6KZ1

Complex structure of Whirlin and Myosin XVa


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.69 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 

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This is version 1.1 of the entry. See complete history


Literature

Phase separation-mediated condensation of Whirlin-Myo15-Eps8 stereocilia tip complex.

Lin, L.Shi, Y.Wang, M.Wang, C.Lu, Q.Zhu, J.Zhang, R.

(2021) Cell Rep 34: 108770-108770

  • DOI: 10.1016/j.celrep.2021.108770
  • Primary Citation of Related Structures:  
    6KZ1

  • PubMed Abstract: 
  • Stereocilia, the mechanosensory organelles on the apical surface of hair cells, are necessary to detect sound and carry out mechano-electrical transduction. An electron-dense matrix is located at the distal tips of stereocilia and plays crucial roles in the regulation of stereocilia morphology ...

    Stereocilia, the mechanosensory organelles on the apical surface of hair cells, are necessary to detect sound and carry out mechano-electrical transduction. An electron-dense matrix is located at the distal tips of stereocilia and plays crucial roles in the regulation of stereocilia morphology. Mutations of the components in this tip complex density (TCD) have been associated with profound deafness. However, the mechanism underlying the formation of the TCD is largely unknown. Here, we discover that the specific multivalent interactions among the Whirlin-myosin 15 (Myo15)-Eps8 complex lead to the formation of the TCD-like condensates through liquid-liquid phase separation. The reconstituted TCD-like condensates effectively promote actin bundling. A deafness-associated mutation of Myo15 interferes with the condensates formation and consequently impairs actin bundling. Therefore, our study not only suggests that the TCD in hair cell stereocilia may form via phase separation but it also provides important clues for the possible mechanism underlying hearing loss.


    Organizational Affiliation

    State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, China. Electronic address: rgzhang@sibcb.ac.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
WhirlinA113Homo sapiensMutation(s): 0 
Gene Names: WHRNDFNB31KIAA1526
Find proteins for Q9P202 (Homo sapiens)
Explore Q9P202 
Go to UniProtKB:  Q9P202
NIH Common Fund Data Resources
PHAROS:  Q9P202
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Myosin XVaB14Homo sapiensMutation(s): 0 
Gene Names: MYO15AMYO15
Find proteins for Q9UKN7 (Homo sapiens)
Explore Q9UKN7 
Go to UniProtKB:  Q9UKN7
NIH Common Fund Data Resources
PHAROS:  Q9UKN7
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.69 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.179 
  • R-Value Observed: 0.180 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.974α = 90
b = 51.974β = 90
c = 70.445γ = 120
Software Package:
Software NamePurpose
XDSdata scaling
PHENIXrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-23
    Type: Initial release
  • Version 1.1: 2021-04-07
    Changes: Database references