1YHA

CRYSTAL STRUCTURES OF Y41H AND Y41F MUTANTS OF GENE V PROTEIN FROM FF PHAGE SUGGEST POSSIBLE PROTEIN-PROTEIN INTERACTIONS IN GVP-SSDNA COMPLEX


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.170 
  • R-Value Observed: 0.170 

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Literature

Crystal structures of Y41H and Y41F mutants of gene V protein from Ff phage suggest possible protein-protein interactions in the GVP-ssDNA complex.

Guan, Y.Zhang, H.Konings, R.N.Hilbers, C.W.Terwilliger, T.C.Wang, A.H.

(1994) Biochemistry 33: 7768-7778

  • Primary Citation of Related Structures:  
    1YHB, 1YHA

  • PubMed Abstract: 
  • Gene V protein (GVP) encoded by the filamentous phage Ff (M13, fl, fd) is a homodimeric protein of 87 amino acids that binds to single-stranded DNA (ssDNA) nonspecifically and cooperatively. The structure (monoclinic C2 form) of the wild-type protein has been determined and refined at 1 ...

    Gene V protein (GVP) encoded by the filamentous phage Ff (M13, fl, fd) is a homodimeric protein of 87 amino acids that binds to single-stranded DNA (ssDNA) nonspecifically and cooperatively. The structure (monoclinic C2 form) of the wild-type protein has been determined and refined at 1.8-A resolution [Skinner et al. (1994) Proc. Natl. Acad. Sci. U.S.A. 91, 2071-2075]. The monomer structure consists of a somewhat distorted five-stranded beta-barrel core with three prominent loops: a DNA-binding loop, a dyad loop, and a dimer contact loop. The amino acid residue at position 41 plays an important role in the dimer-dimer interactions of the protein-ssDNA complex. Two Y41 mutant structures have been studied by X-ray crystallography. The Y41F GVP structure has been refined to an R-factor of 0.180 at 2.2-A resolution and is very similar to the wild-type (wt) structure (rmsd of all C alpha atoms = 0.30 A). In contrast, Y41H GVP forms a new crystal lattice in the space group P2(1)2(1)2(1) with a = 77.18 A, b = 84.17 A, and c = 28.62 A. Its structure has been solved by the molecular replacement method and refined to an R-factor of 0.170 at 2.5-A resolution. The two monomers of Y41H are crystallographically independent, and their structures remain similar to wt-GVP but with significant differences, particularly in the DNA-binding hairpin region. In both crystals, the loop (residues 36-43) that contains the Y41 residue is involved in the crystal dimer packings but in a different manner. The dimer-dimer contacts found in the wt-GVP crystal may be important for GVP aggregation in the absence of DNA. In the presence of DNA, the dimer-dimer contacts may switch to the type found in the Y41H crystal, allowing the GVP-ssDNA complex to form cooperatively. A model of the complex, consistent with existing biochemical and biophysical data, has been constructed from those crystal packing data.


    Related Citations: 
    • Structure of the Gene V Protein of Bacteriophage F1 Determined by Multiwavelength X-Ray Diffraction on the Selenomethionyl Protein
      Skinner, M.M., Zhang, H., Leschnitzer, D.H., Guan, Y., Bellamy, H., Sweet, R.M., Gray, C.W., Konings, R.N.H., Wang, A.H.-J., Terwilliger, T.C.
      (1994) Proc Natl Acad Sci U S A 91: 2071

    Organizational Affiliation

    Biophysics Division, University of Illinois at Urbana-Champaign 61801.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
GENE V PROTEINA, B87Enterobacteria phage f1Mutation(s): 0 
Gene Names: V
UniProt
Find proteins for P69543 (Enterobacteria phage f1)
Explore P69543 
Go to UniProtKB:  P69543
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Work: 0.170 
  • R-Value Observed: 0.170 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.18α = 90
b = 84.17β = 90
c = 28.62γ = 90
Software Package:
Software NamePurpose
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-06-22
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-11-29
    Changes: Derived calculations, Other, Structure summary