1Y8Q

SUMO E1 ACTIVATING ENZYME SAE1-SAE2-MG-ATP COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 

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Ligand Structure Quality Assessment 


This is version 1.3 of the entry. See complete history


Literature

Structures of the SUMO E1 provide mechanistic insights into SUMO activation and E2 recruitment to E1

Lois, L.M.Lima, C.D.

(2005) EMBO J 24: 439-451

  • DOI: 10.1038/sj.emboj.7600552
  • Primary Citation of Related Structures:  
    1Y8Q, 1Y8R

  • PubMed Abstract: 
  • E1 enzymes facilitate conjugation of ubiquitin and ubiquitin-like proteins through adenylation, thioester transfer within E1, and thioester transfer from E1 to E2 conjugating proteins. Structures of human heterodimeric Sae1/Sae2-Mg.ATP and Sae1/Sae2-SUMO-1-Mg ...

    E1 enzymes facilitate conjugation of ubiquitin and ubiquitin-like proteins through adenylation, thioester transfer within E1, and thioester transfer from E1 to E2 conjugating proteins. Structures of human heterodimeric Sae1/Sae2-Mg.ATP and Sae1/Sae2-SUMO-1-Mg.ATP complexes were determined at 2.2 and 2.75 A resolution, respectively. Despite the presence of Mg.ATP, the Sae1/Sae2-SUMO-1-Mg.ATP structure reveals a substrate complex insomuch as the SUMO C-terminus remains unmodified within the adenylation site and 35 A from the catalytic cysteine, suggesting that additional changes within the adenylation site may be required to facilitate chemistry prior to adenylation and thioester transfer. A mechanism for E2 recruitment to E1 is suggested by biochemical and genetic data, each of which supports a direct role for the E1 C-terminal ubiquitin-like domain for E2 recruitment during conjugation.


    Organizational Affiliation

    Structural Biology Program, Sloan-Kettering Institute, New York, NY 10021, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquitin-like 1 activating enzyme E1AA, C346Homo sapiensMutation(s): 0 
Gene Names: UBLE1ASAE1AOS1SUA1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UBE0 (Homo sapiens)
Explore Q9UBE0 
Go to UniProtKB:  Q9UBE0
PHAROS:  Q9UBE0
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Ubiquitin-like 2 activating enzyme E1BB, D640Homo sapiensMutation(s): 1 
Gene Names: UBLE1BSAE2UBA2HRIHFB2115
EC: 2.3.2
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UBT2 (Homo sapiens)
Explore Q9UBT2 
Go to UniProtKB:  Q9UBT2
PHAROS:  Q9UBT2
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.208 
  • R-Value Observed: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 101.245α = 90
b = 116.667β = 112.67
c = 106.078γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
SOLVEphasing
CNSrefinement

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

  • Deposited Date: 2004-12-13 
  • Released Date: 2005-01-25 
  • Deposition Author(s): Lois, L.M., Lima, C.D.

Revision History  (Full details and data files)

  • Version 1.0: 2005-01-25
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2021-10-20
    Changes: Database references, Derived calculations