1FRE

XNF7 BBOX, DEVELOPMENTAL PROTEIN, PH 7.5, 30 C, WITH ZINC, NMR, 1 STRUCTURE


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

Novel topology of a zinc-binding domain from a protein involved in regulating early Xenopus development.

Borden, K.L.Lally, J.M.Martin, S.R.O'Reilly, N.J.Etkin, L.D.Freemont, P.S.

(1995) EMBO J. 14: 5947-5956


  • PubMed Abstract: 
  • Xenopus nuclear factor XNF7, a maternally expressed protein, functions in patterning of the embryo. XNF7 contains a number of defined protein domains implicated in the regulation of some developmental processes. Among these is a tripartite motif comp ...

    Xenopus nuclear factor XNF7, a maternally expressed protein, functions in patterning of the embryo. XNF7 contains a number of defined protein domains implicated in the regulation of some developmental processes. Among these is a tripartite motif comprising a zinc-binding RING finger and B-box domain next to a predicted alpha-helical coiled-coil domain. Interestingly, this motif is found in a variety of protein including several proto-oncoproteins. Here we describe the solution structure of the XNF7 B-box zinc-binding domain determined at physiological pH by 1H NMR methods. The B-box structure represents the first three-dimensional structure of this new motif and comprises a monomer have two beta-strands, two helical turns and three extended loop regions packed in a novel topology. The r.m.s. deviation for the best 18 structures is 1.15 A for backbone atoms and 1.94 A for all atoms. Structure calculations and biochemical data shows one zinc atom ligated in a Cys2-His2 tetrahedral arrangement. We have used mutant peptides to determine the metal ligation scheme which surprisingly shows that not all of the seven conserved cysteines/histidines in the B-box motif are involved in metal ligation. The B-box structure is not similar in tertiary fold to any other known zinc-binding motif.


    Related Citations: 
    • The Cloning and Characterization of a Maternally Expressed Novel Zinc Finger Nuclear Phosphoprotein (Xnf7) in Xenopus Laevis
      Reddy, B.A.,Kloc, M.,Etkin, L.
      (1991) Dev.Biol. 148: 107
    • The Ring Finger. A Novel Protein Sequence Motif Related to the Zinc Finger
      Freemont, P.S.
      (1993) Ann.N.Y.Acad.Sci. 684: 174


    Organizational Affiliation

    Laboratory of Molecular Structure, National Institute for Medical Research, London, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
NUCLEAR FACTOR XNF7
A
42Xenopus laevisN/A
Find proteins for Q92021 (Xenopus laevis)
Go to UniProtKB:  Q92021
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: 1997-02-12
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance