PMID: 11959140 , Related PDB ids: 1B6T, 1EJ2, 1F9A, 1GZU, 1HYB, 1K4K, 1K4M, 1KAM, 1KAQ, 1KKU, 1KQN, 1KQO, 1KR2

Authors:

Werner E, Ziegler M, Lerner F, Schweiger M, Heinemann U

Title:

Crystal structure of human nicotinamide mononucleotide adenylyltransferase in complex with NMN.

Journal:

FEBS Lett. 2002 Apr 10;516(1-3):239-44.

Abstract:

The final step in the biosynthesis of nicotinamide-adenine dinucleotide, a major coenzyme in cellular redox reactions and involved in intracellular signaling, is catalyzed by the enzyme nicotinamide mononucleotide adenylyltransferase (NMNAT). The X-ray structure of human NMNAT in complex with nicotinamide mononucleotide was solved by the single-wavelength anomalous dispersion method at a resolution of 2.9 A. Human NMNAT is a symmetric hexamer whose subunit is formed by a large six-stranded parallel beta-sheet with helices on both sides. Human NMNAT displays a different oligomerization compared to the archaeal enzyme. The protein-nicotinamide mononucleotide interaction pattern provides insight into ligand binding in the human enzyme.