Article
Glutamine-dependent NAD+ synthetase. How a two-domain, three-substrate enzyme avoids waste.
The Journal of biological chemistry - 3 Nov 2006
Wojcik Marzena, Seidle Heather F, Bieganowski Pawel, Brenner Charles
Abstract excerpt
Glutamine-dependent NAD(+) synthetase, Qns1, utilizes a glutamine aminotransferase domain to supply ammonia for amidation of nicotinic acid adenine dinucleotide (NaAD(+)) to NAD(+). Earlier characterization of Qns1 suggested that glutamine consumption exceeds NAD(+) production by 40%. To explore whether Qns1 is systematically wasteful or whether additional features account for this behavior, we performed a...
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