2hh4
From Proteopedia
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|PDB= 2hh4 |SIZE=350|CAPTION= <scene name='initialview01'>2hh4</scene> | |PDB= 2hh4 |SIZE=350|CAPTION= <scene name='initialview01'>2hh4</scene> | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=DSN:D-SERINE'>DSN</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= INS ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= INS ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[2hho|2HHO]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2hh4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hh4 OCA], [http://www.ebi.ac.uk/pdbsum/2hh4 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2hh4 RCSB]</span> | ||
}} | }} | ||
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==Disease== | ==Disease== | ||
| - | Known | + | Known disease associated with this structure: Diabetes mellitus, rare form OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=176730 176730]], Hyperproinsulinemia, familial OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=176730 176730]], MODY, one form OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=176730 176730]] |
==About this Structure== | ==About this Structure== | ||
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[[Category: mutant]] | [[Category: mutant]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 03:30:25 2008'' |
Revision as of 00:30, 31 March 2008
| |||||||
| Ligands: | |||||||
| Gene: | INS (Homo sapiens) | ||||||
| Related: | 2HHO
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
NMR structure of human insulin mutant GLY-B8-D-SER, HIS-B10-ASP PRO-B28-LYS, LYS-B29-PRO, 20 structures
Contents |
Overview
How insulin binds to the insulin receptor has long been a subject of speculation. Although the structure of the free hormone has been extensively characterized, a variety of evidence suggests that a conformational change occurs upon receptor binding. Here, we employ chiral mutagenesis, comparison of corresponding d and l amino acid substitutions, to investigate a possible switch in the B-chain. To investigate the interrelation of structure, function, and stability, isomeric analogs have been synthesized in which an invariant glycine in a beta-turn (Gly(B8)) is replaced by d- or l-Ser. The d substitution enhances stability (DeltaDeltaG(u) 0.9 kcal/mol) but impairs receptor binding by 100-fold; by contrast, the l substitution markedly impairs stability (DeltaDeltaG(u) -3.0 kcal/mol) with only 2-fold reduction in receptor binding. Although the isomeric structures each retain a native-like overall fold, the l-Ser(B8) analog exhibits fewer helix-related and long range nuclear Overhauser effects than does the d-Ser(B8) analog or native monomer. Evidence for enhanced conformational fluctuations in the unstable analog is provided by its attenuated CD spectrum. The inverse relationship between stereospecific stabilization and receptor binding strongly suggests that the B7-B10 beta-turn changes conformation on receptor binding.
Disease
Known disease associated with this structure: Diabetes mellitus, rare form OMIM:[176730], Hyperproinsulinemia, familial OMIM:[176730], MODY, one form OMIM:[176730]
About this Structure
2HH4 is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Toward the active conformation of insulin: stereospecific modulation of a structural switch in the B chain., Hua QX, Nakagawa S, Hu SQ, Jia W, Wang S, Weiss MA, J Biol Chem. 2006 Aug 25;281(34):24900-9. Epub 2006 Jun 8. PMID:16762918
Page seeded by OCA on Mon Mar 31 03:30:25 2008
Categories: Homo sapiens | Protein complex | Hu, S Q. | Hua, Q X. | Jia, W. | Nakagawa, S. | Weiss, M A. | Hormone | Human insulin | Mutant
