4G4P

Crystal structure of glutamine-binding protein from Enterococcus faecalis at 1.5 A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.115 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Functional Diversity of Tandem Substrate-Binding Domains in ABC Transporters from Pathogenic Bacteria.

Fulyani, F.Schuurman-Wolters, G.K.Zagar, A.V.Guskov, A.Slotboom, D.J.Poolman, B.

(2013) Structure 21: 1879-1888

  • DOI: 10.1016/j.str.2013.07.020
  • Primary Citation of Related Structures:  4KPT, 4KQP, 4KR5, 4LA9

  • PubMed Abstract: 
  • The ATP-binding cassette (ABC) transporter GlnPQ is an essential uptake system for amino acids in gram-positive pathogens and related nonpathogenic bacteria. The transporter has tandem substrate-binding domains (SBDs) fused to each transmembrane doma ...

    The ATP-binding cassette (ABC) transporter GlnPQ is an essential uptake system for amino acids in gram-positive pathogens and related nonpathogenic bacteria. The transporter has tandem substrate-binding domains (SBDs) fused to each transmembrane domain, giving rise to four SBDs per functional transporter complex. We have determined the crystal structures and ligand-binding properties of the SBDs of GlnPQ from Enterococcus faecalis, Streptococcus pneumoniae, and Lactococcus lactis. The tandem SBDs differ in substrate specificity and affinity, allowing cells to efficiently accumulate different amino acids via a single ABC transporter. The combined structural, functional, and thermodynamic analysis revealed the roles of individual residues in determining the substrate affinity. We succeeded in converting a low-affinity SBD into a high-affinity receptor and vice versa. Our data indicate that a small number of residues that reside in the binding pocket constitute the major affinity determinants of the SBDs.


    Organizational Affiliation

    Department of Biochemistry, Groningen Biomolecular Sciences and Biotechnology Institute, Netherlands Proteomics Centre and Zernike Institute for Advanced Materials, University of Groningen, Nijenborgh 4, 9747 AG Groningen, the Netherlands.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Amino acid ABC transporter, amino acid-binding/permease protein
A
244Enterococcus faecalis (strain ATCC 700802 / V583)N/A
Find proteins for Q837S0 (Enterococcus faecalis (strain ATCC 700802 / V583))
Go to UniProtKB:  Q837S0
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLN
Query on GLN

Download SDF File 
Download CCD File 
A
GLUTAMINE
C5 H10 N2 O3
ZDXPYRJPNDTMRX-VKHMYHEASA-N
 Ligand Interaction
MES
Query on MES

Download SDF File 
Download CCD File 
A
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
GLNKd: 130 nM BINDINGMOAD
GLNKd: 130 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.155 
  • R-Value Work: 0.115 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 40.730α = 90.00
b = 61.130β = 99.05
c = 45.120γ = 90.00
Software Package:
Software NamePurpose
XDSdata reduction
PHASERphasing
SCALAdata scaling
MXdata collection
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-07-17
    Type: Initial release
  • Version 1.1: 2013-09-11
    Type: Database references
  • Version 1.2: 2013-10-30
    Type: Database references