3daa
From Proteopedia
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|SITE= <scene name='pdbsite=ASA:Active+Site+A,+Inactivated+By+Phosphopyridoxyl+D-ALA'>ASA</scene> and <scene name='pdbsite=ASB:Active+Site+B,+Inactivated+By+Phosphopyridoxyl+D-ALA'>ASB</scene> | |SITE= <scene name='pdbsite=ASA:Active+Site+A,+Inactivated+By+Phosphopyridoxyl+D-ALA'>ASA</scene> and <scene name='pdbsite=ASB:Active+Site+B,+Inactivated+By+Phosphopyridoxyl+D-ALA'>ASB</scene> | ||
|LIGAND= <scene name='pdbligand=PDD:N-(5'-PHOSPHOPYRIDOXYL)-D-ALANINE'>PDD</scene> | |LIGAND= <scene name='pdbligand=PDD:N-(5'-PHOSPHOPYRIDOXYL)-D-ALANINE'>PDD</scene> | ||
| - | |ACTIVITY= [http://en.wikipedia.org/wiki/D-amino-acid_transaminase D-amino-acid transaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.6.1.21 2.6.1.21] | + | |ACTIVITY= <span class='plainlinks'>[http://en.wikipedia.org/wiki/D-amino-acid_transaminase D-amino-acid transaminase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.6.1.21 2.6.1.21] </span> |
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3daa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3daa OCA], [http://www.ebi.ac.uk/pdbsum/3daa PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=3daa RCSB]</span> | ||
}} | }} | ||
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[[Category: Peisach, D.]] | [[Category: Peisach, D.]] | ||
[[Category: Ringe, D.]] | [[Category: Ringe, D.]] | ||
| - | [[Category: PDD]] | ||
[[Category: aminotransferase]] | [[Category: aminotransferase]] | ||
[[Category: pyridoxal phosphate]] | [[Category: pyridoxal phosphate]] | ||
[[Category: transaminase]] | [[Category: transaminase]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 05:32:55 2008'' |
Revision as of 02:32, 31 March 2008
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| , resolution 1.9Å | |||||||
|---|---|---|---|---|---|---|---|
| Sites: | and | ||||||
| Ligands: | |||||||
| Activity: | D-amino-acid transaminase, with EC number 2.6.1.21 | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
CRYSTALLOGRAPHIC STRUCTURE OF D-AMINO ACID AMINOTRANSFERASE INACTIVATED BY PYRIDOXYL-D-ALANINE
Overview
The three-dimensional structures of two forms of the D-amino acid aminotransferase (D-aAT) from Bacillus sp. YM-1 have been determined crystallographically: the pyridoxal phosphate (PLP) form and a complex with the reduced analogue of the external aldimine, N-(5'-phosphopyridoxyl)-d-alanine (PPDA). Together with the previously reported pyridoxamine phosphate form of the enzyme [Sugio et al. (1995) Biochemistry 34, 9661], these structures allow us to describe the pathway of the enzymatic reaction in structural terms. A major determinant of the enzyme's stereospecificity for D-amino acids is a group of three residues (Tyr30, Arg98, and His100, with the latter two contributed by the neighboring subunit) forming four hydrogen bonds to the substrate alpha-carboxyl group. The replacement by hydrophobic groups of the homologous residues of the branched chain L-amino acid aminotransferase (which has a similar fold) could explain its opposite stereospecificity. As in L-aspartate aminotransferase (L-AspAT), the cofactor in D-aAT tilts (around its phosphate group and N1 as pivots) away from the catalytic lysine 145 and the protein face in the course of the reaction. Unlike L-AspAT, D-aAT shows no other significant conformational changes during the reaction.
About this Structure
3DAA is a Single protein structure of sequence from Bacillus sp.. Full crystallographic information is available from OCA.
Reference
Crystallographic study of steps along the reaction pathway of D-amino acid aminotransferase., Peisach D, Chipman DM, Van Ophem PW, Manning JM, Ringe D, Biochemistry. 1998 Apr 7;37(14):4958-67. PMID:9538014
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