NDLI: Among Multiple Phosphomannomutase Gene Orthologues, Only One Gene Encodes a Protein with Phosphoglucomutase and Phosphomannomutase Activities in Thermococcus kodakaraensis

Content Provider	PubMed Central
Author	Rashid, Naeem Kanai, Tamotsu Atomi, Haruyuki Imanaka, Tadayuki
Copyright Year	2004
Abstract	Four orthologous genes (TK1108, TK1404, TK1777, and TK2185) that can be annotated as phosphomannomutase (PMM) genes (COG1109) have been identified in the genome of the hyperthermophilic archaeon Thermococcus kodakaraensis KOD1. We previously found that TK1777 actually encodes a phosphopentomutase. In order to determine which of the remaining three orthologues encodes a phosphoglucomutase (PGM), we examined the PGM activity in T. kodakaraensis cells and identified the gene responsible for this activity. Heterologous gene expression and purification and characterization of the recombinant protein indicated that TK1108 encoded a protein with high levels of PGM activity (690 U mg−1), along with high levels of PMM activity (401 U mg−1). Similar analyses of the remaining two orthologues revealed that their protein products exhibited neither PGM nor PMM activity. PGM activity and transcription of TK1108 in T. kodakaraensis were found to be higher in cells grown on starch than in cells grown on pyruvate. Our results clearly indicate that, among the four PMM gene orthologues in T. kodakaraensis, only one gene, TK1108, actually encodes a protein with PGM and PMM activities.
Related Links	http://dx.doi.org/10.1128/jb.186.18.6070-6076.2004
Ending Page	6076
Page Count	7
Starting Page	6070
File Format	PDF
ISSN	00219193
e-ISSN	10985530
Journal	Journal of Bacteriology
Issue Number	18
Volume Number	186
Language	English
Publisher	American Society for Microbiology
Publisher Date	2004-09-15
Access Restriction	Open
Rights Holder	American Society for Microbiology
Subject Keyword	Molecular Biology Microbiology Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Molecular Biology Microbiology

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