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- Publisher Website: 10.1021/bi00679a002
- Scopus: eid_2-s2.0-0016681633
- PMID: 164891
- WOS: WOS:A1975W280600002
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Article: Structure-function relationships in glucagon: Properties of highly purified des-His1-, monoiodo-, and [des-Asn 28,Thr 29](homoserine lactone 27)-glucagon
Title | Structure-function relationships in glucagon: Properties of highly purified des-His1-, monoiodo-, and [des-Asn 28,Thr 29](homoserine lactone 27)-glucagon |
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Authors | |
Issue Date | 1975 |
Publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/biochemistry |
Citation | Biochemistry, 1975, v. 14 n. 8, p. 1559-1563 How to Cite? |
Abstract | We have compared the ability of glucagon and three highly purified derivatives of the hormone to activate hepatic adenylate cyclase (an expression of biological activity of the hormone) and to compete with [ 125] glucagon for binding to sites specific for glucagon in hepatic plasma membranes. Relative to that of glucagon, biological activity and affinity of [des-Asn 28,Thr 29](homoserine lactone 27)-glucagon, prepared by CNBr treatment of glucagon, were reduced equally by 40- to 50-fold. By contrast, des-His 1-glucagon, prepared by an insoluble Edman reagent and highly purified (less than 0.5% contamination with native glucagon), displayed a 15-fold decrease in affinity but a 50-fold decrease in biological activity relative to that of the native hormone. At maximal stimulating concentrations, des-His 1-glucagon yielded 70% of the activity given by saturating concentrations of glucagon. Thus, des-His 1-glucagon can be classified as a partial, weak agonist. Highly purified monoiodoglucagon and native glucagon displayed identical biological activity and affinity for the binding sites. Our findings suggest that the hydrophilic residues at the terminus of the carboxy region of glucagon are involved in the process of recognition at the glucagon receptor but do not participate in the sequence of events leading to activation of adenylate cyclase. The amino-terminal histidyl residue in glucagon plays an important but not obligatory role in the expression of hormone action and contributes to a significant extent in the recognition process. |
Persistent Identifier | http://hdl.handle.net/10722/167433 |
ISSN | 2023 Impact Factor: 2.9 2023 SCImago Journal Rankings: 1.042 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Lin, MC | en_US |
dc.contributor.author | Wright, DE | en_US |
dc.contributor.author | Hruby, VJ | en_US |
dc.contributor.author | Rodbell, M | en_US |
dc.date.accessioned | 2012-10-08T03:06:55Z | - |
dc.date.available | 2012-10-08T03:06:55Z | - |
dc.date.issued | 1975 | en_US |
dc.identifier.citation | Biochemistry, 1975, v. 14 n. 8, p. 1559-1563 | en_US |
dc.identifier.issn | 0006-2960 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/167433 | - |
dc.description.abstract | We have compared the ability of glucagon and three highly purified derivatives of the hormone to activate hepatic adenylate cyclase (an expression of biological activity of the hormone) and to compete with [ 125] glucagon for binding to sites specific for glucagon in hepatic plasma membranes. Relative to that of glucagon, biological activity and affinity of [des-Asn 28,Thr 29](homoserine lactone 27)-glucagon, prepared by CNBr treatment of glucagon, were reduced equally by 40- to 50-fold. By contrast, des-His 1-glucagon, prepared by an insoluble Edman reagent and highly purified (less than 0.5% contamination with native glucagon), displayed a 15-fold decrease in affinity but a 50-fold decrease in biological activity relative to that of the native hormone. At maximal stimulating concentrations, des-His 1-glucagon yielded 70% of the activity given by saturating concentrations of glucagon. Thus, des-His 1-glucagon can be classified as a partial, weak agonist. Highly purified monoiodoglucagon and native glucagon displayed identical biological activity and affinity for the binding sites. Our findings suggest that the hydrophilic residues at the terminus of the carboxy region of glucagon are involved in the process of recognition at the glucagon receptor but do not participate in the sequence of events leading to activation of adenylate cyclase. The amino-terminal histidyl residue in glucagon plays an important but not obligatory role in the expression of hormone action and contributes to a significant extent in the recognition process. | en_US |
dc.language | eng | en_US |
dc.publisher | American Chemical Society. The Journal's web site is located at http://pubs.acs.org/biochemistry | en_US |
dc.relation.ispartof | Biochemistry | en_US |
dc.title | Structure-function relationships in glucagon: Properties of highly purified des-His1-, monoiodo-, and [des-Asn 28,Thr 29](homoserine lactone 27)-glucagon | en_US |
dc.type | Article | en_US |
dc.identifier.email | Lin, MC:mcllin@hkucc.hku.hk | en_US |
dc.identifier.authority | Lin, MC=rp00746 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1021/bi00679a002 | - |
dc.identifier.pmid | 164891 | - |
dc.identifier.scopus | eid_2-s2.0-0016681633 | en_US |
dc.identifier.volume | 14 | en_US |
dc.identifier.issue | 8 | en_US |
dc.identifier.spage | 1559 | en_US |
dc.identifier.epage | 1563 | en_US |
dc.identifier.isi | WOS:A1975W280600002 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Lin, MC=7404816359 | en_US |
dc.identifier.scopusauthorid | Wright, DE=7404381610 | en_US |
dc.identifier.scopusauthorid | Hruby, VJ=36077273000 | en_US |
dc.identifier.scopusauthorid | Rodbell, M=7006658086 | en_US |
dc.identifier.issnl | 0006-2960 | - |