2ofq
From Proteopedia
(New page: 200px<br /><applet load="2ofq" size="350" color="white" frame="true" align="right" spinBox="true" caption="2ofq" /> '''NMR Solution Structure of a complex between ...) |
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==Overview== | ==Overview== | ||
| - | Type IV secretion (T4S) systems translocate DNA and protein effectors | + | Type IV secretion (T4S) systems translocate DNA and protein effectors through the double membrane of Gram-negative bacteria. The paradigmatic T4S system in Agrobacterium tumefaciens is assembled from 11 VirB subunits and VirD4. Two subunits, VirB9 and VirB7, form an important stabilizing complex in the outer membrane. We describe here the NMR structure of a complex between the C-terminal domain of the VirB9 homolog TraO (TraO(CT)), bound to VirB7-like TraN from plasmid pKM101. TraO(CT) forms a beta-sandwich around which TraN winds. Structure-based mutations in VirB7 and VirB9 of A. tumefaciens show that the heterodimer interface is conserved. Opposite this interface, the TraO structure shows a protruding three-stranded beta-appendage, and here, we supply evidence that the corresponding region of VirB9 of A. tumefaciens inserts in the membrane and protrudes extracellularly. This complex structure elucidates the molecular basis for the interaction between two essential components of a T4S system. |
==About this Structure== | ==About this Structure== | ||
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[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Bayliss, R.]] | [[Category: Bayliss, R.]] | ||
| - | [[Category: Driscoll, P | + | [[Category: Driscoll, P C.]] |
[[Category: Harris, R.]] | [[Category: Harris, R.]] | ||
[[Category: Waksman, G.]] | [[Category: Waksman, G.]] | ||
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[[Category: trao]] | [[Category: trao]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 18:18:00 2008'' |
Revision as of 16:18, 21 February 2008
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NMR Solution Structure of a complex between the VirB9/VirB7 interaction domains of the pKM101 type IV secretion system
Overview
Type IV secretion (T4S) systems translocate DNA and protein effectors through the double membrane of Gram-negative bacteria. The paradigmatic T4S system in Agrobacterium tumefaciens is assembled from 11 VirB subunits and VirD4. Two subunits, VirB9 and VirB7, form an important stabilizing complex in the outer membrane. We describe here the NMR structure of a complex between the C-terminal domain of the VirB9 homolog TraO (TraO(CT)), bound to VirB7-like TraN from plasmid pKM101. TraO(CT) forms a beta-sandwich around which TraN winds. Structure-based mutations in VirB7 and VirB9 of A. tumefaciens show that the heterodimer interface is conserved. Opposite this interface, the TraO structure shows a protruding three-stranded beta-appendage, and here, we supply evidence that the corresponding region of VirB9 of A. tumefaciens inserts in the membrane and protrudes extracellularly. This complex structure elucidates the molecular basis for the interaction between two essential components of a T4S system.
About this Structure
2OFQ is a Protein complex structure of sequences from Incn plasmid r46. Full crystallographic information is available from OCA.
Reference
NMR structure of a complex between the VirB9/VirB7 interaction domains of the pKM101 type IV secretion system., Bayliss R, Harris R, Coutte L, Monier A, Fronzes R, Christie PJ, Driscoll PC, Waksman G, Proc Natl Acad Sci U S A. 2007 Jan 30;104(5):1673-8. Epub 2007 Jan 23. PMID:17244707
Page seeded by OCA on Thu Feb 21 18:18:00 2008
Categories: Incn plasmid r46 | Protein complex | Bayliss, R. | Driscoll, P C. | Harris, R. | Waksman, G. | Pkm101 | Tran | Trao
