3N89

KH domains


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.789 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.259 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Four KH domains of the C. elegans Bicaudal-C ortholog GLD-3 form a globular structural platform.

Nakel, K.Hartung, S.A.Bonneau, F.Eckmann, C.R.Conti, E.

(2010) Rna 16: 2058-2067

  • DOI: 10.1261/rna.2315010

  • PubMed Abstract: 
  • Caenorhabditis elegans GLD-3 is a five K homology (KH) domain-containing protein involved in the translational control of germline-specific mRNAs during embryogenesis. GLD-3 interacts with the cytoplasmic poly(A)-polymerase GLD-2. The two proteins co ...

    Caenorhabditis elegans GLD-3 is a five K homology (KH) domain-containing protein involved in the translational control of germline-specific mRNAs during embryogenesis. GLD-3 interacts with the cytoplasmic poly(A)-polymerase GLD-2. The two proteins cooperate to recognize target mRNAs and convert them into a polyadenylated, translationally active state. We report the 2.8-Å-resolution crystal structure of a proteolytically stable fragment encompassing the KH2, KH3, KH4, and KH5 domains of C. elegans GLD-3. The structure reveals that the four tandem KH domains are organized into a globular structural unit. The domains are involved in extensive side-by-side interactions, similar to those observed in previous structures of dimeric KH domains, as well as head-to-toe interactions. Small-angle X-ray scattering reconstructions show that the N-terminal KH domain (KH1) forms a thumb-like protrusion on the KH2-KH5 unit. Although KH domains are putative RNA-binding modules, the KH region of GLD-3 is unable in isolation to cross-link RNA. Instead, the KH1 domain mediates the direct interaction with the poly(A)-polymerase GLD-2, pointing to a function of the KH region as a protein-protein interaction platform.


    Organizational Affiliation

    Department of Structural Cell Biology, Max-Planck-Institute of Biochemistry, D-82152 Martinsried, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Defective in germ line development protein 3, isoform a
A, B
376Caenorhabditis elegansMutation(s): 0 
Gene Names: gld-3
Find proteins for Q95ZK7 (Caenorhabditis elegans)
Go to UniProtKB:  Q95ZK7
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.789 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.259 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 159.504α = 90.00
b = 102.241β = 119.32
c = 83.608γ = 90.00
Software Package:
Software NamePurpose
PDB_EXTRACTdata extraction
XDSdata scaling
XDSdata reduction
SHARPphasing
CNSrefinement
XSCALEdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-09-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance