Structure of apo KANK1 ankyrin domain

Experimental Data Snapshot

  • Resolution: 2.34 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 

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This is version 2.2 of the entry. See complete history


Structural basis for the recognition of kinesin family member 21A (KIF21A) by the ankyrin domains of KANK1 and KANK2 proteins.

Guo, Q.Liao, S.Zhu, Z.Li, Y.Li, F.Xu, C.

(2018) J Biol Chem 293: 557-566

  • DOI: https://doi.org/10.1074/jbc.M117.817494
  • Primary Citation of Related Structures:  
    5YBJ, 5YBU, 5YBV

  • PubMed Abstract: 

    A well-controlled microtubule organization is essential for intracellular transport, cytoskeleton maintenance, and cell development. KN motif and ankyrin repeat domain-containing protein 1 (KANK1), a member of KANK family, recruits kinesin family member 21A (KIF21A) to the cell cortex to control microtubule growth via its C-terminal ankyrin domain. However, how the KANK1 ankyrin domain recognizes KIF21A and whether other KANK proteins can also bind KIF21A remain unknown. Here, using a combination of structural, site-directed mutagenesis, and biochemical studies, we found that a stretch of ∼22 amino acids in KIF21A is sufficient for binding to KANK1 and its close homolog KANK2. We further solved the complex structure of the KIF21A peptide with either the KANK1 ankyrin domain or the KANK2 ankyrin domain. In each complex, KIF21A is recognized by two distinct pockets of the ankyrin domain and adopts helical conformations upon binding to the ankyrin domain. The elucidated KANK structures may advance our understanding of the role of KANK1 as a scaffolding molecule in controlling microtubule growth at the cell periphery.

  • Organizational Affiliation

    From the Hefei National Laboratory for Physical Sciences at the Microscale and School of Life Sciences, University of Science and Technology of China, Hefei 230027, China and.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
KN motif and ankyrin repeat domain-containing protein 1253Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q14678 (Homo sapiens)
Explore Q14678 
Go to UniProtKB:  Q14678
PHAROS:  Q14678
GTEx:  ENSG00000107104 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14678
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.34 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.212 
  • R-Value Observed: 0.214 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 42.903α = 90
b = 47.602β = 90
c = 137.745γ = 90
Software Package:
Software NamePurpose
HKL-2000data processing
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-12-06
    Type: Initial release
  • Version 2.0: 2017-12-13
    Changes: Database references, Polymer sequence
  • Version 2.1: 2018-01-24
    Changes: Database references
  • Version 2.2: 2024-03-27
    Changes: Data collection, Database references