5XU1

Structure of a non-canonical ABC transporter from Streptococcus pneumoniae R6


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of a MacAB-like efflux pump from Streptococcus pneumoniae.

Yang, H.B.Hou, W.T.Cheng, M.T.Jiang, Y.L.Chen, Y.Zhou, C.Z.

(2018) Nat Commun 9: 196-196

  • DOI: 10.1038/s41467-017-02741-4
  • Primary Citation of Related Structures:  
    5XU1, 5XU0

  • PubMed Abstract: 
  • The spr0693-spr0694-spr0695 operon of Streptococcus pneumoniae encodes a putative ATP-binding cassette (ABC)-type efflux pump involved in the resistance of antibiotics and antimicrobial peptides. Here we report the crystal structures of Spr0694-0695 ...

    The spr0693-spr0694-spr0695 operon of Streptococcus pneumoniae encodes a putative ATP-binding cassette (ABC)-type efflux pump involved in the resistance of antibiotics and antimicrobial peptides. Here we report the crystal structures of Spr0694-0695 at 3.3 Å and Spr0693 at 3.0 Å resolution, revealing a MacAB-like efflux pump. The dimeric Spr0694-0695 adopts a non-canonical fold of ABC transporter, the transmembrane domain of which consists of eight tightly packed transmembrane helices with an insertion of extracellular domain between the first and second helices, whereas Spr0693 forms a nanotube channel docked onto the ABC transporter. Structural analyses combined with ATPase activity and antimicrobial susceptibility assays, enable us to propose a putative substrate-entrance tunnel with a lateral access controlled by a guard helix. Altogether, our findings provide structural insights and putative transport mechanism of a MacAB-like efflux pump in Gram-positive bacteria.


    Organizational Affiliation

    Key Laboratory of Structural Biology, Chinese Academy of Science, Hefei, Anhui, 230027, People's Republic of China. zcz@ustc.edu.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ABC transporter ATP-binding proteinAB245Streptococcus pneumoniae R6Mutation(s): 0 
Gene Names: ABC-NBDspr0694
Find proteins for Q8DQF8 (Streptococcus pneumoniae (strain ATCC BAA-255 / R6))
Explore Q8DQF8 
Go to UniProtKB:  Q8DQF8
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
ABC transporter permeaeMS419Streptococcus pneumoniae R6Mutation(s): 0 
Gene Names: spr0695
Membrane protein
Mpstruc
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
ATP Binding Cassette (ABC) Transporters
Protein: 
MacAB-like efflux pump, Spr0694-0695 section
Find proteins for Q8DQF7 (Streptococcus pneumoniae (strain ATCC BAA-255 / R6))
Explore Q8DQF7 
Go to UniProtKB:  Q8DQF7
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download CCD File 
A, B
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.289 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.236 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 141.053α = 90
b = 154.987β = 90
c = 205.892γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Ministry of Science and TechnologyChina2015CB910103
National Natural Science Foundation of ChinaChina31400628

Revision History 

  • Version 1.0: 2018-01-24
    Type: Initial release
  • Version 1.1: 2018-01-31
    Changes: Database references