2N01

NMR structure of VirB9 C-terminal domain in complex with VirB7 N-terminal domain from Xanthomonas citri's T4SS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

VirB7 and VirB9 Interactions Are Required for the Assembly and Antibacterial Activity of a Type IV Secretion System.

Oliveira, L.C.Souza, D.P.Oka, G.U.Lima, F.D.Oliveira, R.J.Favaro, D.C.Wienk, H.Boelens, R.Farah, C.S.Salinas, R.K.

(2016) Structure 24: 1707-1718

  • DOI: 10.1016/j.str.2016.07.015

  • PubMed Abstract: 
  • The type IV secretion system (T4SS) from the phytopathogen Xanthomonas citri (Xac) is a bactericidal nanomachine. The T4SS core complex is a ring composed of multiple copies of VirB7-VirB9-VirB10 subunits. Xac-VirB7 contains a disordered N-terminal t ...

    The type IV secretion system (T4SS) from the phytopathogen Xanthomonas citri (Xac) is a bactericidal nanomachine. The T4SS core complex is a ring composed of multiple copies of VirB7-VirB9-VirB10 subunits. Xac-VirB7 contains a disordered N-terminal tail (VirB7NT) that recognizes VirB9, and a C-terminal domain (VirB7CT) involved in VirB7 self-association. Here, we show that VirB7NT forms a short β strand upon binding to VirB9 and stabilizes it. A tight interaction between them is essential for T4SS assembly and antibacterial activity. Abolishing VirB7 self-association or deletion of the VirB7 C-terminal domain impairs this antibacterial activity without disturbing T4SS assembly. These findings reveal protein interactions within the core complex that are critical for the stability and activity of a T4SS.


    Organizational Affiliation

    Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, São Paulo 05508-000, Brazil.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
VirB7 protein
A
25Xanthomonas axonopodis pv. citri (strain 306)N/A
Find proteins for Q8PJB3 (Xanthomonas axonopodis pv. citri (strain 306))
Go to UniProtKB:  Q8PJB3
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
VirB9 protein
B
106Xanthomonas axonopodis pv. citri (strain 306)Gene Names: virB9
Find proteins for Q8PJB5 (Xanthomonas axonopodis pv. citri (strain 306))
Go to UniProtKB:  Q8PJB5
Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A
NON-POLYMERH2 N

--

ACE
Query on ACE
A
NON-POLYMERC2 H4 O

--

Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 100 
  • Conformers Submitted: 20 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-09-09
    Type: Initial release
  • Version 1.1: 2016-10-12
    Type: Database references
  • Version 1.2: 2016-10-19
    Type: Database references