4GS4

Structure of the alpha-tubulin acetyltransferase, alpha-TAT1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.112 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of the alpha-tubulin acetyltransferase, alpha TAT1, and implications for tubulin-specific acetylation.

Friedmann, D.R.Aguilar, A.Fan, J.Nachury, M.V.Marmorstein, R.

(2012) Proc.Natl.Acad.Sci.USA 109: 19655-19660

  • DOI: 10.1073/pnas.1209357109

  • PubMed Abstract: 
  • Protein acetylation is an important posttranslational modification with the recent identification of new substrates and enzymes, new links to disease, and modulators of protein acetylation for therapy. α-Tubulin acetyltransferase (αTAT1) is the major ...

    Protein acetylation is an important posttranslational modification with the recent identification of new substrates and enzymes, new links to disease, and modulators of protein acetylation for therapy. α-Tubulin acetyltransferase (αTAT1) is the major α-tubulin lysine-40 (K40) acetyltransferase in mammals, nematodes, and protozoa, and its activity plays a conserved role in several microtubule-based processes. Here, we present the X-ray crystal structure of the human αTAT1/acetyl-CoA complex. Together with structure-based mutagenesis, enzymatic analysis, and functional studies in cells, we elucidate the catalytic mechanism and mode of tubulin-specific acetylation. We find that αTAT1 has an overall fold similar to the Gcn5 histone acetyltransferase but contains a relatively wide substrate binding groove and unique structural elements that play important roles in α-tubulin-specific acetylation. Conserved aspartic acid and cysteine residues play important catalytic roles through a ternary complex mechanism. αTAT1 mutations have analogous effects on tubulin acetylation in vitro and in cells, demonstrating that it is the central determining factor of α-tubulin K40 acetylation levels in vivo. Together, these studies provide general insights into distinguishing features between histone and tubulin acetyltransferases, and they have specific implications for understanding the molecular basis of tubulin acetylation and for developing small molecule modulators of microtubule acetylation for therapy.


    Organizational Affiliation

    Program in Gene Expression and Regulation, The Wistar Institute, Philadelphia, PA 19104, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-tubulin N-acetyltransferase
A
240Homo sapiensMutation(s): 0 
Gene Names: ATAT1 (C6orf134, MEC17)
EC: 2.3.1.108
Find proteins for Q5SQI0 (Homo sapiens)
Go to Gene View: ATAT1
Go to UniProtKB:  Q5SQI0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACO
Query on ACO

Download SDF File 
Download CCD File 
A
ACETYL COENZYME *A
C23 H38 N7 O17 P3 S
ZSLZBFCDCINBPY-ZSJPKINUSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.112 Å
  • R-Value Free: 0.253 
  • R-Value Work: 0.227 
  • Space Group: C 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 97.931α = 90.00
b = 130.668β = 90.00
c = 37.423γ = 90.00
Software Package:
Software NamePurpose
SOLVEphasing
HKL-2000data collection
HKL-2000data reduction
HKL-2000data scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-10-17
    Type: Initial release
  • Version 1.1: 2013-08-28
    Type: Database references