CBS domain protein PAE2072 from Pyrobaculum aerophilum

Experimental Data Snapshot

  • Resolution: 2.10 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.200 

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Structures and Functional Implications of an AMP-Binding Cystathionine beta-Synthase Domain Protein from a Hyperthermophilic Archaeon

King, N.P.Lee, T.M.Sawaya, M.R.Cascio, D.Yeates, T.O.

(2008) J Mol Biol 380: 181-192

  • DOI: https://doi.org/10.1016/j.jmb.2008.04.073
  • Primary Citation of Related Structures:  
    2RIF, 2RIH

  • PubMed Abstract: 

    Cystathionine beta-synthase domains are found in a myriad of proteins from organisms across the tree of life and have been hypothesized to function as regulatory modules that sense the energy charge of cells. Here we characterize the structure and stability of PAE2072, a dimeric tandem cystathionine beta-synthase domain protein from the hyperthermophilic crenarchaeon Pyrobaculum aerophilum. Crystal structures of the protein in unliganded and AMP-bound forms, determined at resolutions of 2.10 and 2.35 A, respectively, reveal remarkable conservation of key functional features seen in the gamma subunit of the eukaryotic AMP-activated protein kinase. The structures also confirm the presence of a suspected intermolecular disulfide bond between the two subunits that is shown to stabilize the protein. Our AMP-bound structure represents a first step in investigating the function of a large class of uncharacterized prokaryotic proteins. In addition, this work extends previous studies that have suggested that, in certain thermophilic microbes, disulfide bonds play a key role in stabilizing intracellular proteins and protein-protein complexes.

  • Organizational Affiliation

    Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA 90095, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Conserved protein with 2 CBS domains
A, B
141Pyrobaculum aerophilumMutation(s): 0 
Gene Names: PAE2072
Find proteins for Q8ZVX8 (Pyrobaculum aerophilum (strain ATCC 51768 / DSM 7523 / JCM 9630 / CIP 104966 / NBRC 100827 / IM2))
Explore Q8ZVX8 
Go to UniProtKB:  Q8ZVX8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8ZVX8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.10 Å
  • R-Value Free: 0.243 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.200 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.778α = 90
b = 98.486β = 90
c = 51.568γ = 90
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-06-17
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2017-10-25
    Changes: Refinement description