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1lm8

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(New page: 200px<br /> <applet load="1lm8" size="450" color="white" frame="true" align="right" spinBox="true" caption="1lm8, resolution 1.85&Aring;" /> '''Structure of a HIF-...)
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Revision as of 15:56, 12 November 2007

Image:1lm8.gif

1lm8, resolution 1.85Å

Drag the structure with the mouse to rotate

Structure of a HIF-1a-pVHL-ElonginB-ElonginC Complex

Contents

Overview

The ubiquitination of the hypoxia-inducible factor (HIF) by the von, Hippel-Lindau tumor suppressor (pVHL) plays a central role in the cellular, response to changes in oxygen availability. pVHL binds to HIF only when a, conserved proline in HIF is hydroxylated, a modification that is, oxygen-dependent. The 1.85 angstrom structure of a 20-residue HIF-1alpha, peptide-pVHL-ElonginB-ElonginC complex shows that HIF-1alpha binds to pVHL, in an extended beta strand-like conformation. The hydroxyproline inserts, into a gap in the pVHL hydrophobic core, at a site that is a hotspot for, tumorigenic mutations, with its 4-hydroxyl group recognized by buried, serine and histidine residues. Although the beta sheet-like interactions, contribute to the stability of the complex, the hydroxyproline contacts, are central to the strict specificity characteristic of signaling.

Disease

Known diseases associated with this structure: Hemangioblastoma, cerebellar, somatic OMIM:[608537], Pheochromocytoma OMIM:[608537], Polycythemia, benign familial OMIM:[608537], Renal cell carcinoma, somatic OMIM:[608537], von Hippel-Lindau syndrome OMIM:[608537]

About this Structure

1LM8 is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Structure of an HIF-1alpha -pVHL complex: hydroxyproline recognition in signaling., Min JH, Yang H, Ivan M, Gertler F, Kaelin WG Jr, Pavletich NP, Science. 2002 Jun 7;296(5574):1886-9. Epub 2002 May 9. PMID:12004076

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