TY - JOUR
T1 - Structure and mechanism of glutamate racemase from Aquifex pyrophilus
AU - Kwang Yeon Hwang, Yeon Hwang
AU - Cho, C. S.
AU - Sang Suk Kim, Suk Kim
AU - Sung, H. C.
AU - Yeon Gyu Yu, Gyu Yu
AU - Cho, Y.
N1 - Funding Information:
We thank S.-H. Kim, T. Earnest and L.-W. Huang for help during data collection on the ALS (LBNL; Berkeley), and M. Tanner (UBC, Vancouver, BC) and J.-H. Yu (KIST) for helpful comments and critical reading of the manuscript. The Macromolecular Crystallography facility at beamline 5.0.2 in the ALS is principally funded by the Office of Biological and Environmental Research (US Department of Energy), with contributions from LBNL, Amgen, Roche Biosciences, the University of California (Berkeley), and Lawrence Livermore National Laboratory. This work was supported by the KIST (KIST 2000 program), MOST (Biotech 2000 program) and KAST (young scientist award to Y.C.).
PY - 1999
Y1 - 1999
N2 - Glutamate racemase (MurI) is responsible for the synthesis of D- glutamate, an essential building block of the peptidoglycan layer in bacterial cell walls. The crystal structure of glutamate racemase from Aquifex pyrophilus, determined at 2.3 Å resolution, reveals that the enzyme forms a dimer and each monomer consists of two α/β fold domains, a unique structure that has not been observed in other racemases or members of an enolase superfamily. A substrate analog, D-glutamine, binds to the deep pocket formed by conserved residues from two monomers. The structural and mutational analyses allow us to propose a mechanism of metal cofactor- independent glutamate racemase in which two cysteine residues are involved in catalysis.
AB - Glutamate racemase (MurI) is responsible for the synthesis of D- glutamate, an essential building block of the peptidoglycan layer in bacterial cell walls. The crystal structure of glutamate racemase from Aquifex pyrophilus, determined at 2.3 Å resolution, reveals that the enzyme forms a dimer and each monomer consists of two α/β fold domains, a unique structure that has not been observed in other racemases or members of an enolase superfamily. A substrate analog, D-glutamine, binds to the deep pocket formed by conserved residues from two monomers. The structural and mutational analyses allow us to propose a mechanism of metal cofactor- independent glutamate racemase in which two cysteine residues are involved in catalysis.
UR - http://www.scopus.com/inward/record.url?scp=0032915050&partnerID=8YFLogxK
U2 - 10.1038/8223
DO - 10.1038/8223
M3 - Article
C2 - 10331867
AN - SCOPUS:0032915050
VL - 6
SP - 422
EP - 426
JO - Nature Structural and Molecular Biology
JF - Nature Structural and Molecular Biology
SN - 1545-9993
IS - 5
ER -