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1N2S

CRYSTAL STRUCTURE OF DTDP-6-DEOXY-L-LYXO-4-HEXULOSE REDUCTASE (RMLD) IN COMPLEX WITH NADH

Replaces:  1KC0
Summary for 1N2S
Entry DOI10.2210/pdb1n2s/pdb
Related1KBZ 1KC1 1KC3
DescriptordTDP-glucose oxidoreductase, MAGNESIUM ION, 1,4-DIHYDRONICOTINAMIDE ADENINE DINUCLEOTIDE, ... (5 entities in total)
Functional Keywordsrossman-fold, sugar-nucleotide-binding domain, oxidoreductase
Biological sourceSalmonella enterica subsp. enterica serovar Typhimurium
Total number of polymer chains1
Total formula weight33401.83
Authors
Blankenfeldt, W.,Kerr, I.D.,Giraud, M.F.,Mcmiken, H.J.,Leonard, G.A.,Whitfield, C.,Messner, P.,Graninger, M.,Naismith, J.H. (deposition date: 2002-10-24, release date: 2002-11-01, Last modification date: 2024-02-14)
Primary citationBlankenfeldt, W.,Kerr, I.D.,Giraud, M.F.,McMiken, H.J.,Leonard, G.A.,Whitfield, C.,Messner, P.,Graninger, M.,Naismith, J.H.
Variation on a Theme of SDR. dTDP-6-Deoxy-L- lyxo-4-Hexulose Reductase (RmlD) Shows a New Mg(2+)-Dependent Dimerization Mode
Structure, 10:773-786, 2002
Cited by
PubMed Abstract: dTDP-6-deoxy-L-lyxo-4-hexulose reductase (RmlD) catalyzes the final step in the conversion of dTDP-D-glucose to dTDP-L-rhamnose in an NAD(P)H- and Mg2+-dependent reaction. L-rhamnose biosynthesis is an antibacterial target. The structure of RmlD from Salmonella enterica serovar Typhimurium has been determined, and complexes with NADH, NADPH, and dTDP-L-rhamnose are reported. RmlD differs from other short chain dehydrogenases in that it has a novel dimer interface that contains Mg2+. Enzyme catalysis involves hydride transfer from the nicotinamide ring of the cofactor to the C4'-carbonyl group of the substrate. The substrate is activated through protonation by a conserved tyrosine. NAD(P)H is bound in a solvent-exposed cleft, allowing facile replacement. We suggest a novel role for the conserved serine/threonine residue of the catalytic triad of SDR enzymes.
PubMed: 12057193
DOI: 10.1016/S0969-2126(02)00770-0
PDB entries with the same primary citation
Experimental method
X-RAY DIFFRACTION (2 Å)
Structure validation

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