4BY2 | pdb_00004by2

SAS-4 (dCPAP) TCP domain in complex with a Proline Rich Motif of Ana2 (dSTIL) of Drosophila Melanogaster

• PDB DOI: https://doi.org/10.2210/pdb4BY2/pdb

• Classification: STRUCTURAL PROTEIN
• Organism(s): Drosophila melanogaster
• Expression System: Escherichia coli B
• Mutation(s): No 


• Deposited: 2013-07-17 Released: 2013-09-18 
• Deposition Author(s): Cottee, M.A., Muschalik, N., Wong, Y.L., Johnson, C.M., Johnson, S., Andreeva, A., Oegema, K., Lea, S.M., Raff, J.W., van Breugel, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.57 Å
• R-Value Free: 
  0.263 (Depositor), 0.286 (DCC) 
• R-Value Work: 
  0.245 (Depositor) 
• R-Value Observed: 
  0.246 (Depositor) 

Literature

Crystal structures of the CPAP/STIL complex reveal its role in centriole assembly and human microcephaly.

Cottee, M.A., Muschalik, N., Wong, Y.L., Johnson, C.M., Johnson, S., Andreeva, A., Oegema, K., Lea, S.M., Raff, J.W., van Breugel, M.

(2013) Elife 2: e01071-e01071

• PubMed: 24052813 
• DOI: https://doi.org/10.7554/eLife.01071
• Primary Citation Related Structures: 
  4BXP, 4BXQ, 4BXR, 4BY2


• PubMed Abstract: 
  

  Centrioles organise centrosomes and template cilia and flagella. Several centriole and centrosome proteins have been linked to microcephaly (MCPH), a neuro-developmental disease associated with small brain size. CPAP (MCPH6) and STIL (MCPH7) are required for centriole assembly, but it is unclear how mutations in them lead to microcephaly. We show that the TCP domain of CPAP constitutes a novel proline recognition domain that forms a 1:1 complex with a short, highly conserved target motif in STIL. Crystal structures of this complex reveal an unusual, all-β structure adopted by the TCP domain and explain how a microcephaly mutation in CPAP compromises complex formation. Through point mutations, we demonstrate that complex formation is essential for centriole duplication in vivo. Our studies provide the first structural insight into how the malfunction of centriole proteins results in human disease and also reveal that the CPAP-STIL interaction constitutes a conserved key step in centriole biogenesis. DOI:http://dx.doi.org/10.7554/eLife.01071.001.

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Organizational Affiliation: 
• Sir William Dunn School of Pathology , University of Oxford , Oxford , United Kingdom.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 85.88 kDa 
• Atom Count: 3,859 
• Modeled Residue Count: 464 
• Deposited Residue Count: 756 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ANASTRAL SPINDLE 2, SAS 4	A, B, C	252	Drosophila melanogaster	Mutation(s): 0
UniProt
Find proteins for Q9VI72 (Drosophila melanogaster) Explore Q9VI72  Go to UniProtKB:  Q9VI72
Find proteins for Q9XZ31 (Drosophila melanogaster) Explore Q9XZ31  Go to UniProtKB:  Q9XZ31
UniProt Groups	Q9VI72Q9XZ31

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EDO	D [auth B]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.57 Å
• R-Value Free:  0.263 (Depositor), 0.286 (DCC) 
• R-Value Work:  0.245 (Depositor) 
• R-Value Observed: 0.246 (Depositor) 

Space Group: P 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 58.64	α = 86.96
b = 69.91	β = 88.64
c = 69.98	γ = 67.69

Software Package:

Software Name	Purpose
BUSTER	refinement
XDS	data reduction
Aimless	data scaling
autoSHARP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-09-18 
Deposition Author(s): Cottee, M.A., Muschalik, N., Wong, Y.L., Johnson, C.M., Johnson, S., Andreeva, A., Oegema, K., Lea, S.M., Raff, J.W., van Breugel, M.

Revision History  

• Version 1.0: 2013-09-18
  Type: Initial release
  
• Version 1.1: 2013-10-02
  Changes: Database references
• Version 1.2: 2017-03-15
  Changes: Source and taxonomy
• Version 1.3: 2017-12-20
  Changes: Database references, Structure summary
• Version 1.4: 2018-01-17
  Changes: Database references
• Version 1.5: 2019-05-08
  Changes: Data collection, Experimental preparation
• Version 1.6: 2024-05-08
  Changes: Data collection, Database references, Derived calculations, Other