The MTCY428.08 Gene of Mycobacterium tuberculosis Codes for NAD + Synthetase

Abstract
The product of the MTCY428.08 gene of Mycobacterium tuberculosis shows sequence homology with several NAD + synthetases. The MTCY428.08 gene was cloned into the expression vectors pGEX-4T-1 and pET-15b. Expression in Escherichia coli led to overproduction of glutathione S -transferase fused and His 6 -tagged gene products, which were enzymatically assayed for NAD synthetase activity. Our results demonstrate that the MTCY428.08 gene of M. tuberculosis is the structural gene for NAD + synthetase.