2i6i: Difference between revisions

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[[Image:2i6i.jpg|left|200px]]
{{Seed}}
[[Image:2i6i.png|left|200px]]


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{{STRUCTURE_2i6i|  PDB=2i6i  |  SCENE=  }}  
{{STRUCTURE_2i6i|  PDB=2i6i  |  SCENE=  }}  


'''crystal structures of the archaeal sulfolobus PTP-fold phosphatase'''
===crystal structures of the archaeal sulfolobus PTP-fold phosphatase===




==Overview==
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The P-loop-containing protein phos-phatases are important regulators in signal transduction. These enzymes have structural and functional similarity with a conserved sequence of Dx(25-41)HCxxGxxR(T/S) essential for catalysis. The singular protein tyrosine phosphatase (PTP) from archaeal Sulfolobus solfataricus is one of the smallest known PTPs with extreme thermostability. Here, we report the crystal structure of this phosphatase and its complexes with two tyrosyl phosphopeptides A-(p)Y-R and N-K-(p)Y-G-N. The structure suggests the minimal structural motif of the PTP family, having two variable sequences inserted between the beta2-beta3 and beta3-beta4 strands, respectively. The phosphate of both phosphopeptide substrates is bound to the P-loop through several hydrogen bonds. Comparison of several phosphatase-substrate complexes revealed that Gln135 on the Q-loop has different modes of recognition toward phosphopeptides. The substrate specificity of SsoPTP is primarily localized at the phosphotyrosine, suggesting that this phosphatase may be a prototypical PTP.
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{{ABSTRACT_PUBMED_17173287}}


==About this Structure==
==About this Structure==
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[[Category: Wang, A H.J.]]
[[Category: Wang, A H.J.]]
[[Category: Ptp domain]]
[[Category: Ptp domain]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May  4 07:08:18 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 16:13:13 2008''

Revision as of 13:13, 29 July 2008

File:2i6i.png

Template:STRUCTURE 2i6i

crystal structures of the archaeal sulfolobus PTP-fold phosphatase

Template:ABSTRACT PUBMED 17173287

About this Structure

2I6I is a Single protein structure of sequence from Sulfolobus solfataricus. Full crystallographic information is available from OCA.

Reference

Enzyme-substrate interactions revealed by the crystal structures of the archaeal Sulfolobus PTP-fold phosphatase and its phosphopeptide complexes., Chu HM, Wang AH, Proteins. 2007 Mar 1;66(4):996-1003. PMID:17173287

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