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The hydrogenases of Geobacter sulfurreducens: a comparative genomic perspective


, : The hydrogenases of Geobacter sulfurreducens: a comparative genomic perspective. Microbiology 151(Pt 4): 1239-1254

The hydrogenase content of the genome of Geobacter sulfurreducens, a member of the family Geobacteraceae within the delta-subdivision of the Proteobacteria, was examined and found to be distinct from that of Desulfovibrio species, another family of delta-Proteobacteria on which extensive research concerning hydrogen metabolism has been conducted. Four [NiFe]-hydrogenases are encoded in the G. sulfurreducens genome: two periplasmically oriented, membrane-bound hydrogenases, Hya and Hyb, and two cytoplasmic hydrogenases, Mvh and Hox. None of these [NiFe]-hydrogenases has a counterpart in Desulfovibrio species. Furthermore, the large and small subunits of Mvh and Hox appear to be related to archaeal and cyanobacterial hydrogenases, respectively. Clusters encoding [Fe]-hydrogenases and periplasmic [NiFeSe]-hydrogenases, which are commonly found in the genomes of Desulfovibrio species, are not present in the genome of G. sulfurreducens. Hydrogen-evolving Ech hydrogenases, which are present in the genomes of at least two Desulfovibrio species, were also absent from the G. sulfurreducens genome, despite the fact that G. sulfurreducens is capable of hydrogen production. Instead, the G. sulfurreducens genome contained a cluster encoding a multimeric (E) under bar ch (h) under bar ydrogenase (r) under bar elated (Ehr) complex that was similar in content to operons encoding Ech hydrogenases, but did not appear to encode a hydrogenase. Phylogenetic analysis revealed that the G. sulfurreducens ehr cluster is part of a family of related clusters found in both the Archaea and Bacteria.

US$19.90

PMID: 15817791

DOI: 10.1099/mic.0.27535-0


Other references

Whiteside, S.P.; Port, J.D.; Abramowitz, J.S., 2004: A meta-analysis of functional neuroimaging in obsessive-compulsive disorder. Recent neurobiological models of obsessive-compulsive disorder (OCD) posit that a dysfunction in orbitofrontal-subcortical circuitry underlies the etiology of this disorder. Much of the empirical support for these theories comes from studies using...

Jain, S.; Chaudhary, S.; Chaudhary, S.K., 1982: Cavernous haemangioma of the ovary-case report. Indian Journal of Pathology & Microbiology 25(1): 85-87

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Matson, D.D.; Crigler, J.F., 1969: Management of craniopharyngioma in childhood. Journal of Neurosurgery 30(4): 377-390

Moreno, J.; Morales, J.; Lobato, E.; Merino, S.; Tomas, G.; Martinez D.L.P.ente, J., 2005: Evidence for the signaling function of egg color in the pied flycatcher Ficedula hypoleuca. A recent hypothesis proposes that the bright colors, especially blue and green, of many avian eggs may function as signals of female or offspring phenotypic quality or condition to males in species with biparental care, inducing them to allocate m...

Pomini, G.; Gribaldo, R.; Bellavere, F.; Lupia, M.; Sale, F.; Rugna, A.; Costa, L.; Molfese, G., 1986: Correlation between QT interval, ventricular arrhythmias and left ventricular function in chronic alcoholics. Prolonged QT interval and arrhythmias have been reported to occur in chronic alcoholics. To investigate the role of chronic alcohol consumption in the onset of arrhythmias and the development of the preclinical left ventricular dysfunction, in a g...

Jellinek, D.; Lynott, C.K.; Rifkin, D.B.; Janjić, N., 1993: High-affinity RNA ligands to basic fibroblast growth factor inhibit receptor binding. We have isolated RNA ligands with low-nanomolar affinity and high specificity to basic fibroblast growth factor from a pool of 10(14) molecules containing 30 randomized positions by the systematic evolution of ligands by exponential enrichment (SE...

Lawrence, George E., 1950: The diving and feeding activity of the western grebe. The patterns of diving behavior of Aechmophorus occidentalis are designated as feeding, springing, alarm, surface and courtship dives. The courtship behavior was observed throughout the entire 5-mo. period from May to Sept., 1947, at Clear Lake, C...