Structural highlights
Function
TRAM1_ECOLI Conjugative DNA transfer (CDT) is the unidirectional transfer of ssDNA plasmid from a donor to a recipient cell. It is the central mechanism by which antibiotic resistance and virulence factors are propagated in bacterial populations. Part of the relaxosome, which facilitates a site- and strand-specific cut in the origin of transfer by TraI, at the nic site. Cooperatively binds 3 regions in the F plasmid oriT locus; 2 are required for autoregulation while the other is required for plasmid transfer. Bends oriT DNA less than 50 degrees. Plasmid specificity is conferred by the TraD-TraM pair.[1] [2] [3] [4]
References
- ↑ Di Laurenzio L, Frost LS, Paranchych W. The TraM protein of the conjugative plasmid F binds to the origin of transfer of the F and ColE1 plasmids. Mol Microbiol. 1992 Oct;6(20):2951-9. PMID:1479887
- ↑ Penfold SS, Simon J, Frost LS. Regulation of the expression of the traM gene of the F sex factor of Escherichia coli. Mol Microbiol. 1996 May;20(3):549-58. PMID:8736534
- ↑ Fekete RA, Frost LS. Characterizing the DNA contacts and cooperative binding of F plasmid TraM to its cognate sites at oriT. J Biol Chem. 2002 May 10;277(19):16705-11. Epub 2002 Mar 1. PMID:11875064 doi:http://dx.doi.org/10.1074/jbc.M111682200
- ↑ Ragonese H, Haisch D, Villareal E, Choi JH, Matson SW. The F plasmid-encoded TraM protein stimulates relaxosome-mediated cleavage at oriT through an interaction with TraI. Mol Microbiol. 2007 Feb;63(4):1173-84. PMID:17238924 doi:http://dx.doi.org/10.1111/j.1365-2958.2006.05576.x
