3p2p: Difference between revisions

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[[Image:3p2p.jpg|left|200px]]
{{Seed}}
[[Image:3p2p.png|left|200px]]


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{{STRUCTURE_3p2p|  PDB=3p2p  |  SCENE=  }}  
{{STRUCTURE_3p2p|  PDB=3p2p  |  SCENE=  }}  


'''ENHANCED ACTIVITY AND ALTERED SPECIFICITY OF PHOSPHOLIPASE A2 BY DELETION OF A SURFACE LOOP'''
===ENHANCED ACTIVITY AND ALTERED SPECIFICITY OF PHOSPHOLIPASE A2 BY DELETION OF A SURFACE LOOP===




==Overview==
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Protein engineering and x-ray crystallography have been used to study the role of a surface loop that is present in pancreatic phospholipases but is absent in snake venom phospholipases. Removal of residues 62 to 66 from porcine pancreatic phospholipase A2 does not change the binding constant for micelles significantly, but it improves catalytic activity up to 16 times on micellar (zwitterionic) lecithin substrates. In contrast, the decrease in activity on negatively charged substrates is greater than fourfold. A crystallographic study of the mutant enzyme shows that the region of the deletion has a well-defined structure that differs from the structure of the wild-type enzyme. No structural changes in the active site of the enzyme were detected.
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{{ABSTRACT_PUBMED_2704992}}


==About this Structure==
==About this Structure==
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[[Category: Kalk, K H.]]
[[Category: Kalk, K H.]]
[[Category: Thunnissen, M M.G M.]]
[[Category: Thunnissen, M M.G M.]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 22:08:41 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Jul 3 12:58:44 2008''

Revision as of 09:58, 3 July 2008

File:3p2p.png

Template:STRUCTURE 3p2p

ENHANCED ACTIVITY AND ALTERED SPECIFICITY OF PHOSPHOLIPASE A2 BY DELETION OF A SURFACE LOOP

Template:ABSTRACT PUBMED 2704992

About this Structure

3P2P is a Single protein structure of sequence from Sus scrofa. Full crystallographic information is available from OCA.

Reference

Enhanced activity and altered specificity of phospholipase A2 by deletion of a surface loop., Kuipers OP, Thunnissen MM, de Geus P, Dijkstra BW, Drenth J, Verheij HM, de Haas GH, Science. 1989 Apr 7;244(4900):82-5. PMID:2704992

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