3ZRR

Crystal structure and substrate specificity of a thermophilic archaeal serine : pyruvate aminotransferase from Sulfolobus solfataricus

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.189 

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Literature

Crystal Structure and Substrate Specificity of the Thermophilic Serine:Pyruvate Aminotransferase from Sulfolobus Solfataricus

Sayer, C., Bommer, M., Isupov, M.N., Ward, J., Littlechild, J.

(2012) Acta Crystallogr D Biol Crystallogr 68: 763

  • DOI: 10.1107/S0907444912011274
  • Primary Citation of Related Structures:  
    3ZRP, 3ZRQ, 3ZRR

  • PubMed Abstract: 

    • The three-dimensional structure of the Sulfolobus solfataricus serine:pyruvate aminotransferase has been determined to 1.8 Å resolution. The structure of the protein is a homodimer that adopts the type I fold of pyridoxal 5'-phosphate (PLP)-dependent ...

    The three-dimensional structure of the Sulfolobus solfataricus serine:pyruvate aminotransferase has been determined to 1.8 Å resolution. The structure of the protein is a homodimer that adopts the type I fold of pyridoxal 5'-phosphate (PLP)-dependent aminotransferases. The structure revealed the PLP cofactor covalently bound in the active site to the active-site lysine in the internal aldimine form. The structure of the S. solfataricus enzyme was also determined with an amino form of the cofactor pyridoxamine 5'-phosphate bound in the active site and in complex with gabaculine, an aminotransferase inhibitor. These structures showed the changes in the enzyme active site during the course of the catalytic reaction. A comparison of the structure of the S. solfataricus enzyme with that of the closely related alanine:glyoxylate aminotransferase has identified structural features that are proposed to be responsible for the differences in substrate specificity between the two enzymes. These results have been complemented by biochemical studies of the substrate specificity and thermostability of the S. solfataricus enzyme.

    Organizational Affiliation: 

    Henry Wellcome Building for Biocatalysis, Biosciences, College of Life and Environmental Sciences, University of Exeter, Stocker Road, Exeter EX4 4QD, England.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
SERINE-PYRUVATE AMINOTRANSFERASE (AGXT)A, B384Saccharolobus solfataricus P2Mutation(s): 0 
Gene Names: agxT, SSO2597
EC: 2.6.1.51
Find proteins for Q97VM5 (Saccharolobus solfataricus (strain ATCC 35092 / DSM 1617 / JCM 11322 / P2))
Explore Q97VM5 
Go to UniProtKB:  Q97VM5
Protein Feature View
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  • Reference Sequence
Small Molecules
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.99 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.189 
  • Space Group: C 1 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 160.835α = 90
b = 55.205β = 111.95
c = 102.32γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-06-27
    Type: Initial release
  • Version 1.1: 2012-07-11
    Changes: Other