4NH0

Cytoplasmic domain of the Thermomonospora curvata Type VII Secretion ATPase EccC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.227 

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This is version 1.1 of the entry. See complete history


Literature

Substrates Control Multimerization and Activation of the Multi-Domain ATPase Motor of Type VII Secretion.

Rosenberg, O.S.Dovala, D.Li, X.Connolly, L.Bendebury, A.Finer-Moore, J.Holton, J.Cheng, Y.Stroud, R.M.Cox, J.S.

(2015) Cell 161: 501-512

  • DOI: 10.1016/j.cell.2015.03.040
  • Primary Citation of Related Structures:  
    4LWS, 4LYA, 4N1A, 4NH0

  • PubMed Abstract: 
  • Mycobacterium tuberculosis and Staphylococcus aureus secrete virulence factors via type VII protein secretion (T7S), a system that intriguingly requires all of its secretion substrates for activity. To gain insights into T7S function, we used structural approaches to guide studies of the putative translocase EccC, a unique enzyme with three ATPase domains, and its secretion substrate EsxB ...

    Mycobacterium tuberculosis and Staphylococcus aureus secrete virulence factors via type VII protein secretion (T7S), a system that intriguingly requires all of its secretion substrates for activity. To gain insights into T7S function, we used structural approaches to guide studies of the putative translocase EccC, a unique enzyme with three ATPase domains, and its secretion substrate EsxB. The crystal structure of EccC revealed that the ATPase domains are joined by linker/pocket interactions that modulate its enzymatic activity. EsxB binds via its signal sequence to an empty pocket on the C-terminal ATPase domain, which is accompanied by an increase in ATPase activity. Surprisingly, substrate binding does not activate EccC allosterically but, rather, by stimulating its multimerization. Thus, the EsxB substrate is also an integral T7S component, illuminating a mechanism that helps to explain interdependence of substrates, and suggests a model in which binding of substrates modulates their coordinate release from the bacterium.


    Organizational Affiliation

    Department of Microbiology and Immunology, Program in Microbial Pathogenesis and Host Defense, University of California, San Francisco, San Francisco, CA 94158, USA. Electronic address: jeffery.cox@ucsf.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Cell divisionFtsK/SpoIIIEA, B1147Thermomonospora curvata DSM 43183Mutation(s): 0 
Gene Names: Tcur_0607eccC
UniProt
Find proteins for D1A4G7 (Thermomonospora curvata (strain ATCC 19995 / DSM 43183 / JCM 3096 / KCTC 9072 / NBRC 15933 / NCIMB 10081 / Henssen B9))
Explore D1A4G7 
Go to UniProtKB:  D1A4G7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.90 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.226 
  • R-Value Observed: 0.227 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 251.816α = 90
b = 116.316β = 102.7
c = 174.11γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
SHARPphasing
PHENIXrefinement
HKL-2000data reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-02-11
    Type: Initial release
  • Version 1.1: 2016-09-21
    Changes: Database references