3FP9

Crystal structure of Intern Domain of proteasome-associated ATPase, Mycobacterium tuberculosis


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.216 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structural Insights on the Mycobacterium tuberculosis Proteasomal ATPase Mpa.

Wang, T.Li, H.Lin, G.Tang, C.Li, D.Nathan, C.Darwin, K.H.Li, H.

(2009) Structure 17: 1377-1385

  • DOI: 10.1016/j.str.2009.08.010
  • Primary Citation of Related Structures:  
    3FP9

  • PubMed Abstract: 
  • Proteasome-mediated protein turnover in all domains of life is an energy-dependent process that requires ATPase activity. Mycobacterium tuberculosis (Mtb) was recently shown to possess a ubiquitin-like proteasome pathway that plays an essential role in Mtb resistance to killing by products of host macrophages ...

    Proteasome-mediated protein turnover in all domains of life is an energy-dependent process that requires ATPase activity. Mycobacterium tuberculosis (Mtb) was recently shown to possess a ubiquitin-like proteasome pathway that plays an essential role in Mtb resistance to killing by products of host macrophages. Here we report our structural and biochemical investigation of Mpa, the presumptive Mtb proteasomal ATPase. We demonstrate that Mpa binds to the Mtb proteasome in the presence of ATPgammaS, providing the physical evidence that Mpa is the proteasomal ATPase. X-ray crystallographic determination of the conserved interdomain showed a five stranded double beta barrel structure containing a Greek key motif. Structure and mutational analysis indicate a major role of the interdomain for Mpa hexamerization. Our mutational and functional studies further suggest that the central channel in the Mpa hexamer is involved in protein substrate translocation and degradation. These studies provide insights into how a bacterial proteasomal ATPase interacts with and facilitates protein degradation by the proteasome.


    Organizational Affiliation

    Biology Department, Brookhaven National Laboratory, Upton, NY 11973-5000, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proteasome-associated ATPase
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H, I, J, K, L
153Mycobacterium tuberculosisMutation(s): 0 
UniProt
Find proteins for P9WQN5 (Mycobacterium tuberculosis (strain ATCC 25618 / H37Rv))
Explore P9WQN5 
Go to UniProtKB:  P9WQN5
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.213 
  • R-Value Observed: 0.216 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 74.86α = 90
b = 74.994β = 90.32
c = 200.846γ = 90
Software Package:
Software NamePurpose
CBASSdata collection
PHENIXmodel building
SHELXmodel building
SOLVEphasing
PHASERphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
PHENIXphasing
SHELXphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2009-01-04 
  • Released Date: 2009-10-27 
  • Deposition Author(s): Li, H., Wang, T.

Revision History  (Full details and data files)

  • Version 1.0: 2009-10-27
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance