5AIW

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

Summary for 5AIW

• Entry DOI: 10.2210/pdb5aiw/pdb
• NMR Information: BMRB: 26518
• Descriptor: TRAH (1 entity in total)
• Functional Keywords: cell adhesion, bacterial, bacterial conjugation
• Biological source: ENTEROCOCCUS FAECALIS ENGEN0234
• Total number of polymer chains: 1
• Total formula weight: 14914.36

Authors

Meyer, N.H.,Fercher, C.,Zangger, K.,Keller, W. (deposition date: 2015-02-18, release date: 2016-03-09, Last modification date: 2024-06-19)

Primary citation

Fercher, C.,Probst, I.,Kohler, V.,Goessweiner-Mohr, N.,Arends, K.,Grohmann, E.,Zangger, K.,Meyer, N.H.,Keller, W.
Virb8-Like Protein Trah is Crucial for DNA Transfer in Enterococcus Faecalis.
Sci.Rep., 6:24643-, 2016

PubMed Abstract: 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.

PubMed: 27103580
DOI: 10.1038/SREP24643

Experimental method

SOLUTION NMR