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1lqb

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{{STRUCTURE_1lqb| PDB=1lqb | SCENE= }}
{{STRUCTURE_1lqb| PDB=1lqb | SCENE= }}
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'''Crystal structure of a hydroxylated HIF-1 alpha peptide bound to the pVHL/elongin-C/elongin-B complex'''
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===Crystal structure of a hydroxylated HIF-1 alpha peptide bound to the pVHL/elongin-C/elongin-B complex===
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==Overview==
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Hypoxia-inducible factor-1 (HIF-1) is a transcriptional complex that controls cellular and systemic homeostatic responses to oxygen availability. HIF-1 alpha is the oxygen-regulated subunit of HIF-1, an alpha beta heterodimeric complex. HIF-1 alpha is stable in hypoxia, but in the presence of oxygen it is targeted for proteasomal degradation by the ubiquitination complex pVHL, the protein of the von Hippel Lindau (VHL) tumour suppressor gene and a component of an E3 ubiquitin ligase complex. Capture of HIF-1 alpha by pVHL is regulated by hydroxylation of specific prolyl residues in two functionally independent regions of HIF-1 alpha. The crystal structure of a hydroxylated HIF-1 alpha peptide bound to VCB (pVHL, elongins C and B) and solution binding assays reveal a single, conserved hydroxyproline-binding pocket in pVHL. Optimized hydrogen bonding to the buried hydroxyprolyl group confers precise discrimination between hydroxylated and unmodified prolyl residues. This mechanism provides a new focus for development of therapeutic agents to modulate cellular responses to hypoxia.
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{{ABSTRACT_PUBMED_12050673}}
==About this Structure==
==About this Structure==
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[[Category: Tumor suppressor]]
[[Category: Tumor suppressor]]
[[Category: Ubiquitin]]
[[Category: Ubiquitin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 00:10:19 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Wed Jul 2 21:46:56 2008''

Revision as of 18:46, 2 July 2008

Image:1lqb.png


PDB ID 1lqb

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1lqb, resolution 2.00Å ()
Ligands:
Non-Standard Residues:
Resources: FirstGlance, OCA, RCSB, PDBsum
Coordinates: save as pdb, mmCIF, xml



Crystal structure of a hydroxylated HIF-1 alpha peptide bound to the pVHL/elongin-C/elongin-B complex

Template:ABSTRACT PUBMED 12050673

About this Structure

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

Reference

Structural basis for the recognition of hydroxyproline in HIF-1 alpha by pVHL., Hon WC, Wilson MI, Harlos K, Claridge TD, Schofield CJ, Pugh CW, Maxwell PH, Ratcliffe PJ, Stuart DI, Jones EY, Nature. 2002 Jun 27;417(6892):975-8. Epub 2002 Jun 5. PMID:12050673

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