4MXE

Human ESCO1 (Eco1/Ctf7 ortholog), acetyltransferase domain in complex with acetyl-CoA


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.221 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Sister Chromatid Cohesion Establishment Factor ESCO1 Operates by Substrate-Assisted Catalysis.

Kouznetsova, E.Kanno, T.Karlberg, T.Thorsell, A.G.Wisniewska, M.Kursula, P.Sjogren, C.Schuler, H.

(2016) Structure 24: 789-796

  • DOI: 10.1016/j.str.2016.03.021

  • PubMed Abstract: 
  • Sister chromatid cohesion, formed by the cohesin protein complex, is essential for chromosome segregation. In order for cohesion to be established, the cohesin subunit SMC3 needs to be acetylated by a homolog of the ESCO1/Eco1 acetyltransferases, the ...

    Sister chromatid cohesion, formed by the cohesin protein complex, is essential for chromosome segregation. In order for cohesion to be established, the cohesin subunit SMC3 needs to be acetylated by a homolog of the ESCO1/Eco1 acetyltransferases, the enzymatic mechanism of which has remained unknown. Here we report the crystal structure of the ESCO1 acetyltransferase domain in complex with acetyl-coenzyme A, and show by SAXS that ESCO1 is a dimer in solution. The structure reveals an active site that lacks a potential catalytic base side chain. However, mutation of glutamate 789, a surface residue that is close to the automodification target lysine 803, strongly reduces autoacetylation of ESCO1. Moreover, budding yeast Smc3 mutated at the conserved residue D114, adjacent to the cohesion-activating acetylation site K112,K113, cannot be acetylated in vivo. This indicates that ESCO1 controls cohesion through substrate-assisted catalysis. Thus, this study discloses a key mechanism for cohesion establishment.


    Organizational Affiliation

    Structural Genomics Consortium and Department of Medical Biochemistry and Biophysics, Karolinska Institutet, 17177 Stockholm, Sweden.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
N-acetyltransferase ESCO1
A, B
206Homo sapiensMutation(s): 0 
Gene Names: ESCO1 (EFO1, KIAA1911)
EC: 2.3.1.-
Find proteins for Q5FWF5 (Homo sapiens)
Go to Gene View: ESCO1
Go to UniProtKB:  Q5FWF5
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACO
Query on ACO

Download SDF File 
Download CCD File 
A, B
ACETYL COENZYME *A
C23 H38 N7 O17 P3 S
ZSLZBFCDCINBPY-ZSJPKINUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.6 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.221 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 66.333α = 90.00
b = 66.333β = 90.00
c = 211.201γ = 90.00
Software Package:
Software NamePurpose
MxCuBEdata collection
XDSdata reduction
XSCALEdata scaling
Auto-Rickshawphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Revision History 

  • Version 1.0: 2015-04-08
    Type: Initial release
  • Version 1.1: 2016-05-04
    Type: Database references
  • Version 1.2: 2016-05-18
    Type: Database references