3d8a

From Proteopedia

(Difference between revisions)

Revision as of 06:45, 7 August 2019

Co-crystal structure of TraM-TraD complex.

Structural highlights

3d8a is a 16 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Related:	2g7o
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

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]

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

F plasmid-mediated bacterial conjugation requires interactions between a relaxosome component, TraM, and the coupling protein TraD, a hexameric ring ATPase that forms the cytoplasmic face of the conjugative pore. Here we present the crystal structure of the C-terminal tail of TraD bound to the TraM tetramerization domain, the first structural evidence of relaxosome-coupling protein interactions. The structure reveals the TraD C-terminal peptide bound to each of four symmetry-related grooves on the surface of the TraM tetramer. Extensive protein-protein interactions were observed between the two proteins. Mutational analysis indicates that these interactions are specific and required for efficient F conjugation in vivo. Our results suggest that specific interactions between the C-terminal tail of TraD and the TraM tetramerization domain might lead to more generalized interactions that stabilize the relaxosome-coupling protein complex in preparation for conjugative DNA transfer.

Structural basis of specific TraD-TraM recognition during F plasmid-mediated bacterial conjugation.,Lu J, Wong JJ, Edwards RA, Manchak J, Frost LS, Glover JN Mol Microbiol. 2008 Oct;70(1):89-99. Epub 2008 Aug 19. PMID:18717787^[5]

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

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
↑ Lu J, Wong JJ, Edwards RA, Manchak J, Frost LS, Glover JN. Structural basis of specific TraD-TraM recognition during F plasmid-mediated bacterial conjugation. Mol Microbiol. 2008 Oct;70(1):89-99. Epub 2008 Aug 19. PMID:18717787 doi:10.1111/j.1365-2958.2008.06391.x

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3d8a"

@@ Line 1: / Line 1: @@
 ==Co-crystal structure of TraM-TraD complex.==
-<StructureSection load='3d8a' size='340' side='right' caption='[[3d8a]], [[Resolution|resolution]] 2.55&Aring;' scene=''>
+<StructureSection load='3d8a' size='340' side='right'caption='[[3d8a]], [[Resolution|resolution]] 2.55&Aring;' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[3d8a]] is a 16 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3D8A OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3D8A FirstGlance]. <br>
@@ Line 13: / Line 13: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/d8/3d8a_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/d8/3d8a_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 32: / Line 32: @@
 __TOC__
 </StructureSection>
+[[Category: Large Structures]]
 [[Category: Edwards, R A]]
 [[Category: Glover, J N.M]]

3d8a

From Proteopedia

Revision as of 06:45, 7 August 2019

Co-crystal structure of TraM-TraD complex.

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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