1by7: Difference between revisions

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[[Image:1by7.gif|left|200px]]
{{Seed}}
[[Image:1by7.png|left|200px]]


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{{STRUCTURE_1by7|  PDB=1by7  |  SCENE=  }}  
{{STRUCTURE_1by7|  PDB=1by7  |  SCENE=  }}  


'''HUMAN PLASMINOGEN ACTIVATOR INHIBITOR-2. LOOP (66-98) DELETION MUTANT'''
===HUMAN PLASMINOGEN ACTIVATOR INHIBITOR-2. LOOP (66-98) DELETION MUTANT===




==Overview==
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BACKGROUND: Plasminogen activator inhibitor 2 (PAI-2) is a member of the serpin family of protease inhibitors that function via a dramatic structural change from a native, stressed state to a relaxed form. This transition is mediated by a segment of the serpin termed the reactive centre loop (RCL); the RCL is cleaved on interaction with the protease and becomes inserted into betasheet A of the serpin. Major questions remain as to what factors facilitate this transition and how they relate to protease inhibition. RESULTS: The crystal structure of a mutant form of human PAI-2 in the stressed state has been determined at 2.0 A resolution. The RCL is completely disordered in the structure. An examination of polar residues that are highly conserved across all serpins identifies functionally important regions. A buried polar cluster beneath betasheet A (the so-called 'shutter' region) is found to stabilise both the stressed and relaxed forms via a rearrangement of hydrogen bonds. CONCLUSIONS: A statistical analysis of interstrand interactions indicated that the shutter region can be used to discriminate between inhibitory and non-inhibitory serpins. This analysis implied that insertion of the RCL into betasheet A up to residue P8 is important for protease inhibition and hence the structure of the complex formed between the serpin and the target protease.
The line below this paragraph, {{ABSTRACT_PUBMED_10368272}}, adds the Publication Abstract to the page
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{{ABSTRACT_PUBMED_10368272}}


==About this Structure==
==About this Structure==
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[[Category: Mabbutt, B C.]]
[[Category: Mabbutt, B C.]]
[[Category: Serpin]]
[[Category: Serpin]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 12:06:31 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 19:54:23 2008''

Revision as of 16:54, 30 June 2008

File:1by7.png

Template:STRUCTURE 1by7

HUMAN PLASMINOGEN ACTIVATOR INHIBITOR-2. LOOP (66-98) DELETION MUTANT

Template:ABSTRACT PUBMED 10368272

About this Structure

1BY7 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

The crystal structure of plasminogen activator inhibitor 2 at 2.0 A resolution: implications for serpin function., Harrop SJ, Jankova L, Coles M, Jardine D, Whittaker JS, Gould AR, Meister A, King GC, Mabbutt BC, Curmi PM, Structure. 1999 Jan 15;7(1):43-54. PMID:10368272

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