5TFM

Crystal Structure of Human Cadherin-23 EC6-8


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.198 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Zooming in on Cadherin-23: Structural Diversity and Potential Mechanisms of Inherited Deafness.

Jaiganesh, A.De-la-Torre, P.Patel, A.A.Termine, D.J.Velez-Cortes, F.Chen, C.Sotomayor, M.

(2018) Structure 26: 1210

  • DOI: 10.1016/j.str.2018.06.003
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cadherin-23 (CDH23) is an essential component of hair-cell tip links, fine filaments that mediate inner-ear mechanotransduction. The extracellular domain of CDH23 forms about three-fourths of the tip link with 27 extracellular cadherin (EC) repeats t ...

    Cadherin-23 (CDH23) is an essential component of hair-cell tip links, fine filaments that mediate inner-ear mechanotransduction. The extracellular domain of CDH23 forms about three-fourths of the tip link with 27 extracellular cadherin (EC) repeats that are structurally similar but not identical to each other. Calcium (Ca 2+ ) coordination at the EC linker regions is key for tip-link elasticity and function. There are ∼116 sites in CDH23 affected by deafness-causing mutations, many of which alter conserved Ca 2+ -binding residues. Here we present crystal structures showing 18 CDH23 EC repeats, including the most and least conserved, a fragment carrying disease mutations, and EC repeats with non-canonical Ca 2+ -binding motif sequences and unusual secondary structure. Complementary experiments show deafness mutations' effects on stability and affinity for Ca 2+ . Additionally, a model of nine contiguous CDH23 EC repeats reveals helicity and potential parallel dimerization faces. Overall, our studies provide detailed structural insight into CDH23 function in mechanotransduction.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, The Ohio State University, 484 West 12th Avenue, Columbus, OH 43210, USA; Biophysics Graduate Program, The Ohio State University, Columbus, OH 43210, USA. Electronic address: sotomayor.8@osu.edu.,Department of Chemistry and Biochemistry, The Ohio State University, 484 West 12th Avenue, Columbus, OH 43210, USA.,Department of Chemistry and Biochemistry, The Ohio State University, 484 West 12th Avenue, Columbus, OH 43210, USA; Biophysics Graduate Program, The Ohio State University, Columbus, OH 43210, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cadherin-23
A
339Homo sapiensMutation(s): 0 
Gene Names: CDH23 (KIAA1774, KIAA1812)
Find proteins for Q9H251 (Homo sapiens)
Go to Gene View: CDH23
Go to UniProtKB:  Q9H251
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.92 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.198 
  • Space Group: P 32 1 2
Unit Cell:
Length (Å)Angle (°)
a = 93.407α = 90.00
b = 93.407β = 90.00
c = 122.386γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
REFMACrefinement
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute on Deafness and Other Communication DisordersUnited StatesDC012534

Revision History 

  • Version 1.0: 2017-12-27
    Type: Initial release
  • Version 1.1: 2018-08-01
    Type: Data collection, Database references
  • Version 1.2: 2018-09-19
    Type: Data collection, Database references, Source and taxonomy