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1ho0

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Revision as of 09:18, 10 January 2018

NEW B-CHAIN MUTANT OF BOVINE INSULIN

Structural highlights

1ho0 is a 1 chain structure. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[INS_BOVIN] Insulin decreases blood glucose concentration. It increases cell permeability to monosaccharides, amino acids and fatty acids. It accelerates glycolysis, the pentose phosphate cycle, and glycogen synthesis in liver.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The solution structure of a new B-chain mutant of bovine insulin, in which the cysteines B7 and B19 are replaced by two serines, has been determined by circular dichroism, 2D-NMR and molecular modeling. This structure is compared with that of the oxidized B-chain of bovine insulin [Hawkins et al. (1995) Int. J. Peptide Protein Res.46, 424-433]. Circular dichroism spectroscopy showed in particular that a higher percentage of helical secondary structure for the B-chain mutant is estimated in trifluoroethanol solution in comparison with the oxidized B-chain. 2D-NMR experiments confirmed, among multiple conformations, that the B-chain mutant presents defined secondary structures such as a alpha-helix between residues B9 and B19, and a beta-turn between amino acids B20 and B23 in aqueous trifluoroethanol. The 3D structures, which are consistent with NMR data and were obtained using a simulated annealing protocol, showed that the tertiary structure of the B-chain mutant is better resolved and is more in agreement with the insulin crystal structure than the oxidized B-chain structure described by Hawkins et al. An explanation could be the presence of two sulfonate groups in the oxidized insulin B-chain. Either by their charges and/or their size, such chemical groups could play a destructuring effect and thus could favor peptide flexibility and conformational averaging. Thus, this study provides new insights on the folding of isolated B-chains.

A new B-chain mutant of insulin: comparison with the insulin crystal structure and role of sulfonate groups in the B-chain structure.,Dupradeau FY, Richard T, Le Flem G, Oulyadi H, Prigent Y, Monti JP J Pept Res. 2002 Jul;60(1):56-64. PMID:12081626^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Dupradeau FY, Richard T, Le Flem G, Oulyadi H, Prigent Y, Monti JP. A new B-chain mutant of insulin: comparison with the insulin crystal structure and role of sulfonate groups in the B-chain structure. J Pept Res. 2002 Jul;60(1):56-64. PMID:12081626

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1ho0"

@@ Line 1: / Line 1: @@
 ==NEW B-CHAIN MUTANT OF BOVINE INSULIN==
 <StructureSection load='1ho0' size='340' side='right' caption='[[1ho0]], [[NMR_Ensembles_of_Models | 21 NMR models]]' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1ho0]] is a 1 chain structure. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1HO0 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1HO0 FirstGlance]. <br>
-</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ho0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ho0 OCA], [http://pdbe.org/1ho0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ho0 RCSB], [http://www.ebi.ac.uk/pdbsum/1ho0 PDBsum]</span></td></tr>
+</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ho0 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ho0 OCA], [http://pdbe.org/1ho0 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ho0 RCSB], [http://www.ebi.ac.uk/pdbsum/1ho0 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ho0 ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 11: / Line 12: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ho/1ho0_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ho/1ho0_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 26: / Line 27: @@
 </div>
 <div class="pdbe-citations 1ho0" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Molecular Playground/Insulin|Molecular Playground/Insulin]]
 == References ==
 <references/>

1ho0

From Proteopedia

Revision as of 09:18, 10 January 2018

NEW B-CHAIN MUTANT OF BOVINE INSULIN

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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