5TXV

HslU P21 cell with 4 hexamers


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 7.09 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.274 
  • R-Value Observed: 0.276 

wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Covalently linked HslU hexamers support a probabilistic mechanism that links ATP hydrolysis to protein unfolding and translocation.

Baytshtok, V.Chen, J.Glynn, S.E.Nager, A.R.Grant, R.A.Baker, T.A.Sauer, R.T.

(2017) J Biol Chem 292: 5695-5704

  • DOI: 10.1074/jbc.M116.768978
  • Primary Citation of Related Structures:  
    5TXV

  • PubMed Abstract: 
  • The HslUV proteolytic machine consists of HslV, a double-ring self-compartmentalized peptidase, and one or two AAA+ HslU ring hexamers that hydrolyze ATP to power the unfolding of protein substrates and their translocation into the proteolytic chamber of ...

    The HslUV proteolytic machine consists of HslV, a double-ring self-compartmentalized peptidase, and one or two AAA+ HslU ring hexamers that hydrolyze ATP to power the unfolding of protein substrates and their translocation into the proteolytic chamber of HslV. Here, we use genetic tethering and disulfide bonding strategies to construct HslU pseudohexamers containing mixtures of ATPase active and inactive subunits at defined positions in the hexameric ring. Genetic tethering impairs HslV binding and degradation, even for pseudohexamers with six active subunits, but disulfide-linked pseudohexamers do not have these defects, indicating that the peptide tether interferes with HslV interactions. Importantly, pseudohexamers containing different patterns of hydrolytically active and inactive subunits retain the ability to unfold protein substrates and/or collaborate with HslV in their degradation, supporting a model in which ATP hydrolysis and linked mechanical function in the HslU ring operate by a probabilistic mechanism.


    Organizational Affiliation

    From the Department of Biology and bobsauer@mit.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ATP-dependent protease ATPase subunit HslUABCDEFGHABCDEFGHIJKLMNOPQRSTUVWX
442Escherichia coli K-12Mutation(s): 0 
Gene Names: hslUhtpIb3931JW3902
Find proteins for P0A6H5 (Escherichia coli (strain K12))
Explore P0A6H5 
Go to UniProtKB:  P0A6H5
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 7.09 Å
  • R-Value Free: 0.298 
  • R-Value Work: 0.274 
  • R-Value Observed: 0.276 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.497α = 90
b = 420.86β = 98.56
c = 176.418γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
HKL-2000data scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute Of Allergy and Infectious Diseases (NIH/NIAID)United StatesAI-16892

Revision History 

  • Version 1.0: 2017-03-01
    Type: Initial release
  • Version 1.1: 2017-03-08
    Changes: Database references
  • Version 1.2: 2017-04-19
    Changes: Database references
  • Version 1.3: 2017-09-20
    Changes: Author supporting evidence, Refinement description
  • Version 1.4: 2019-12-11
    Changes: Author supporting evidence