2ask
From Proteopedia
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[[Image:2ask.gif|left|200px]] | [[Image:2ask.gif|left|200px]] | ||
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'''Structure of human Artemin''' | '''Structure of human Artemin''' | ||
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[[Category: Sah, D.]] | [[Category: Sah, D.]] | ||
[[Category: Silvian, L.]] | [[Category: Silvian, L.]] | ||
| - | [[Category: | + | [[Category: Glial cell derived family ligand]] |
| - | [[Category: | + | [[Category: Neurotrphoic growth factor]] |
| - | [[Category: | + | [[Category: Sulfate]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 19:25:34 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 16:25, 3 May 2008
Structure of human Artemin
Overview
Artemin (ART) promotes the growth of developing peripheral neurons by signaling through a multicomponent receptor complex comprised of a transmembrane tyrosine kinase receptor (cRET) and a specific glycosylphosphatidylinositol-linked co-receptor (GFRalpha3). Glial cell line-derived neurotrophic factor (GDNF) signals through a similar ternary complex but requires heparan sulfate proteoglycans (HSPGs) for full activity. HSPG has not been demonstrated as a requirement for ART signaling. We crystallized ART in the presence of sulfate and solved its structure by isomorphous replacement. The structure reveals ordered sulfate anions bound to arginine residues in the pre-helix and amino-terminal regions that were organized in a triad arrangement characteristic of heparan sulfate. Three residues in the pre-helix were singly or triply substituted with glutamic acid, and the resulting proteins were shown to have reduced heparin-binding affinity that is partly reflected in their ability to activate cRET. This study suggests that ART binds HSPGs and identifies residues that may be involved in HSPG binding.
About this Structure
2ASK is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
Artemin crystal structure reveals insights into heparan sulfate binding., Silvian L, Jin P, Carmillo P, Boriack-Sjodin PA, Pelletier C, Rushe M, Gong B, Sah D, Pepinsky B, Rossomando A, Biochemistry. 2006 Jun 6;45(22):6801-12. PMID:16734417 Page seeded by OCA on Sat May 3 19:25:34 2008
