3PTF

X-ray structure of the non-covalent complex between UbcH5A and Ubiquitin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.209 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Modulation of K11-Linkage Formation by Variable Loop Residues within UbcH5A.

Bosanac, I.Phu, L.Pan, B.Zilberleyb, I.Maurer, B.Dixit, V.M.Hymowitz, S.G.Kirkpatrick, D.S.

(2011) J.Mol.Biol. 408: 420-431

  • DOI: 10.1016/j.jmb.2011.03.011

  • PubMed Abstract: 
  • Ubiquitination refers to the covalent addition of ubiquitin (Ub) to substrate proteins or other Ub molecules via the sequential action of three enzymes (E1, E2, and E3). Recent advances in mass spectrometry proteomics have made it possible to identif ...

    Ubiquitination refers to the covalent addition of ubiquitin (Ub) to substrate proteins or other Ub molecules via the sequential action of three enzymes (E1, E2, and E3). Recent advances in mass spectrometry proteomics have made it possible to identify and quantify Ub linkages in biochemical and cellular systems. We used these tools to probe the mechanisms controlling linkage specificity for UbcH5A. UbcH5A is a promiscuous E2 enzyme with an innate preference for forming polyubiquitin chains through lysine 11 (K11), lysine 48 (K48), and lysine 63 (K63) of Ub. We present the crystal structure of a noncovalent complex between Ub and UbcH5A. This structure reveals an interaction between the Ub surface flanking K11 and residues adjacent to the E2 catalytic cysteine and suggests a possible role for this surface in formation of K11 linkages. Structure-guided mutagenesis, in vitro ubiquitination and quantitative mass spectrometry have been used to characterize the ability of residues in the vicinity of the E2 active site to direct synthesis of K11- and K63-linked polyubiquitin. Mutation of critical residues in the interface modulated the linkage specificity of UbcH5A, resulting in generation of more K63-linked chains at the expense of K11-linkage synthesis. This study provides direct evidence that the linkage specificity of E2 enzymes may be altered through active-site mutagenesis.


    Organizational Affiliation

    Department of Structural Biology, Genentech Inc., 1 DNA Way, South San Francisco, CA 94080, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Ubiquitin-conjugating enzyme E2 D1
A, B
153Homo sapiensGene Names: UBE2D1 (SFT, UBC5A, UBCH5, UBCH5A)
EC: 2.3.2.23, 2.3.2.24
Find proteins for P51668 (Homo sapiens)
Go to Gene View: UBE2D1
Go to UniProtKB:  P51668
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Polyubiquitin-B
C, D
79Homo sapiensGene Names: UBC
Find proteins for P0CG48 (Homo sapiens)
Go to Gene View: UBC
Go to UniProtKB:  P0CG48
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.7 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.209 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 27.462α = 90.00
b = 102.903β = 90.00
c = 159.806γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
BOSdata collection
HKL-2000data scaling
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-11
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance