4MXE

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.60 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.227 

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
  • Primary Citation of Related Structures:  
    4MXE

  • 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 enzymatic mechanism of which has remained unknown ...

    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. Electronic address: herwig.schuler@ki.se.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
N-acetyltransferase ESCO1A, B206Homo sapiensMutation(s): 0 
Gene Names: EFO1ESCO1KIAA1911
EC: 2.3.1
Find proteins for Q5FWF5 (Homo sapiens)
Explore Q5FWF5 
Go to UniProtKB:  Q5FWF5
NIH Common Fund Data Resources
PHAROS:  Q5FWF5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACO
Query on ACO

Download Ideal Coordinates CCD File 
C [auth A], D [auth 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: 2.60 Å
  • R-Value Free: 0.279 
  • R-Value Work: 0.221 
  • R-Value Observed: 0.227 
  • Space Group: P 41 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.333α = 90
b = 66.333β = 90
c = 211.201γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
Auto-Rickshawphasing
REFMACrefinement
XDSdata reduction
XSCALEdata scaling

Structure Validation

View Full Validation Report



Entry History 

Revision History  (Full details and data files)

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