1K32

Crystal structure of the tricorn protease


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.245 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of the tricorn protease reveals a protein disassembly line.

Brandstetter, H.Kim, J.S.Groll, M.Huber, R.

(2001) Nature 414: 466-470

  • DOI: 10.1038/35106609

  • PubMed Abstract: 
  • The degradation of cytosolic proteins is carried out predominantly by the proteasome, which generates peptides of 7-9 amino acids long. These products need further processing. Recently, a proteolytic system was identified in the model organism Thermo ...

    The degradation of cytosolic proteins is carried out predominantly by the proteasome, which generates peptides of 7-9 amino acids long. These products need further processing. Recently, a proteolytic system was identified in the model organism Thermoplasma acidophilum that performs this processing. The hexameric core protein of this modular system, referred to as tricorn protease, is a 720K protease that is able to assemble further into a giant icosahedral capsid, as determined by electron microscopy. Here, we present the crystal structure of the tricorn protease at 2.0 A resolution. The structure reveals a complex mosaic protein whereby five domains combine to form one of six subunits, which further assemble to form the 3-2-symmetric core protein. The structure shows how the individual domains coordinate the specific steps of substrate processing, including channelling of the substrate to, and the product from, the catalytic site. Moreover, the structure shows how accessory protein components might contribute to an even more complex protein machinery that efficiently collects the tricorn-released products.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
tricorn protease
A, B, C, D, E, F
1045Thermoplasma acidophilum (strain ATCC 25905 / DSM 1728 / JCM 9062 / NBRC 15155 / AMRC-C165)Mutation(s): 0 
Gene Names: tri
EC: 3.4.21.-
Find proteins for P96086 (Thermoplasma acidophilum (strain ATCC 25905 / DSM 1728 / JCM 9062 / NBRC 15155 / AMRC-C165))
Go to UniProtKB:  P96086
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.245 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 95.860α = 90.00
b = 245.998β = 105.30
c = 159.040γ = 90.00
Software Package:
Software NamePurpose
MLPHAREphasing
RSPSphasing
DENZOdata reduction
RSPSmodel building
MAINphasing
CNSrefinement
MAINmodel building
SOLOMONphasing
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-12-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance