4W64

Hcp1 protein from Acinetobacter baumannii AB0057


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Crystal Structure of Hcp from Acinetobacter baumannii: A Component of the Type VI Secretion System.

Ruiz, F.M.Santillana, E.Spinola-Amilibia, M.Torreira, E.Culebras, E.Romero, A.

(2015) Plos One 10: e0129691-e0129691

  • DOI: 10.1371/journal.pone.0129691

  • PubMed Abstract: 
  • The type VI secretion system (T6SS) is a bacterial macromolecular machine widely distributed in Gram-negative bacteria, which transports effector proteins into eukaryotic host cells or other bacteria. Membrane complexes and a central tubular structur ...

    The type VI secretion system (T6SS) is a bacterial macromolecular machine widely distributed in Gram-negative bacteria, which transports effector proteins into eukaryotic host cells or other bacteria. Membrane complexes and a central tubular structure, which resembles the tail of contractile bacteriophages, compose the T6SS. One of the proteins forming this tube is the hemolysin co-regulated protein (Hcp), which acts as virulence factor, as transporter of effectors and as a chaperone. In this study, we present the structure of Hcp from Acinetobacter baumannii, together with functional and oligomerization studies. The structure of this protein exhibits a tight β barrel formed by two β sheets and flanked at one side by a short α-helix. Six Hcp molecules associate to form a donut-shaped hexamer, as observed in both the crystal structure and solution. These results emphasize the importance of this oligomerization state in this family of proteins, despite the low similarity of sequence among them. The structure presented in this study is the first one for a protein forming part of a functional T6SS from A. baumannii. These results will help us to understand the mechanism and function of this secretion system in this opportunistic nosocomial pathogen.


    Organizational Affiliation

    Department of Chemical and Physical Biology, Centro de Investigaciones Biológicas-CSIC, Madrid, Spain.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Type VI secretion system effector, Hcp1 family
A, B, C
171Acinetobacter baumannii (strain AB0057)Mutation(s): 0 
Find proteins for A0A0M3KKY9 (Acinetobacter baumannii (strain AB0057))
Go to UniProtKB:  A0A0M3KKY9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A, B, C
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.168 
  • Space Group: P 6
Unit Cell:
Length (Å)Angle (°)
a = 87.001α = 90.00
b = 87.001β = 90.00
c = 128.809γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-08-20 
  • Released Date: 2015-07-01 
  • Deposition Author(s): Ruiz, F.M., Romero, A.

Revision History 

  • Version 1.0: 2015-07-01
    Type: Initial release