2hdx
From Proteopedia
| Line 4: | Line 4: | ||
|PDB= 2hdx |SIZE=350|CAPTION= <scene name='initialview01'>2hdx</scene>, resolution 2.35Å | |PDB= 2hdx |SIZE=350|CAPTION= <scene name='initialview01'>2hdx</scene>, resolution 2.35Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= | + | |LIGAND= <scene name='pdbligand=PTR:O-PHOSPHOTYROSINE'>PTR</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= Sh2bpsm1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus]) | |GENE= Sh2bpsm1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=10090 Mus musculus]) | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2hdx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hdx OCA], [http://www.ebi.ac.uk/pdbsum/2hdx PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2hdx RCSB]</span> | ||
}} | }} | ||
| Line 29: | Line 32: | ||
[[Category: sh2]] | [[Category: sh2]] | ||
| - | ''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 03:29:02 2008'' |
Revision as of 00:29, 31 March 2008
| |||||||
| , resolution 2.35Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | |||||||
| Gene: | Sh2bpsm1 (Mus musculus) | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal structure of the Src homology-2 domain of SH2-B in complex with Jak2 pTyr813 phosphopeptide
Overview
SH2-B, APS, and Lnk constitute a family of adapter proteins that modulate signaling by protein tyrosine kinases. These adapters contain an N-terminal dimerization region, a pleckstrin homology domain, and a C-terminal Src homology-2 (SH2) domain. SH2-B is recruited via its SH2 domain to various protein tyrosine kinases, including Janus kinase-2 (Jak2) and the insulin receptor. Here, we present the crystal structure at 2.35 A resolution of the SH2 domain of SH2-B in complex with a phosphopeptide representing the SH2-B recruitment site in Jak2 (pTyr813). The structure reveals a canonical SH2 domain-phosphopeptide binding mode, but with specific recognition of a glutamate at the +1 position relative to phosphotyrosine, in addition to recognition of a hydrophobic residue at the +3 position. Biochemical studies of SH2-B and APS demonstrate that, although the SH2 domains of these two adapter proteins share 79% sequence identity, the SH2-B SH2 domain binds preferentially to Jak2, whereas the APS SH2 domain has higher affinity for the insulin receptor. This differential specificity is attributable to the difference in the oligomeric states of the two SH2 domains: monomeric for SH2-B and dimeric for APS.
About this Structure
2HDX is a Protein complex structure of sequences from Mus musculus. Full crystallographic information is available from OCA.
Reference
Structural basis for phosphotyrosine recognition by the Src homology-2 domains of the adapter proteins SH2-B and APS., Hu J, Hubbard SR, J Mol Biol. 2006 Aug 4;361(1):69-79. Epub 2006 Jun 16. PMID:16824542
Page seeded by OCA on Mon Mar 31 03:29:02 2008
