The Crystal Structure of a Truncated Form of Yeast ATP Sulfurylase, Lacking the C-Terminal APS Kinase-like Domain, in complex with Sulfate

Experimental Data Snapshot

  • Resolution: 1.40 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 

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Structural and functional analysis of a truncated form of Saccharomyces cerevisiae ATP sulfurylase: C-terminal domain essential for oligomer formation but not for activity

Lalor, D.J.Schnyder, T.Saridakis, V.Pilloff, D.E.Dong, A.Tang, H.Leyh, T.S.Pai, E.F.

(2003) Protein Eng 16: 1071-1079

  • DOI: https://doi.org/10.1093/protein/gzg133
  • Primary Citation of Related Structures:  
    1J70, 1R6X

  • PubMed Abstract: 

    ATP sulfurylase catalyzes the first step in the activation of sulfate by transferring the adenylyl-moiety (AMP approximately ) of ATP to sulfate to form adenosine 5'-phosphosulfate (APS) and pyrophosphate (PP(i)). Subsequently, APS kinase mediates transfer of the gamma-phosphoryl group of ATP to APS to form 3'-phosphoadenosine 5'-phosphosulfate (PAPS) and ADP. The recently determined crystal structure of yeast ATP sulfurylase suggests that its C-terminal domain is structurally quite independent from the other domains, and not essential for catalytic activity. It seems, however, to dictate the oligomerization state of the protein. Here we show that truncation of this domain results in a monomeric enzyme with slightly enhanced catalytic efficiency. Structural alignment of the C-terminal domain indicated that it is extremely similar in its fold to APS kinase although not catalytically competent. While carrying out these structural and functional studies a surface groove was noted. Careful inspection and modeling revealed that the groove is sufficiently deep and wide, as well as properly positioned, to act as a substrate channel between the ATP sulfurylase and APS kinase-like domains of the enzyme.

  • Organizational Affiliation

    Department of Biochemistry, University of Toronto, Toronto, Ontario M5S 1A8, Canada.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
ATP:sulfate adenylyltransferase395Saccharomyces cerevisiaeMutation(s): 0 
Gene Names: MET3YJR010WJ1436
Find proteins for P08536 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P08536 
Go to UniProtKB:  P08536
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP08536
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.40 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.197 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.186α = 90
b = 59.111β = 90
c = 131.165γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-11-11
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2023-08-23
    Changes: Data collection, Database references, Derived calculations, Refinement description