These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Expression, purification and properties of shikimate dehydrogenase from Mycobacterium tuberculosis.
    Author: Zhang X, Zhang S, Hao F, Lai X, Yu H, Huang Y, Wang H.
    Journal: J Biochem Mol Biol; 2005 Sep 30; 38(5):624-31. PubMed ID: 16202245.
    Abstract:
    Tuberculosis, caused by Mycobacterium tuberculosis, continues to be one of the main diseases to mankind. It is urgent to discover novel drug targets for appropriate antimicrobial agents against this human pathogen. The shikimate pathway is considered as an attractive target for the discovery of novel antibiotics for its essentiality in bacteria and absence in mammalian cells. The Mycobacterium tuberculosis aroE-encoded shikimate dehydrogenase was cloned, expressed and purified. Sequence alignment analysis shows that shikimate dehydrogenase of Mycobacterium tuberculosis exhibit the pattern of G-X-(N/S)-V-(T/S)-X-PX-K, which is highly conserved within the shikimate dehydrogenase family. The recombinant shikimate dehydrogenase spectrum determined by CD spectroscopy showed that the percentages for alpha-helix, beta-sheet, beta-turn, and random coil were 29.2 %, 9.3 %, 32.7 %, and 28.8 %, respectively. The enzymatic characterization demonstrates that it appears to be fully active at pH from 9.0 to 12, and temperature 63(o)C. The apparent Michaelis constant for shikimic acid and NADP(+) were calculated to be about 29.5 microM and 63 microM. The recombinant shikimate dehydrogenase catalyzes the substrate in the presence of NADP(+) with an enzyme turnover number of 399 s(-1). Zymological studies suggest that the cloned shikimate dehydrogenase from M. tuberculosis has a pretty activity, and the work should help in the discovery of enzyme inhibitors and further of possible antimicrobial agents against Mycobacterium tuberculosis.
    [Abstract] [Full Text] [Related] [New Search]