6F5X

Crystal structure of the SYCP1 N-terminal head-to-head assembly in closed conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.91 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.227 
  • R-Value Observed: 0.228 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of meiotic chromosome synapsis through SYCP1 self-assembly.

Dunce, J.M.Dunne, O.M.Ratcliff, M.Millan, C.Madgwick, S.Uson, I.Davies, O.R.

(2018) Nat Struct Mol Biol 25: 557-569

  • DOI: 10.1038/s41594-018-0078-9
  • Primary Citation of Related Structures:  
    6F5X, 6F63, 6F62, 6F64

  • PubMed Abstract: 
  • Meiotic chromosomes adopt unique structures in which linear arrays of chromatin loops are bound together in homologous chromosome pairs by a supramolecular protein assembly, the synaptonemal complex. This three-dimensional scaffold provides the essential structural framework for genetic exchange by crossing over and subsequent homolog segregation ...

    Meiotic chromosomes adopt unique structures in which linear arrays of chromatin loops are bound together in homologous chromosome pairs by a supramolecular protein assembly, the synaptonemal complex. This three-dimensional scaffold provides the essential structural framework for genetic exchange by crossing over and subsequent homolog segregation. The core architecture of the synaptonemal complex is provided by SYCP1. Here we report the structure and self-assembly mechanism of human SYCP1 through X-ray crystallographic and biophysical studies. SYCP1 has an obligate tetrameric structure in which an N-terminal four-helical bundle bifurcates into two elongated C-terminal dimeric coiled-coils. This building block assembles into a zipper-like lattice through two self-assembly sites. N-terminal sites undergo cooperative head-to-head assembly in the midline, while C-terminal sites interact back to back on the chromosome axis. Our work reveals the underlying molecular structure of the synaptonemal complex in which SYCP1 self-assembly generates a supramolecular lattice that mediates meiotic chromosome synapsis.


    Organizational Affiliation

    Institute for Cell and Molecular Biosciences, Newcastle University, Newcastle upon Tyne, UK. owen.davies@newcastle.ac.uk.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Synaptonemal complex protein 1 A78Homo sapiensMutation(s): 0 
Gene Names: SYCP1SCP1
Find proteins for Q15431 (Homo sapiens)
Explore Q15431 
Go to UniProtKB:  Q15431
NIH Common Fund Data Resources
PHAROS:  Q15431
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
PGE
Query on PGE

Download Ideal Coordinates CCD File 
A
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
IOD
Query on IOD

Download Ideal Coordinates CCD File 
A
IODIDE ION
I
XMBWDFGMSWQBCA-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 28.64α = 90
b = 39.38β = 90
c = 165.77γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
SHELXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Wellcome Trust and Royal SocietyUnited Kingdom104158/Z/14/Z

Revision History  (Full details and data files)

  • Version 1.0: 2018-06-06
    Type: Initial release
  • Version 1.1: 2018-07-04
    Changes: Data collection, Database references
  • Version 1.2: 2018-08-01
    Changes: Data collection, Database references