4RY2

Crystal structure of the peptidase-containing ABC transporter PCAT1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.611 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.266 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Crystal structures of a polypeptide processing and secretion transporter.

Lin, D.Y.Huang, S.Chen, J.

(2015) Nature 523: 425-430

  • DOI: 10.1038/nature14623
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Bacteria secrete peptides and proteins to communicate, to poison competitors, and to manipulate host cells. Among the various protein-translocation machineries, the peptidase-containing ATP-binding cassette transporters (PCATs) are appealingly simple ...

    Bacteria secrete peptides and proteins to communicate, to poison competitors, and to manipulate host cells. Among the various protein-translocation machineries, the peptidase-containing ATP-binding cassette transporters (PCATs) are appealingly simple. Each PCAT contains two peptidase domains that cleave the secretion signal from the substrate, two transmembrane domains that form a translocation pathway, and two nucleotide-binding domains that hydrolyse ATP. In Gram-positive bacteria, PCATs function both as maturation proteases and exporters for quorum-sensing or antimicrobial polypeptides. In Gram-negative bacteria, PCATs interact with two other membrane proteins to form the type 1 secretion system. Here we present crystal structures of PCAT1 from Clostridium thermocellum in two different conformations. These structures, accompanied by biochemical data, show that the translocation pathway is a large α-helical barrel sufficient to accommodate small folded proteins. ATP binding alternates access to the transmembrane pathway and also regulates the protease activity, thereby coupling substrate processing to translocation.


    Organizational Affiliation

    1] Laboratory of Membrane Biology and Biophysics, The Rockefeller University, 1230 York Avenue, New York, New York 10065, USA [2] Howard Hughes Medical Institute, 1230 York Avenue, New York, New York 10065, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ABC-type bacteriocin transporter
A, B
730Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372)Mutation(s): 0 
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
Peptidase-containing ABC transporter (PCAT)
Find proteins for A3DCU1 (Clostridium thermocellum (strain ATCC 27405 / DSM 1237 / NBRC 103400 / NCIMB 10682 / NRRL B-4536 / VPI 7372))
Go to UniProtKB:  A3DCU1
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.611 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.266 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 87.590α = 90.00
b = 89.730β = 90.00
c = 296.590γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
HKL-2000data collection
HKL-2000data scaling
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-22
    Type: Initial release
  • Version 1.1: 2015-08-05
    Type: Database references