3K9U

Crystal structure of paia acetyltransferase (ta0374) from thermoplasma acidophilum


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.194 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Crystal structure of the novel PaiA N-acetyltransferase from Thermoplasma acidophilum involved in the negative control of sporulation and degradative enzyme production.

Filippova, E.V.Shuvalova, L.Minasov, G.Kiryukhina, O.Zhang, Y.Clancy, S.Radhakrishnan, I.Joachimiak, A.Anderson, W.F.

(2011) Proteins 79: 2566-2577

  • DOI: https://doi.org/10.1002/prot.23062
  • Primary Citation of Related Structures:  
    3F0A, 3FIX, 3K9U, 3NE7

  • PubMed Abstract: 

    GCN5-related N-acetyltransferases (GNATs) are the most widely distributed acetyltransferase systems among all three domains of life. GNATs appear to be involved in several key processes, including microbial antibiotic resistance, compacting eukaryotic DNA, controlling gene expression, and protein synthesis. Here, we report the crystal structure of a putative GNAT Ta0374 from Thermoplasma acidophilum, a hyperacidophilic bacterium, that has been determined in an apo-form, in complex with its natural ligand (acetyl coenzyme A), and in complex with a product of reaction (coenzyme A) obtained by cocrystallization with spermidine. Sequence and structural analysis reveals that Ta0374 belongs to a novel protein family, PaiA, involved in the negative control of sporulation and degradative enzyme production. The crystal structure of Ta0374 confirms that it binds acetyl coenzyme A in a way similar to other GNATs and is capable of acetylating spermidine. Based on structural and docking analysis, it is expected that Glu53 and Tyr93 are key residues for recognizing spermidine. Additionally, we find that the purification His-Tag in the apo-form structure of Ta0374 prevents binding of acetyl coenzyme A in the crystal, though not in solution, and affects a chain-flip rotation of "motif A" which is the most conserved sequence among canonical acetyltransferases.


  • Organizational Affiliation

    Department of Molecular Pharmacology and Biological Chemistry, Northwestern University, Feinberg School of Medicine, Chicago, Illinois 60611, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
PaiA Acetyltransferase
A, B
159Thermoplasma acidophilumMutation(s): 0 
Gene Names: Ta0374
EC: 2.3.1.57
UniProt
Find proteins for Q9HL57 (Thermoplasma acidophilum (strain ATCC 25905 / DSM 1728 / JCM 9062 / NBRC 15155 / AMRC-C165))
Explore Q9HL57 
Go to UniProtKB:  Q9HL57
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9HL57
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 4 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ACO
Query on ACO

Download Ideal Coordinates CCD File 
G [auth A],
I [auth B]
ACETYL COENZYME *A
C23 H38 N7 O17 P3 S
ZSLZBFCDCINBPY-ZSJPKINUSA-N
BR
Query on BR

Download Ideal Coordinates CCD File 
E [auth A]BROMIDE ION
Br
CPELXLSAUQHCOX-UHFFFAOYSA-M
NI
Query on NI

Download Ideal Coordinates CCD File 
D [auth A]NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N
CL
Query on CL

Download Ideal Coordinates CCD File 
C [auth A],
F [auth A],
H [auth B]
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.194 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.28α = 90
b = 70.577β = 90
c = 87.671γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-3000data scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Revision History  (Full details and data files)

  • Version 1.0: 2009-11-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2011-07-27
    Changes: Database references
  • Version 1.3: 2017-11-01
    Changes: Refinement description
  • Version 1.4: 2023-09-06
    Changes: Data collection, Database references, Derived calculations, Refinement description