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

  • 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 ...

    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 Cysteine-Rich Sequence Motif
      Freemont, P.S.,Handon, I.M.,Trowsdale, J.
      (1991) Cell 64: 483
    • 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


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
EQUINE HERPES VIRUS-1 RING DOMAIN
A
68Equine herpesvirus 1 (strain Ab4p)Mutation(s): 0 
Gene Names: 63
EC: 2.3.2.27
Find proteins for P28990 (Equine herpesvirus 1 (strain Ab4p))
Go to UniProtKB:  P28990
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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