1CHC

STRUCTURE OF THE C3HC4 DOMAIN BY 1H-NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; A NEW STRUCTURAL CLASS OF ZINC-FINGER


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structure of the C3HC4 domain by 1H-nuclear magnetic resonance spectroscopy. A new structural class of zinc-finger.

Barlow, P.N.Luisi, B.Milner, A.Elliott, M.Everett, R.

(1994) J Mol Biol 237: 201-211

  • DOI: 10.1006/jmbi.1994.1222
  • Primary Citation of Related Structures:  
    1CHC

  • PubMed Abstract: 
  • A recently identified sequence motif, referred to as "C3HC4" (also "RING finger" and "A Box") for its distinctive pattern of putative metal-binding residues, has been found in a wide range of proteins. In a previous paper we described the expression and purification of fragments encompassing this motif from the Vmw110 (IPC0) protein family ...

    A recently identified sequence motif, referred to as "C3HC4" (also "RING finger" and "A Box") for its distinctive pattern of putative metal-binding residues, has been found in a wide range of proteins. In a previous paper we described the expression and purification of fragments encompassing this motif from the Vmw110 (IPC0) protein family. We showed that the equine herpes virus protein binds zinc ions and adopts a beta beta alpha beta fold. We now report the tertiary structure of this domain in solution, as determined by two-dimensional 1H-NMR An amphipathic alpha-helix lies along one surface of a triple-stranded beta-sheet. Four pairs of metal-binding residues sequester two zincs at distinct tetrahedral sites. The first and third pairs bind one metal ion, while the second and fourth pairs bind the other, forming an interleaved whole. The first and the fourth pairs are contained within two prominent, well-defined loops related by an approximate dyad symmetry. Conserved residues within the helix, sheet and loops contribute to a compact hydrophobic core. The region comprising the first two beta-strands and the alpha-helix has remarkable structural similarity with a TFIIIA type of zinc finger, even though the C3HC4 domain appears not to bind specifically to DNA or RNA. Using site-directed mutagenesis we demonstrate that exposed polar side-chains of the C3HC4 alpha-helix are essential for trans-activation of gene expression by an intact herpes virus regulatory protein.


    Related Citations: 
    • A Novel Arrangement of Zinc-Binding Residues and Secondary Structure in the C3Hc4 Motif of an Alpha Herpes Virus Protein Family
      Everett, R.D., Barlow, P., Milner, A., Luisi, B., Orr, A., Hope, G., Lyon, D.
      (1993) J Mol Biol 234: 1038
    • A Novel Cysteine-Rich Sequence Motif
      Freemont, P.S., Handon, I.M., Trowsdale, J.
      (1991) Cell 64: 483

    Organizational Affiliation

    Department of Biochemistry, Oxford University, England, U.K.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
EQUINE HERPES VIRUS-1 RING DOMAINA68Equid alphaherpesvirus 1Mutation(s): 0 
EC: 2.3.2.27
Find proteins for P28990 (Equine herpesvirus 1 (strain Ab4p))
Explore P28990 
Go to UniProtKB:  P28990
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download Ideal Coordinates CCD File 
B [auth A], C [auth A]ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 
  • OLDERADO: 1CHC Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1994-04-30
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance