Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 17298.38 
• Atom Count: 1202 
• Residue Count: 152 
• Unique protein chains: 1

2AAK

UBIQUITIN CONJUGATING ENZYME FROM ARABIDOPSIS THALIANA

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

• Classification: UBIQUITIN CONJUGATION
• Organism(s): Arabidopsis thaliana
• Expression System: Escherichia coli


• 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: 2.4 Å
• R-Value Free: 0.287 
• R-Value Work: 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


• 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

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
UBIQUITIN CONJUGATING ENZYME	A	152	Arabidopsis thaliana	Mutation(s): 0  Gene Names: UBC1 EC: 2.3.2.23
Find proteins for P25865 (Arabidopsis thaliana) Go to UniProtKB:  P25865

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.4 Å
• R-Value Free: 0.287 
• R-Value Work: 0.221 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 41.800	α = 90.00
b = 44.900	β = 90.00
c = 83.200	γ = 90.00

Software Package:

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

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
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance