1DAA image
Entry Detail
PDB ID:
1DAA
Title:
CRYSTALLOGRAPHIC STRUCTURE OF D-AMINO ACID AMINOTRANSFERASE COMPLEXED WITH PYRIDOXAL-5'-PHOSPHATE
Biological Source:
Source Organism:
PDB Version:
Deposition Date:
1995-06-09
Release Date:
1995-09-15
Method Details:
Experimental Method:
Resolution:
1.94 Å
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 1 21 1
Macromolecular Entities
Polymer Type:polypeptide(L)
Description:D-AMINO ACID AMINOTRANSFERASE
Chain IDs:A, B
Chain Length:282
Number of Molecules:2
Biological Source:Bacillus sp.
Ligand Molecules
Primary Citation
Crystal structure of a D-amino acid aminotransferase: how the protein controls stereoselectivity.
Biochemistry 34 9661 9669 (1995)
PMID: 7626635 DOI: 10.1021/bi00030a002

Abstact

The three-dimensional structure of D-amino acid aminotransferase (D-AAT) in the pyridoxamine phosphate form has been determined crystallographically. The fold of this pyridoxal phosphate (PLP)-containing enzyme is completely different from those of any of the other enzymes that utilize PLP as part of their mechanism and whose structures are known. However, there are some striking similarities between the active sites of D-AAT and the corresponding enzyme that transaminates L-amino acids, L-aspartate aminotransferase. These similarities represent convergent evolution to a common solution of the problem of enforcing transamination chemistry on the PLP cofactor. Implications of these similarities are discussed in terms of their possible roles in the stabilization of intermediates of a transamination reaction. In addition, sequence similarity between D-AAT and branched chain L-amino acid aminotransferase suggests that this latter enzyme will also have a fold similar to that of D-AAT.

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Primary Citation of related structures