1XFO

Crystal Structure of an archaeal aminopeptidase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.183 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a dodecameric tetrahedral shaped aminopeptidase

Russo, S.Baumann, U.

(2004) J.Biol.Chem. 279: 51275-51281

  • DOI: 10.1074/jbc.M409455200

  • PubMed Abstract: 
  • Protein turnover is an essential process in living cells. The degradation of cytosolic polypeptides is mainly carried out by the proteasome, resulting in 7-9-amino acid long peptides. Further degradation is usually carried out by energy-independent p ...

    Protein turnover is an essential process in living cells. The degradation of cytosolic polypeptides is mainly carried out by the proteasome, resulting in 7-9-amino acid long peptides. Further degradation is usually carried out by energy-independent proteases like the tricorn protease from Thermoplasma acidophilum. Recently, a novel tetrahedral-shaped dodecameric 480-kDa aminopeptidase complex (TET) has been described in Haloarcula marismortui that differs from the known ring- or barrel-shaped self-compartmentalizing proteases. This complex is capable of degrading most peptides down to amino acids. We present here the crystal structure of the tetrahedral aminopeptidase homolog FrvX from Pyrococcus horikoshii. The monomer has a typical clan MH fold, as found for example in Aeromonas proteolytica aminopeptidase, containing a dinuclear zinc active center. The quaternary structure is built by dimers with a length of 100 A that form the edges of the tetrahedron. All 12 active sites are located on the inside of the tetrahedron. Substrate access is granted by pores with a maximal diameter of 10 A, allowing only small peptides and unfolded proteins access to the active site.


    Organizational Affiliation

    Departement für Chemie und Biochemie, University of Berne, Freiestrasse 3, CH-3012 Bern, Switzerland.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Frv operon protein FrvX
A, B, C, D
357Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3)Mutation(s): 0 
Gene Names: frvX
EC: 3.4.11.-
Find proteins for O59196 (Pyrococcus horikoshii (strain ATCC 700860 / DSM 12428 / JCM 9974 / NBRC 100139 / OT-3))
Go to UniProtKB:  O59196
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B, C, D
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.96 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.183 
  • Space Group: P 63
Unit Cell:
Length (Å)Angle (°)
a = 158.340α = 90.00
b = 158.340β = 90.00
c = 114.460γ = 120.00
Software Package:
Software NamePurpose
MOSFLMdata reduction
XDSdata scaling
MOLREPphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2004-09-15 
  • Released Date: 2004-10-05 
  • Deposition Author(s): Russo, S., Baumann, U.

Revision History 

  • Version 1.0: 2004-10-05
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Derived calculations, Version format compliance