Identification and Characterization of Two Alternative σ Factors of RNA Polymerase in the Deep-Sea Piezophilic Bacterium Shewanella violacea, Strain DSS12

Hiroaki KAWANOExtremobiosphere Research Center (XBR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC);Department of Applied Chemistry, Faculty of Engineering, Toyo University

Hiroyuki TAKAHASHIDepartment of Applied Chemistry, Faculty of Engineering, Toyo University

Fumiyoshi ABEExtremobiosphere Research Center (XBR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

Chiaki KATOExtremobiosphere Research Center (XBR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

Koki HORIKOSHIExtremobiosphere Research Center (XBR), Japan Agency for Marine-Earth Science and Technology (JAMSTEC)

Abstract

Two genes for alternative σ factors, σ^E2 and σ^E3, classified in the extracytoplasmic function σ family for RNA polymerases, were identified in the deep-sea piezophilic bacterium Shewanella violacea DSS12. Amino acid alignments revealed that the domains for transcriptional functions were comparatively conserved compared with Escherichia coli σ^E in both proteins. Core-binding analysis suggested that both proteins function as σ factors.

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Identification and Characterization of Two Alternative σ Factors of RNA Polymerase in the Deep-Sea Piezophilic Bacterium Shewanella violacea, Strain DSS12

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Identification and Characterization of Two Alternative σ Factors of RNA Polymerase in the Deep-Sea Piezophilic Bacterium Shewanella violacea, Strain DSS12

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