5aiw

NMR solution structure of the putative transfer protein TraH from Gram-positive conjugative plasmid pIP501

spinqualitylabelsall models 5aiw Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5aiw is a 1 chain structure with sequence from Enterococcus faecalis EnGen0234. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: Solution NMR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A140UHJ9_ENTFL Publication Abstract from PubMed Untreatable bacterial infections caused by a perpetual increase of antibiotic resistant strains represent a serious threat to human healthcare in the 21(st) century. Conjugative DNA transfer is the most important mechanism for antibiotic resistance and virulence gene dissemination among bacteria and is mediated by a protein complex, known as type IV secretion system (T4SS). The core of the T4SS is a multiprotein complex that spans the bacterial envelope as a channel for macromolecular secretion. We report the NMR structure and functional characterization of the transfer protein TraH encoded by the conjugative Gram-positive broad-host range plasmid pIP501. The structure exhibits a striking similarity to VirB8 proteins of Gram-negative secretion systems where they play an essential role in the scaffold of the secretion machinery. Considering TraM as the first VirB8-like protein discovered in pIP501, TraH represents the second protein affiliated with this family in the respective transfer operon. A markerless traH deletion in pIP501 resulted in a total loss of transfer in Enterococcus faecalis as compared with the pIP501 wild type (wt) plasmid, demonstrating that TraH is essential for pIP501 mediated conjugation. Moreover, oligomerization state and topology of TraH in the native membrane were determined providing insights in molecular organization of a Gram-positive T4SS. VirB8-like protein TraH is crucial for DNA transfer in Enterococcus faecalis.,Fercher C, Probst I, Kohler V, Goessweiner-Mohr N, Arends K, Grohmann E, Zangger K, Meyer NH, Keller W Sci Rep. 2016 Apr 22;6:24643. doi: 10.1038/srep24643. PMID:27103580 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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