8K4D

Structure of the SA2/Scc1/CENP_U complex

• PDB DOI: https://doi.org/10.2210/pdb8K4D/pdb

• Classification: CELL CYCLE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2023-07-18 Released: 2024-07-24 
• Deposition Author(s): Liu, M.J., He, X.J.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.52 Å
• R-Value Free: 0.269 
• R-Value Work: 0.220 
• R-Value Observed: 0.223 

Starting Model: experimental

Literature

The CENP-O complex links inner kinetochore to centromere cohesion

Liu, M.J., He, X.J.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 130.74 kDa 
• Atom Count: 8,141 
• Modelled Residue Count: 1,002 
• Deposited Residue Count: 1,130 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cohesin subunit SA-2	A	980	Homo sapiens	Mutation(s): 0  Gene Names: SA2
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N3U4 (Homo sapiens) Explore Q8N3U4  Go to UniProtKB:  Q8N3U4
PHAROS:  Q8N3U4 GTEx:  ENSG00000101972

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
64-kDa C-terminal product	B	141	Homo sapiens	Mutation(s): 0  Gene Names: SCC1
UniProt & NIH Common Fund Data Resources
Find proteins for O60216 (Homo sapiens) Explore O60216  Go to UniProtKB:  O60216
PHAROS:  O60216 GTEx:  ENSG00000164754

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
CENP-U	C	9	Homo sapiens	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.52 Å
• R-Value Free: 0.269 
• R-Value Work: 0.220 
• R-Value Observed: 0.223 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 79.321	α = 90
b = 132.615	β = 90
c = 148.001	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
XDS	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-07-24 
Deposition Author(s): Liu, M.J., He, X.J.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2024-07-24
  Type: Initial release