4BMH

Crystal structure of SsHAT


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.146 
  • R-Value Observed: 0.148 

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 D Biol Crystallogr 70: 186

  • DOI: 10.1107/S1399004713029155
  • Primary Citation of Related Structures:  
    4BMH

  • 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, albeit controversial, that the C-terminal domain may function as a histone acetyltransferase (HAT) ...

    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

    York Structural Biology Laboratory, Department of Chemistry, The University of York, York YO10 5DD, England.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
ACETYLTRANSFERASEA262Streptomyces sviceus ATCC 29083Mutation(s): 0 
Gene Names: SSEG_00025
Find proteins for B5HKU0 (Streptomyces sviceus ATCC 29083)
Explore B5HKU0 
Go to UniProtKB:  B5HKU0
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download Ideal Coordinates CCD File 
B [auth A]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.175 
  • R-Value Work: 0.146 
  • R-Value Observed: 0.148 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.885α = 90
b = 75.885β = 90
c = 76.517γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling
SHELXphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

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