N48-Deamidation | PeptideMapQuality | N48-Deamidation | PeptideMapQuality | N48-Deamidation | PeptideMapQuality | N48-Deamidation | PeptideMapQuality |
| 4.0 | 0 | 0.003 8 | | 0 | 0.007 4 | | 0 | 0.013 3 | | 0 | 0.349 0 |
| 4.5 | 0 | 0.041 6 | 16.28% | 0.094 5 | 15.17% | 0.178 2 | 16.64% | 0.389 8 |
| 5.0 | 15.21% | 0.265 0 | 15.04% | 0.486 2 | 15.01% | 0.712 5 | 14.95% | 0.919 6 |
| 5.5 | 14.71% | 0.906 3 | 14.69% | 0.975 7 | 14.85% | 0.991 0 | 14.72% | 0.999 0 |
| 6.0 | 14.27% | 0.988 7 | 16.42% | 0.997 6 | 26.00% | 0.998 4 | 40.19% | 0.999 1 |
| 7.9 | 49.67% | 0.366 9 | 60.40% | 0.578 5 | 85.47% | 0.819 6 | 98.30% | 0.808 2 |
), ArticleFig(id=1208491483175432443, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Table 2, caption=
Comparison of the deamidation rate and PeptideMapQuality values of cobratide digested by Glu-C enzyme in different pH buffer systems
, figureFileSmall=null, figureFileBig=null, tableContent=
| pH | 2 h | | 4 h | | 8 h | | 18 h |
| N48-Deamidation | PeptideMapQuality | N48-Deamidation | PeptideMapQuality | N48-Deamidation | PeptideMapQuality | N48-Deamidation | PeptideMapQuality |
| 4.0 | 0 | 0.003 8 | | 0 | 0.007 4 | | 0 | 0.013 3 | | 0 | 0.349 0 |
| 4.5 | 0 | 0.041 6 | 16.28% | 0.094 5 | 15.17% | 0.178 2 | 16.64% | 0.389 8 |
| 5.0 | 15.21% | 0.265 0 | 15.04% | 0.486 2 | 15.01% | 0.712 5 | 14.95% | 0.919 6 |
| 5.5 | 14.71% | 0.906 3 | 14.69% | 0.975 7 | 14.85% | 0.991 0 | 14.72% | 0.999 0 |
| 6.0 | 14.27% | 0.988 7 | 16.42% | 0.997 6 | 26.00% | 0.998 4 | 40.19% | 0.999 1 |
| 7.9 | 49.67% | 0.366 9 | 60.40% | 0.578 5 | 85.47% | 0.819 6 | 98.30% | 0.808 2 |
), ArticleFig(id=1208491483305455881, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| Batch | LC-HRMS | CE |
| A | 15.88% | 15.06% |
| B | 5.06% | 4.29% |
| C | 15.01% | 15.02% |
), ArticleFig(id=1208491483427090711, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1208491470911287564, language=CN, label=Table 3, caption=
Comparison of cobratide deamidation rate detected by LC-HRMS and CE
, figureFileSmall=null, figureFileBig=null, tableContent=
| Batch | LC-HRMS | CE |
| A | 15.88% | 15.06% |
| B | 5.06% | 4.29% |
| C | 15.01% | 15.02% |
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