3bps: Difference between revisions

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{{STRUCTURE_3bps|  PDB=3bps  |  SCENE=  }}  
{{STRUCTURE_3bps|  PDB=3bps  |  SCENE=  }}  


'''PCSK9:EGF-A complex'''
===PCSK9:EGF-A complex===




==Overview==
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Proprotein convertase subtilisin/kexin type 9 (PCSK9) posttranslationally regulates hepatic low-density lipoprotein receptors (LDLRs) by binding to LDLRs on the cell surface, leading to their degradation. The binding site of PCSK9 has been localized to the epidermal growth factor-like repeat A (EGF-A) domain of the LDLR. Here, we describe the crystal structure of a complex between PCSK9 and the EGF-A domain of the LDLR. The binding site for the LDLR EGF-A domain resides on the surface of PCSK9's subtilisin-like catalytic domain containing Asp-374, a residue for which a gain-of-function mutation (Asp-374-Tyr) increases the affinity of PCSK9 toward LDLR and increases plasma LDL-cholesterol (LDL-C) levels in humans. The binding surface on PCSK9 is distant from its catalytic site, and the EGF-A domain makes no contact with either the C-terminal domain or the prodomain. Point mutations in PCSK9 that altered key residues contributing to EGF-A binding (Arg-194 and Phe-379) greatly diminished binding to the LDLR's extracellular domain. The structure of PCSK9 in complex with the LDLR EGF-A domain defines potential therapeutic target sites for blocking agents that could interfere with this interaction in vivo, thereby increasing LDLR function and reducing plasma LDL-C levels.
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{{ABSTRACT_PUBMED_18250299}}


==Disease==
==Disease==
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[[Category: Transport]]
[[Category: Transport]]
[[Category: Zymogen]]
[[Category: Zymogen]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 20:59:07 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 05:00:52 2008''

Revision as of 05:00, 28 July 2008

File:3bps.png

Template:STRUCTURE 3bps

PCSK9:EGF-A complexPCSK9:EGF-A complex

Template:ABSTRACT PUBMED 18250299

DiseaseDisease

Known disease associated with this structure: Hypercholesterolemia, familial OMIM:[606945]

About this StructureAbout this Structure

3BPS is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

ReferenceReference

Molecular basis for LDL receptor recognition by PCSK9., Kwon HJ, Lagace TA, McNutt MC, Horton JD, Deisenhofer J, Proc Natl Acad Sci U S A. 2008 Feb 12;105(6):1820-5. Epub 2008 Feb 4. PMID:18250299

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