1qmu
From Proteopedia
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'''DUCK CARBOXYPEPTIDASE D DOMAIN II''' | '''DUCK CARBOXYPEPTIDASE D DOMAIN II''' | ||
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[[Category: Gomis-Rueth, F X.]] | [[Category: Gomis-Rueth, F X.]] | ||
[[Category: Vendrell, J.]] | [[Category: Vendrell, J.]] | ||
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Revision as of 03:27, 3 May 2008
DUCK CARBOXYPEPTIDASE D DOMAIN II
Overview
The crystal structure of domain II of duck carboxypeptidase D, a prohormone/propeptide processing enzyme integrated in a three repeat tandem in the natural system, has been solved, constituting a prototype for members of the regulatory metallocarboxypeptidase subfamily. It displays a 300 residue N-terminal alpha/beta-hydrolase subdomain with overall topological similarity to and general coincidence of the key catalytic residues with the archetypal pancreatic carboxypeptidase A. However, numerous significant insertions/deletions in segments forming the funnel-like access to the active site explain differences in specificity towards larger protein substrates or inhibitors. This alpha/beta-hydrolase subdomain is followed by a C-terminal 80 residue beta-sandwich subdomain, unique for these regulatory metalloenzymes and topologically related to transthyretin and sugar-binding proteins. The structure described here establishes the fundamentals for a better understanding of the mechanism ruling events such as prohormone processing and will enable modelling of regulatory carboxypeptidases as well as a more rational design of inhibitors of carboxypeptidase D.
About this Structure
1QMU is a Single protein structure of sequence from Anas specularioides. Full crystallographic information is available from OCA.
Reference
Crystal structure of avian carboxypeptidase D domain II: a prototype for the regulatory metallocarboxypeptidase subfamily., Gomis-Ruth FX, Companys V, Qian Y, Fricker LD, Vendrell J, Aviles FX, Coll M, EMBO J. 1999 Nov 1;18(21):5817-26. PMID:10545093 Page seeded by OCA on Sat May 3 06:27:49 2008
