Structural analysis of the transcriptional regulator homolog protein from Pyrococcus horikoshii OT3

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概要

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• PH1061 is a hypothetical protein of 100 residues (11.4 kDa) from the 1hyperthermophilic archaebacterium, Pyrococcus horikoshii OT3 , and is conserved among many archaeal and bacterial organisms. Although the functions in these 2organisms are still unknown, a Pfam database search revealed that PH1061 has a helix-turn-helix (HTH) motif (“HTH_5 motif” in the Pfam database), and suggested that 3it is a DNA-binding protein, like members of the ArsR family . ArsR is a transcriptional repressor of the arsenic resistance operon in Escherichia coli and other members of this 4family involve zinc-sensing transcriptional repressors, such as CzrA from 5Staphylococcus aureus and SmtB from Synechococcus pcc7942. The primary sequence similarities to PH1061 are 20%, 21%, and 6.6% with ArsR, CzrA, and SmtB, respectively. There are 10 proteins with the HTH_5 motif in P. horikoshii, but none of their functions are known. For structure-based functional analysis, the three-dimensional structure of PH1061 was determined at a resolution of 2.05 A using the multi-wavelength anomalous diffraction (MAD) method.

• Wiley-Lissの論文

著者

• Yao Min

  Faculty Of Adv. Life Sci. Hokkaido Univ.

• Sakai Naoki

  Faculty Of Advanced Life Sciences Hokkaido University

• Watanabe Nobuhisa

  Faculty Of Adv. Life Sci. Hokkaido Univ.

• Tanaka Isao

  Graduate School Of Life Science Hokkaido University

• Yao Min

  Graduate School Of Life Science Hokkaido University

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