1QSM

Histone Acetyltransferase HPA2 from Saccharomyces Cerevisiae in Complex with Acetyl Coenzyme A


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of the histone acetyltransferase Hpa2: A tetrameric member of the Gcn5-related N-acetyltransferase superfamily.

Angus-Hill, M.L.Dutnall, R.N.Tafrov, S.T.Sternglanz, R.Ramakrishnan, V.

(1999) J Mol Biol 294: 1311-1325

  • DOI: 10.1006/jmbi.1999.3338
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • We report the crystal structure of the yeast protein Hpa2 in complex with acetyl coenzyme A (AcCoA) at 2.4 A resolution and without cofactor at 2.9 A resolution. Hpa2 is a member of the Gcn5-related N-acetyltransferase (GNAT) superfamily, a family of ...

    We report the crystal structure of the yeast protein Hpa2 in complex with acetyl coenzyme A (AcCoA) at 2.4 A resolution and without cofactor at 2.9 A resolution. Hpa2 is a member of the Gcn5-related N-acetyltransferase (GNAT) superfamily, a family of enzymes with diverse substrates including histones, other proteins, arylalkylamines and aminoglycosides. In vitro, Hpa2 is able to acetylate specific lysine residues of histones H3 and H4 with a preference for Lys14 of histone H3. Hpa2 forms a stable dimer in solution and forms a tetramer upon binding AcCoA. The crystal structure reveals that the Hpa2 tetramer is stabilized by base-pair interactions between the adenine moieties of the bound AcCoA molecules. These base-pairs represent a novel method of stabilizing an oligomeric protein structure. Comparison of the structure of Hpa2 with those of other GNAT superfamily members illustrates a remarkably conserved fold of the catalytic domain of the GNAT family even though members of this family share low levels of sequence homology. This comparison has allowed us to better define the borders of the four sequence motifs that characterize the GNAT family, including a motif that is not discernable in histone acetyltransferases by sequence comparison alone. We discuss implications of the Hpa2 structure for the catalytic mechanism of the GNAT enzymes and the opportunity for multiple histone tail modification created by the tetrameric Hpa2 structure.


    Organizational Affiliation

    Department of Biochemistry, University of Utah School of Medicine, Salt Lake City, UT 84132, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HPA2 HISTONE ACETYLTRANSFERASE
A, B, C, D
152Saccharomyces cerevisiaeMutation(s): 0 
EC: 2.3.1.48
Find proteins for Q06592 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Go to UniProtKB:  Q06592
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACO
Query on ACO

Download CCD File 
A, B, C, D
ACETYL COENZYME *A
C23 H38 N7 O17 P3 S
ZSLZBFCDCINBPY-ZSJPKINUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.40 Å
  • R-Value Free: 0.244 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.168 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 145.6α = 90
b = 184.1β = 90
c = 70γ = 90
Software Package:
Software NamePurpose
SOLVEphasing
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-12-22
    Type: Initial release
  • Version 1.1: 2007-10-21
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance