4LVR

Crystal structure of IFT81 N-terminal domain

• PDB DOI: https://doi.org/10.2210/pdb4LVR/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Chlamydomonas reinhardtii
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2013-07-26 Released: 2013-09-11 
• Deposition Author(s): Bhogaraju, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.285 
• R-Value Work: 0.252 
• R-Value Observed: 0.255 

Literature

Molecular Basis of Tubulin Transport Within the Cilium by IFT74 and IFT81.

Bhogaraju, S., Cajanek, L., Fort, C., Blisnick, T., Weber, K., Taschner, M., Mizuno, N., Lamla, S., Bastin, P., Nigg, E.A., Lorentzen, E.

(2013) Science 341: 1009-1012

• PubMed: 23990561 
• DOI: https://doi.org/10.1126/science.1240985
• Primary Citation of Related Structures:  
  4LVP, 4LVR


• PubMed Abstract: 
  

  Intraflagellar transport (IFT) of ciliary precursors such as tubulin from the cytoplasm to the ciliary tip is involved in the construction of the cilium, a hairlike organelle found on most eukaryotic cells. However, the molecular mechanisms of IFT are poorly understood. Here, we found that the two core IFT proteins IFT74 and IFT81 form a tubulin-binding module and mapped the interaction to a calponin homology domain of IFT81 and a highly basic domain in IFT74. Knockdown of IFT81 and rescue experiments with point mutants showed that tubulin binding by IFT81 was required for ciliogenesis in human cells.

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Organizational Affiliation: 

Department of Structural Cell Biology, Max Planck Institute of Biochemistry, Martinsried, Germany.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 2 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 14.18 kDa 
• Atom Count: 922 
• Modelled Residue Count: 120 
• Deposited Residue Count: 124 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Intraflagellar transport protein 81	A	124	Chlamydomonas reinhardtii	Mutation(s): 0  Gene Names: IFT81, CHLREDRAFT_138649
UniProt
Find proteins for Q68RJ5 (Chlamydomonas reinhardtii) Explore Q68RJ5  Go to UniProtKB:  Q68RJ5

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Free: 0.285 
• R-Value Work: 0.252 
• R-Value Observed: 0.255 
• Space Group: P 6₄ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 75.07	α = 90
b = 75.07	β = 90
c = 93.33	γ = 120

Software Package:

Software Name	Purpose
XDS	data scaling
PHENIX	model building
PHENIX	refinement
XDS	data reduction
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2013-09-11 
Deposition Author(s): Bhogaraju, S.

Revision History  

• Version 1.0: 2013-09-11
  Type: Initial release
  
• Version 1.1: 2024-02-28
  Changes: Data collection, Database references