1g4w
From Proteopedia
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'''CRYSTAL STRUCTURE OF THE SALMONELLA TYROSINE PHOSPHATASE AND GTPASE ACTIVATING PROTEIN SPTP''' | '''CRYSTAL STRUCTURE OF THE SALMONELLA TYROSINE PHOSPHATASE AND GTPASE ACTIVATING PROTEIN SPTP''' | ||
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[[Category: Stebbins, C E.]] | [[Category: Stebbins, C E.]] | ||
[[Category: 4-helix bundle]] | [[Category: 4-helix bundle]] | ||
| - | [[Category: | + | [[Category: Disorder]] |
| - | [[Category: | + | [[Category: Gtpase activating protein]] |
| - | [[Category: | + | [[Category: Tyrosine phosphatase]] |
| - | [[Category: | + | [[Category: Virulence factor]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 17:08:31 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 14:08, 2 May 2008
CRYSTAL STRUCTURE OF THE SALMONELLA TYROSINE PHOSPHATASE AND GTPASE ACTIVATING PROTEIN SPTP
Overview
Salmonella spp. utilize a specialized protein secretion system to deliver a battery of effector proteins into host cells. Several of these effectors stimulate Cdc42- and Rac1-dependent cytoskeletal changes that promote bacterial internalization. These potentially cytotoxic alterations are rapidly reversed by the effector SptP, a tyrosine phosphatase and GTPase activating protein (GAP) that targets Cdc42 and Rac1. The 2.3 A resolution crystal structure of an SptP-Rac1 transition state complex reveals an unusual GAP architecture that mimics host functional homologs. The phosphatase domain possesses a conserved active site but distinct surface properties. Binding to Rac1 induces a dramatic stabilization in SptP of a four-helix bundle that makes extensive contacts with the Switch I and Switch II regions of the GTPase.
About this Structure
1G4W is a Single protein structure of sequence from Salmonella typhimurium. Full crystallographic information is available from OCA.
Reference
Modulation of host signaling by a bacterial mimic: structure of the Salmonella effector SptP bound to Rac1., Stebbins CE, Galan JE, Mol Cell. 2000 Dec;6(6):1449-60. PMID:11163217 Page seeded by OCA on Fri May 2 17:08:31 2008
