8JJ9

Human FAM91A1 N terminal domain in complex with TBC1D23


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.225 

Starting Model: in silico
View more details

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

FAM91A1-TBC1D23 complex structure reveals human genetic variations susceptible for PCH.

Zhao, L.Deng, H.Yang, Q.Tang, Y.Zhao, J.Li, P.Zhang, S.Yong, X.Li, T.Billadeau, D.D.Jia, D.

(2023) Proc Natl Acad Sci U S A 120: e2309910120-e2309910120

  • DOI: https://doi.org/10.1073/pnas.2309910120
  • Primary Citation of Related Structures:  
    8JJ9

  • PubMed Abstract: 

    Pontocerebellar hypoplasia (PCH) is a group of rare neurodevelopmental disorders with limited diagnostic and therapeutic options. Mutations in WDR11, a subunit of the FAM91A1 complex, have been found in patients with PCH-like symptoms; however, definitive evidence that the mutations are causal is still lacking. Here, we show that depletion of FAM91A1 results in developmental defects in zebrafish similar to that of TBC1D23, an established PCH gene. FAM91A1 and TBC1D23 directly interact with each other and cooperate to regulate endosome-to-Golgi trafficking of KIAA0319L, a protein known to regulate axonal growth. Crystal structure of the FAM91A1-TBC1D23 complex reveals that TBC1D23 binds to a conserved surface on FAM91A1 by assuming a Z-shaped conformation. More importantly, the interaction between FAM91A1 and TBC1D23 can be used to predict the risk of certain TBC1D23-associated mutations to PCH. Collectively, our study provides a molecular basis for the interaction between TBC1D23 and FAM91A1 and suggests that disrupted endosomal trafficking underlies multiple PCH subtypes.


  • Organizational Affiliation

    Key Laboratory of Birth Defects and Related Diseases of Women and Children, Department of Paediatrics, West China Second University Hospital, State Key Laboratory of Biotherapy and Collaborative Innovation Center of Biotherapy, Sichuan University, Chengdu 610041, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Protein FAM91A1
A, B
312Homo sapiensMutation(s): 0 
Gene Names: FAM91A1
UniProt & NIH Common Fund Data Resources
Find proteins for Q658Y4 (Homo sapiens)
Explore Q658Y4 
Go to UniProtKB:  Q658Y4
PHAROS:  Q658Y4
GTEx:  ENSG00000176853 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ658Y4
Sequence Annotations
Expand
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
TBC1 domain family member 23
C, D
21Homo sapiensMutation(s): 0 
Gene Names: TBC1D23
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NUY8 (Homo sapiens)
Explore Q9NUY8 
Go to UniProtKB:  Q9NUY8
PHAROS:  Q9NUY8
GTEx:  ENSG00000036054 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9NUY8
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.51 Å
  • R-Value Free: 0.277 
  • R-Value Work: 0.225 
  • R-Value Observed: 0.225 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 88.212α = 90
b = 93.558β = 90
c = 111.514γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
DIALSdata scaling
PDB_EXTRACTdata extraction
autoPROCdata reduction
SHELXSphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Natural Science Foundation of China (NSFC)China92254302

Revision History  (Full details and data files)

  • Version 1.0: 2024-04-24
    Type: Initial release