Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 19.59 kDa 
• Atom Count: 1174 
• Modelled Residue Count: 132 
• Deposited Residue Count: 160 
• Unique protein chains: 1

3F8K

Crystal structure of protein acetyltransferase (PAT) from Sulfolobus solfataricus

• PDB DOI: 10.2210/pdb3F8K/pdb

• Classification: TRANSFERASE
• Organism(s): Saccharolobus solfataricus P2
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-11-12 Released: 2009-05-26 
• Deposition Author(s): Brent, M.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.84 Å
• R-Value Free: 0.221 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 

Literature

Structure and Biochemical Characterization of Protein Acetyltransferase from Sulfolobus solfataricus.

Brent, M.M., Iwata, A., Carten, J., Zhao, K., Marmorstein, R.

(2009) J Biol Chem 284: 19412-19419

• PubMed: 19473964 
• DOI: 10.1074/jbc.M109.014951
• Primary Citation of Related Structures:  
  3F8K


• PubMed Abstract: 
  

The Sulfolobus solfataricus protein acetyltransferase (PAT) acetylates ALBA, an abundant nonspecific DNA-binding protein, on Lys(16) to reduce its DNA affinity, and the Sir2 deacetylase reverses the modification to cause transcriptional repression. This represents a "primitive" model for chromatin regulation analogous to histone modification in eukaryotes. We report the 1.84-A crystal structure of PAT in complex with coenzyme A. The structure reveals homology to both prokaryotic GNAT acetyltransferases and eukaryotic histone acetyltransferases (HATs), with an additional "bent helix" proximal to the substrate binding site that might play an autoregulatory function. Investigation of active site mutants suggests that PAT does not use a single general base or acid residue for substrate deprotonation and product reprotonation, respectively, and that a diffusional step, such as substrate binding, may be rate-limiting. The catalytic efficiency of PAT toward ALBA is low relative to other acetyltransferases, suggesting that there may be better, unidentified substrates for PAT. The structural similarity of PAT to eukaryotic HATs combined with its conserved role in chromatin regulation suggests that PAT is evolutionarily related to the eukaryotic HATs.

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Organizational Affiliation: 

Wistar Institute, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Protein acetyltransferase	A	160	Saccharolobus solfataricus P2	Mutation(s): 0  Gene Names: SSO2813
UniProt
Find proteins for Q97V23 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2)) Explore Q97V23  Go to UniProtKB:  Q97V23

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
COA	B [auth A]	COENZYME A C21 H36 N7 O16 P3 S RGJOEKWQDUBAIZ-IBOSZNHHSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
MSE	A	L-PEPTIDE LINKING	C5 H11 N O2 Se		MET

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.84 Å
• R-Value Free: 0.221 
• R-Value Work: 0.202 
• R-Value Observed: 0.202 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 44.701	α = 90
b = 46.75	β = 90
c = 68.624	γ = 90

Software Package:

Software Name	Purpose
MAR345	data collection
SOLVE	phasing
CNS	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2008-11-12 
• Released Date: 2009-05-26 
Deposition Author(s): Brent, M.M.

Revision History  

• Version 1.0: 2009-05-26
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-11-01
  Changes: Refinement description