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Publication Abstract from PubMed

Several archaeal mechanosensitive (MS) channels have been reported, including one from Thermoplasma volcanium designated MscTV. Here, we report the crystal structure of MscTV at 1.6-A resolution. Unexpectedly, MscTV was found to be a water-soluble protein exhibiting a winged helix-turn-helix (wHTH) motif, which is the signature of the MarR (multiple antibiotic resistance regulator) family of transcriptional regulators. A cell-based osmotic downshock functional assay demonstrated that MscTV was unable to protect a knockout strain of Escherichia coli from hypoosmotic shock, further indicating that it does not function as a MS channel. We propose this protein be renamed MLPTv for MarR-like protein from T. volcanium.

A reported archaeal mechanosensitive channel is a structural homolog of MarR-like transcriptional regulators.,Liu Z, Walton TA, Rees DC Protein Sci. 2010 Apr;19(4):808-14. PMID:20162616^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.