2C0N

Crystal Structure of A197 from STIV

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.172 

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


Literature

Structure of A197 from Sulfolobus Turreted Icosahedral Virus: A Crenarchaeal Viral Glycosyltransferase Exhibiting the Gt-A Fold.

Larson, E.T., Reiter, D., Young, M., Lawrence, C.M.

(2006) J Virol 80: 7636

  • DOI: 10.1128/JVI.00567-06
  • Primary Citation of Related Structures:  
    2C0N

  • PubMed Abstract: 

    • Sulfolobus turreted icosahedral virus (STIV) was the first icosahedral virus characterized from an archaeal host. It infects Sulfolobus species that thrive in the acidic hot springs (pH 2.9 to 3.9 and 72 to 92 degrees C) of Yellowstone National Park. The overall capsid architecture and the structure of its major capsid protein are very similar to those of the bacteriophage PRD1 and eukaryotic viruses Paramecium bursaria Chlorella virus 1 and adenovirus, suggesting a viral lineage that predates the three domains of life ...

    Sulfolobus turreted icosahedral virus (STIV) was the first icosahedral virus characterized from an archaeal host. It infects Sulfolobus species that thrive in the acidic hot springs (pH 2.9 to 3.9 and 72 to 92 degrees C) of Yellowstone National Park. The overall capsid architecture and the structure of its major capsid protein are very similar to those of the bacteriophage PRD1 and eukaryotic viruses Paramecium bursaria Chlorella virus 1 and adenovirus, suggesting a viral lineage that predates the three domains of life. The 17,663-base-pair, circular, double-stranded DNA genome contains 36 potential open reading frames, whose sequences generally show little similarity to other genes in the sequence databases. However, functional and evolutionary information may be suggested by a protein's three-dimensional structure. To this end, we have undertaken structural studies of the STIV proteome. Here we report our work on A197, the product of an STIV open reading frame. The structure of A197 reveals a GT-A fold that is common to many members of the glycosyltransferase superfamily. A197 possesses a canonical DXD motif and a putative catalytic base that are hallmarks of this family of enzymes, strongly suggesting a glycosyltransferase activity for A197. Potential roles for the putative glycosyltransferase activity of A197 and their evolutionary implications are discussed.

    Related Citations: 
    • The Structure of a Thermophilic Archaeal Virus Shows a Double-Stranded DNA Viral Capsid Type that Spans All Domains of Life
      Rice, G., Tang, L., Stedman, K., Roberto, F., Spuhler, J., Gillitzer, E., Johnson, J.E., Douglas, T., Young, M.
      (2004) Proc Natl Acad Sci U S A 101: 7716
    Organizational Affiliation: 

    Department of Chemistry and Biochemistry, Montana State University, Bozeman, MT 59715, USA.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
A197A203Sulfolobus turreted icosahedral virus 1Mutation(s): 0 
Gene Names: A197
UniProt
Find proteins for Q6Q0L5 (Sulfolobus turreted icosahedral virus 1)
Explore Q6Q0L5 
Go to UniProtKB:  Q6Q0L5
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6Q0L5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4
Download Ideal Coordinates CCD File 
D [auth A]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L		 Ligand Interaction
DIO
Query on DIO
Download Ideal Coordinates CCD File 
B [auth A],
C [auth A]		1,4-DIETHYLENE DIOXIDE
C4 H8 O2
RYHBNJHYFVUHQT-UHFFFAOYSA-N		 Ligand Interaction
NI
Query on NI
Download Ideal Coordinates CCD File 
E [auth A]NICKEL (II) ION
Ni
VEQPNABPJHWNSG-UHFFFAOYSA-N		 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE		A L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.86 Å
  • R-Value Free: 0.204 
  • R-Value Work: 0.171 
  • R-Value Observed: 0.172 
  • Space Group: I 2 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 66.422α = 90
b = 70.56β = 90
c = 81.266γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
SOLVEphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-09-29
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Advisory, Version format compliance
  • Version 1.2: 2018-06-27
    Changes: Data collection, Derived calculations
  • Version 1.3: 2019-05-08
    Changes: Data collection, Experimental preparation