1jrr

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[[Image:1jrr.gif|left|200px]]
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{{STRUCTURE_1jrr| PDB=1jrr | SCENE= }}
{{STRUCTURE_1jrr| PDB=1jrr | SCENE= }}
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'''HUMAN PLASMINOGEN ACTIVATOR INHIBITOR-2.[LOOP (66-98) DELETIONMUTANT] COMPLEXED WITH PEPTIDE MIMIckING THE REACTIVE CENTER LOOP'''
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===HUMAN PLASMINOGEN ACTIVATOR INHIBITOR-2.[LOOP (66-98) DELETIONMUTANT] COMPLEXED WITH PEPTIDE MIMIckING THE REACTIVE CENTER LOOP===
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==Overview==
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The structure of the serpin, plasminogen activator inhibitor type-2 (PAI-2), in a complex with a peptide mimicking its reactive center loop (RCL) has been determined at 1.6-A resolution. The structure shows the relaxed state serpin structure with a prominent six-stranded beta-sheet. Clear electron density is seen for all residues in the peptide. The P1 residue of the peptide binds to a well defined pocket at the base of PAI-2 that may be important in determining the specificity of protease inhibition. The stressed-to-relaxed state (S --&gt; R) transition in PAI-2 can be modeled as the relative motion between a quasirigid core domain and a smaller segment comprising helix hF and beta-strands s1A, s2A, and s3A. A comparison of the Ramachandran plots of the stressed and relaxed state PAI-2 structures reveals the location of several hinge regions connecting these two domains. The hinge regions cluster in three locations on the structure, ensuring a cooperative S --&gt; R transition. We hypothesize that the hinge formed by the conserved Gly(206) on beta-strand s3A in the breach region of PAI-2 effects the S --&gt; R transition by altering its backbone torsion angles. This torsional change is due to the binding of the P14 threonine of the RCL to the open breach region of PAI-2.
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(as it appears on PubMed at http://www.pubmed.gov), where 11546761 is the PubMed ID number.
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{{ABSTRACT_PUBMED_11546761}}
==About this Structure==
==About this Structure==
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[[Category: Peptide binding]]
[[Category: Peptide binding]]
[[Category: Serpin]]
[[Category: Serpin]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 21:46:32 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 1 20:42:18 2008''

Revision as of 17:42, 1 July 2008

Image:1jrr.png

Template:STRUCTURE 1jrr

HUMAN PLASMINOGEN ACTIVATOR INHIBITOR-2.[LOOP (66-98) DELETIONMUTANT] COMPLEXED WITH PEPTIDE MIMIckING THE REACTIVE CENTER LOOP

Template:ABSTRACT PUBMED 11546761

About this Structure

1JRR is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structure of the complex of plasminogen activator inhibitor 2 with a peptide mimicking the reactive center loop., Jankova L, Harrop SJ, Saunders DN, Andrews JL, Bertram KC, Gould AR, Baker MS, Curmi PM, J Biol Chem. 2001 Nov 16;276(46):43374-82. Epub 2001 Aug 23. PMID:11546761

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