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1kvy
From Proteopedia
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[[Image:1kvy.gif|left|200px]] | [[Image:1kvy.gif|left|200px]] | ||
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'''CARBOXYLIC ESTER HYDROLASE, SINGLE MUTANT D49E COORDINATED TO CALCIUM''' | '''CARBOXYLIC ESTER HYDROLASE, SINGLE MUTANT D49E COORDINATED TO CALCIUM''' | ||
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Structures of the catalytic site mutants D99A and H48Q and the calcium-loop mutant D49E of phospholipase A2., Sekar K, Biswas R, Li Y, Tsai M, Sundaralingam M, Acta Crystallogr D Biol Crystallogr. 1999 Feb;55(Pt 2):443-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10089353 10089353] | Structures of the catalytic site mutants D99A and H48Q and the calcium-loop mutant D49E of phospholipase A2., Sekar K, Biswas R, Li Y, Tsai M, Sundaralingam M, Acta Crystallogr D Biol Crystallogr. 1999 Feb;55(Pt 2):443-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10089353 10089353] | ||
[[Category: Bos taurus]] | [[Category: Bos taurus]] | ||
| - | [[Category: Phospholipase A(2)]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Sundaralingam, M.]] | [[Category: Sundaralingam, M.]] | ||
| - | [[Category: | + | [[Category: Carboxylic ester hydrolase]] |
| - | [[Category: | + | [[Category: Enzyme]] |
| - | [[Category: | + | [[Category: Hydrolase]] |
| - | [[Category: | + | [[Category: Mutant]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May 2 23:14:03 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 20:14, 2 May 2008
CARBOXYLIC ESTER HYDROLASE, SINGLE MUTANT D49E COORDINATED TO CALCIUM
Overview
Crystal structures of the active-site mutants D99A and H48Q and the calcium-loop mutant D49E of bovine phospholipase A2 have been determined at around 1.9 A resolution. The D99A mutant is isomorphous to the orthorhombic recombinant enzyme, space group P212121. The H48Q and the calcium-loop mutant D49E are isomorphous to the trigonal recombinant enzyme, space group P3121. The two active-site mutants show no major structural perturbations. The structural water is absent in D99A and, therefore, the hydrogen-bonding scheme is changed. In H48Q, the catalytic water is present and hydrogen bonded to Gln48 N, but the second water found in native His48 is absent. In the calcium-loop mutant D49E, the two water molecules forming the pentagonal bipyramid around calcium are absent and only one O atom of the Glu49 carboxylate group is coordinated to calcium, resulting in only four ligands.
About this Structure
1KVY is a Single protein structure of sequence from Bos taurus. Full crystallographic information is available from OCA.
Reference
Structures of the catalytic site mutants D99A and H48Q and the calcium-loop mutant D49E of phospholipase A2., Sekar K, Biswas R, Li Y, Tsai M, Sundaralingam M, Acta Crystallogr D Biol Crystallogr. 1999 Feb;55(Pt 2):443-7. PMID:10089353 Page seeded by OCA on Fri May 2 23:14:03 2008
