1HQO

CRYSTAL STRUCTURE OF THE NITROGEN REGULATION FRAGMENT OF THE YEAST PRION PROTEIN URE2P

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.221 

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This is version 1.3 of the entry. See complete history. 


Literature

The crystal structure of the nitrogen regulation fragment of the yeast prion protein Ure2p.

Umland, T.C., Taylor, K.L., Rhee, S., Wickner, R.B., Davies, D.R.

(2001) Proc Natl Acad Sci U S A 98: 1459-1464

  • DOI: 10.1073/pnas.041607898
  • Primary Citation of Related Structures:  
    1HQO

  • PubMed Abstract: 

    • The yeast nonchromosomal gene [URE3] is due to a prion form of the nitrogen regulatory protein Ure2p. It is a negative regulator of nitrogen catabolism and acts by inhibiting the transcription factor Gln3p. Ure2p residues 1--80 are necessary for prion generation and propagation ...

    The yeast nonchromosomal gene [URE3] is due to a prion form of the nitrogen regulatory protein Ure2p. It is a negative regulator of nitrogen catabolism and acts by inhibiting the transcription factor Gln3p. Ure2p residues 1--80 are necessary for prion generation and propagation. The C-terminal fragment retains nitrogen regulatory activity, albeit somewhat less efficiently than the full-length protein, and it also lowers the frequency of prion generation. The crystal structure of this C-terminal fragment, Ure2p(97--354), at 2.3 A resolution is described here. It adopts the same fold as the glutathione S-transferase superfamily, consistent with their sequence similarity. However, Ure2p(97--354) lacks a properly positioned catalytic residue that is required for S-transferase activity. Residues within this regulatory fragment that have been indicated by mutational studies to influence prion generation have been mapped onto the three-dimensional structure, and possible implications for prion activity are discussed.

    Organizational Affiliation: 

    Laboratory of Molecular Biology, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, MD 20892-0560, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
URE2 PROTEIN A, B258Saccharomyces cerevisiaeMutation(s): 7 
Gene Names: URE2
EC: 1.8.4 (UniProt), 1.11.1.9 (UniProt)
Find proteins for P23202 (Saccharomyces cerevisiae (strain ATCC 204508 / S288c))
Explore P23202 
Go to UniProtKB:  P23202
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE		A,BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.221 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.31α = 90
b = 69.19β = 90
c = 149.99γ = 90
Software Package:
Software NamePurpose
SOLVEphasing
SnBphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
PHASESphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-02-14
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description