Crystal structure of MSMEG_1712 from Mycobacterium smegmatis in complex with Beta-D-Galactofuranose

Experimental Data Snapshot

  • Resolution: 2.44 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 

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This is version 2.1 of the entry. See complete history


Detection and Characterization of a Mycobacterial L-Arabinofuranose ABC Transporter Identified with a Rapid Lipoproteomics Protocol.

Li, M.Muller, C.Frohlich, K.Gorka, O.Zhang, L.Gross, O.Schilling, O.Einsle, O.Jessen-Trefzer, C.

(2019) Cell Chem Biol 26: 852

  • DOI: https://doi.org/10.1016/j.chembiol.2019.03.002
  • Primary Citation of Related Structures:  
    6HB0, 6HBD, 6HBM, 6HYH

  • PubMed Abstract: 

    Nutrient uptake is essential for survival of organisms, and carbohydrates serve as a crucial carbon and energy source for most microorganisms. Given the importance of mycobacteria as human pathogens a detailed knowledge of carbohydrate uptake transporters is highly desirable, but currently available information is severely limited and mainly based on in silico analyses. Moreover, there is only very little data available on the in vitro characterization of carbohydrate transporters from mycobacterial species. To overcome these significant limitations there is a strong demand for innovative approaches to experimentally match substrates to ATP-binding cassette (ABC) transporters in a straightforward manner. Our study focuses on the model organism Mycobacterium smegmatis and identifies a mycobacterial ABC transport system based on a rapid label-free mass spectrometry lipoproteomics assay with broad applicability. Further validation and X-ray structure analyses reveal a highly selective mycobacterial L-arabinose uptake system.

  • Organizational Affiliation

    Institute of Biochemistry, Faculty of Chemistry and Pharmacy, University of Freiburg, Albertstraße 21, 79104 Freiburg, Germany.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ABC transporter periplasmic-binding protein YtfQ
A, B
320Mycolicibacterium smegmatis MC2 155Mutation(s): 0 
Gene Names: MSMEG_1712
Find proteins for A0QT50 (Mycolicibacterium smegmatis (strain ATCC 700084 / mc(2)155))
Explore A0QT50 
Go to UniProtKB:  A0QT50
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupA0QT50
Sequence Annotations
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
GZL (Subject of Investigation/LOI)
Query on GZL

Download Ideal Coordinates CCD File 
L [auth A],
S [auth B]
C6 H12 O6
Query on ZN

Download Ideal Coordinates CCD File 
C [auth A]
D [auth A]
E [auth A]
F [auth A]
G [auth A]
C [auth A],
D [auth A],
E [auth A],
F [auth A],
G [auth A],
H [auth A],
I [auth A],
J [auth A],
K [auth A],
M [auth B],
N [auth B],
O [auth B],
P [auth B],
Q [auth B],
R [auth B]
Experimental Data & Validation

Experimental Data

  • Resolution: 2.44 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.229 
  • Space Group: I 41 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 118.3α = 90
b = 118.3β = 90
c = 231.12γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
STARANISOdata scaling

Structure Validation

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Ligand Structure Quality Assessment 

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-01
    Type: Initial release
  • Version 1.1: 2019-07-03
    Changes: Data collection, Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2024-01-17
    Changes: Advisory, Data collection, Database references, Refinement description, Structure summary