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Acta Crystallogr Sect F Struct Biol Cryst Commun. May 1, 2007; 63(Pt 5): 375–377.
Published online Apr 6, 2007. doi:  10.1107/S1744309107006069
PMCID: PMC2335003
Crystallization of human nicotinamide phosphoribosyltransferase
Ryo Takahashi,a Shota Nakamura,a Takuya Yoshida,a Yuji Kobayashi,ab and Tadayasu Ohkuboa*
aGraduate School of Pharmaceutical Sciences, Osaka University, 1-6 Yamadaoka, Suita, Osaka 565-0871, Japan
bOsaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan
Correspondence e-mail: ohkubo/at/
Received December 13, 2006; Accepted February 5, 2007.
In the NAD biosynthetic pathway, nicotinamide phosphoribosyltransferase (NMPRTase; EC plays an important role in catalyzing the synthesis of nicotinamide mononucleotide from nicotinamide and 5′-phosphoribosyl-1′-­pyrophosphate. Because the diffraction pattern of the initally obtained crystals was not suitable for structure analysis, the crystal quality was improved by successive use of the microseeding technique. The resultant crystals diffracted to 2.0 Å resolution. These crystals belonged to space group P21, with unit-cell parameters a = 60.56, b = 106.40, c = 82.78 Å. Here, the crystallization of human NMPRTase is reported in the free form; the crystals should be useful for inhibitor-soaking experiments on the enzyme.
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