4BMH

Crystal structure of SsHAT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.146 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Three-Dimensional Structure of a Streptomyces Sviceus Gnat Acetyltransferase with Similarity to the C-Terminal Domain of the Human Gh84 O-Glcnacase

He, Y.Roth, C.Turkenburg, J.P.Davies, G.J.

(2014) Acta Crystallogr.,Sect.D 70: 186

  • DOI: 10.1107/S1399004713029155

  • PubMed Abstract: 
  • The mammalian O-GlcNAc hydrolysing enzyme O-GlcNAcase (OGA) is a multi-domain protein with glycoside hydrolase activity in the N-terminus and with a C-terminal domain that has low sequence similarity to known acetyltransferases, prompting speculation ...

    The mammalian O-GlcNAc hydrolysing enzyme O-GlcNAcase (OGA) is a multi-domain protein with glycoside hydrolase activity in the N-terminus and with a C-terminal domain that has low sequence similarity to known acetyltransferases, prompting speculation, albeit controversial, that the C-terminal domain may function as a histone acetyltransferase (HAT). There are currently scarce data available regarding the structure and function of this C-terminal region. Here, a bacterial homologue of the human OGA C-terminal domain, an acetyltransferase protein (accession No. ZP_05014886) from Streptomyces sviceus (SsAT), was cloned and its crystal structure was solved to high resolution. The structure reveals a conserved protein core that has considerable structural homology to the acetyl-CoA (AcCoA) binding site of GCN5-related acetyltransferases (GNATs). Calorimetric data further confirm that SsAT is indeed able to bind AcCoA in solution with micromolar affinity. Detailed structural analysis provided insight into the binding of AcCoA. An acceptor-binding cavity was identified, indicating that the physiological substrate of SsAT may be a small molecule. Consistent with recently published work, the SsAT structure further questions a HAT function for the human OGA domain.


    Organizational Affiliation

    College of Chemistry and Materials Science, Northwest University, Xi'an 710069, People's Republic of China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ACETYLTRANSFERASE
A
262Streptomyces sviceus ATCC 29083Mutation(s): 0 
Find proteins for B5HKU0 (Streptomyces sviceus ATCC 29083)
Go to UniProtKB:  B5HKU0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.146 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 75.885α = 90.00
b = 75.885β = 90.00
c = 76.517γ = 120.00
Software Package:
Software NamePurpose
SCALAdata scaling
REFMACrefinement
SHELXphasing
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-01-15
    Type: Initial release
  • Version 1.1: 2014-01-22
    Type: Database references