4CPC

Crystal structure of human synaptonemal complex protein SYCP3


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.24 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.195 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

A Molecular Model for the Role of Sycp3 in Meiotic Chromosome Organisation.

Syrjanen, J.L.Pellegrini, L.Davies, O.R.

(2014) Elife 3: --

  • DOI: 10.7554/eLife.02963

  • PubMed Abstract: 
  • The synaptonemal complex (SC) is an evolutionarily-conserved protein assembly that holds together homologous chromosomes during prophase of the first meiotic division. Whilst essential for meiosis and fertility, the molecular structure of the SC has ...

    The synaptonemal complex (SC) is an evolutionarily-conserved protein assembly that holds together homologous chromosomes during prophase of the first meiotic division. Whilst essential for meiosis and fertility, the molecular structure of the SC has proved resistant to elucidation. The SC protein SYCP3 has a crucial but poorly understood role in establishing the architecture of the meiotic chromosome. Here we show that human SYCP3 forms a highly-elongated helical tetramer of 20 nm length. N-terminal sequences extending from each end of the rod-like structure bind double-stranded DNA, enabling SYCP3 to link distant sites along the sister chromatid. We further find that SYCP3 self-assembles into regular filamentous structures that resemble the known morphology of the SC lateral element. Together, our data form the basis for a model in which SYCP3 binding and assembly on meiotic chromosomes leads to their organisation into compact structures compatible with recombination and crossover formation.


    Organizational Affiliation

    Department of Biochemistry, University of Cambridge, Cambridge, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
SYNAPTONEMAL COMPLEX PROTEIN 3
A, B, C, D, E, F, G, H
167Homo sapiensMutation(s): 0 
Gene Names: SYCP3 (SCP3)
Find proteins for Q8IZU3 (Homo sapiens)
Go to Gene View: SYCP3
Go to UniProtKB:  Q8IZU3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.24 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.195 
  • Space Group: P 1
Unit Cell:
Length (Å)Angle (°)
a = 49.140α = 66.53
b = 92.381β = 82.32
c = 103.367γ = 76.53
Software Package:
Software NamePurpose
PHENIXphasing
Aimlessdata scaling
BUSTER-TNTphasing
XDSdata reduction
BUSTERrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2014-07-02
    Type: Initial release
  • Version 1.1: 2014-10-08
    Type: Database references