Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 17.30 kDa 
• Atom Count: 1202 
• Modelled Residue Count: 150 
• Deposited Residue Count: 152 
• Unique protein chains: 1

2AAK

UBIQUITIN CONJUGATING ENZYME FROM ARABIDOPSIS THALIANA

• PDB DOI: 10.2210/pdb2AAK/pdb
• Entry: 2AAK supersedes: 1AAK

• Classification: UBIQUITIN CONJUGATION
• Organism(s): Arabidopsis thaliana
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1997-11-06 Released: 1998-03-18 
• Deposition Author(s): Cook, W.J., Jeffrey, L.C., Sullivan, M.L., Vierstra, R.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.287 
• R-Value Work: 0.221 
• R-Value Observed: 0.221 

Literature

Three-dimensional structure of a ubiquitin-conjugating enzyme (E2).

Cook, W.J., Jeffrey, L.C., Sullivan, M.L., Vierstra, R.D.

(1992) J Biol Chem 267: 15116-15121

• PubMed: 1321826 
• DOI: 10.2210/pdb1aak/pdb
• Primary Citation of Related Structures:  
  2AAK


• PubMed Abstract: 
  

The x-ray crystal structure of a recombinant ubiquitin-conjugating enzyme (E2) encoded by the UBC1 gene of the plant Arabidopsis thaliana has been determined with the use of multiple isomorphous replacement techniques and refined at 2.4-A resolution by simulated annealing and restrained least-squares. This E2 is an alpha/beta protein, with four alpha-helices and a four-stranded antiparallel beta-sheet. The NH2 and COOH termini, which may be important for interaction with other enzymes and substrates in the ubiquitin-conjugation pathway, are on the opposite side of the molecule from the cysteine residue that binds to the COOH terminus of ubiquitin. This structure should now allow for the rational analysis of E2 function by in vitro mutagenesis and facilitate the effective design of E2s with unique specificities or catalytic functions.

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Organizational Affiliation: 

Department of Pathology, University of Alabama, Birmingham 35294.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
UBIQUITIN CONJUGATING ENZYME	A	152	Arabidopsis thaliana	Mutation(s): 0  Gene Names: UBC1, At1g14400, F14L17.17, F14L17_35 EC: 6.3.2.19 (PDB Primary Data), 2.3.2.23 (UniProt)
UniProt
Find proteins for P25865 (Arabidopsis thaliana) Explore P25865  Go to UniProtKB:  P25865

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.40 Å
• R-Value Free: 0.287 
• R-Value Work: 0.221 
• R-Value Observed: 0.221 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.8	α = 90
b = 44.9	β = 90
c = 83.2	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
XENGEN	data reduction
XENGEN	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-11-06 
• Released Date: 1998-03-18 
Deposition Author(s): Cook, W.J., Jeffrey, L.C., Sullivan, M.L., Vierstra, R.D.
• This entry supersedes: 1AAK

Revision History  

• Version 1.0: 1998-03-18
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance