Crystal structure of NAD-dependent malate dehydrogenase complexed with NADP(H)Tomita, T., Fushinobu, S., Kuzuyama, T., Nishiyama, M.
(2005) Biochem.Biophys.Res.Commun. 334: 613-618
- PubMed: 16009341
- DOI: 10.1016/j.bbrc.2005.06.133
- Primary Citation of Related Structures:
- PubMed Abstract:
- Refined crystal structure of cytoplasmic malate dehydrogenase at 2.5-A resolution
Birktoft, J.J.,Rhodes, G.,Banaszak, L.J.
(1989) Biochemistry 28: 6065
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(1993) Biochemistry 32: 3913
- Preliminary X-ray diffraction analysis of a crystallizable mutant of malate dehydrogenase from the thermophile Thermus flavus
Kelly, C.A.,Sarfaty, S.,Nishiyama, M.,Beppu, T.,Birktoft, J.J.
(1991) J.Mol.Biol. 221: 383
- The presence of a histidine-aspartic acid pair in the active site of 2-hydroxyacid dehydrogenases. X-ray refinement of cytoplasmic malate dehydrogenase
Birktoft, J.J.,Banaszak, L.J.
(1983) J.Biol.Chem. 258: 472
- Malate Dehydrogenases
Banaszak, L.J.,Bradshaw, R.A.
(1975) Enzyme 11: 369
For better understanding of the coenzyme specificity in NAD-dependent MDH (tMDH) from Thermus flavus AT-62, we determined the crystal structures of tMDH-NADP(H) complex at maximally 1.65 A resolution. The overall structure is almost the same as that ...
For better understanding of the coenzyme specificity in NAD-dependent MDH (tMDH) from Thermus flavus AT-62, we determined the crystal structures of tMDH-NADP(H) complex at maximally 1.65 A resolution. The overall structure is almost the same as that of the tMDH-NADH complex. However, NADP(H) binds to tMDH in the reverse orientation, where adenine occupies the position near the catalytic center and nicotinamide is positioned at the adenine binding site of the tMDH-NADH complex. Consistent with this, kinetic analysis of the malate-oxidizing reaction revealed that NADP(+) inhibited tMDH at high concentrations. This has provided the first evidence for the alternative binding mode of the nicotinamide coenzyme, that has pseudo-symmetry in its structure, in a single enzyme.
Biotechnology Research Center, The University of Tokyo, Bunkyo-ku, Tokyo 113-8657, Japan.