The crystal structure of Mycobacterium tuberculosis Rv1747 FHA-1

Experimental Data Snapshot

  • Resolution: 1.80 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 

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Biophysical Characterization of the Tandem FHA Domain Regulatory Module from the Mycobacterium tuberculosis ABC Transporter Rv1747.

Heinkel, F.Shen, L.Richard-Greenblatt, M.Okon, M.Bui, J.M.Gee, C.L.Gay, L.M.Alber, T.Av-Gay, Y.Gsponer, J.McIntosh, L.P.

(2018) Structure 26: 972

  • DOI: https://doi.org/10.1016/j.str.2018.04.018
  • Primary Citation of Related Structures:  
    6CAH, 6CCD

  • PubMed Abstract: 

    The Mycobacterium tuberculosis ATP-binding cassette transporter Rv1747 is a putative exporter of cell wall biosynthesis intermediates. Rv1747 has a cytoplasmic regulatory module consisting of two pThr-interacting Forkhead-associated (FHA) domains connected by a conformationally disordered linker with two phospho-acceptor threonines (pThr). The structures of FHA-1 and FHA-2 were determined by X-ray crystallography and nuclear magnetic resonance (NMR) spectroscopy, respectively. Relative to the canonical 11-strand β-sandwich FHA domain fold of FHA-1, FHA-2 is circularly permuted and lacking one β-strand. Nevertheless, the two share a conserved pThr-binding cleft. FHA-2 is less stable and more dynamic than FHA-1, yet binds model pThr peptides with moderately higher affinity (∼50 μM versus 500 μM equilibrium dissociation constants). Based on NMR relaxation and chemical shift perturbation measurements, when joined within a polypeptide chain, either FHA domain can bind either linker pThr to form intra- and intermolecular complexes. We hypothesize that this enables tunable phosphorylation-dependent multimerization to regulate Rv1747 transporter activity.

  • Organizational Affiliation

    Genome Science and Technology Program, University of British Columbia, Vancouver, BC V6T 1Z4, Canada; Michael Smith Laboratories, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ABC transporter ATP-binding/permease protein Rv1747111Mycobacterium tuberculosis H37RvMutation(s): 0 
Gene Names: Rv1747
Find proteins for O65934 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore O65934 
Go to UniProtKB:  O65934
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO65934
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.80 Å
  • R-Value Free: 0.208 
  • R-Value Work: 0.169 
  • R-Value Observed: 0.171 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.922α = 90
b = 58.922β = 90
c = 68.632γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States1R01GM070962-01A1

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-20
    Type: Initial release
  • Version 1.1: 2018-07-18
    Changes: Data collection, Database references
  • Version 1.2: 2019-02-20
    Changes: Author supporting evidence, Data collection
  • Version 1.3: 2020-01-01
    Changes: Author supporting evidence
  • Version 1.4: 2024-03-13
    Changes: Data collection, Database references