6E2J

Crystal structure of the heterocomplex between human keratin 1 coil 1B containing S233L mutation and wild-type human keratin 10 coil 1B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.271 
  • R-Value Observed: 0.272 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Human keratin 1/10-1B tetramer structures reveal a knob-pocket mechanism in intermediate filament assembly.

Eldirany, S.A.Ho, M.Hinbest, A.J.Lomakin, I.B.Bunick, C.G.

(2019) EMBO J 38

  • DOI: https://doi.org/10.15252/embj.2018100741
  • Primary Citation of Related Structures:  
    6E2J, 6EC0

  • PubMed Abstract: 

    To characterize keratin intermediate filament assembly mechanisms at atomic resolution, we determined the crystal structure of wild-type human keratin-1/keratin-10 helix 1B heterotetramer at 3.0 Å resolution. It revealed biochemical determinants for the A 11 mode of axial alignment in keratin filaments. Four regions on a hydrophobic face of the K1/K10-1B heterodimer dictated tetramer assembly: the N-terminal hydrophobic pocket (defined by L227 K1 , Y230 K1 , F231 K1 , and F234 K1 ), the K10 hydrophobic stripe, K1 interaction residues, and the C-terminal anchoring knob (formed by F314 K1 and L318 K1 ). Mutation of both knob residues to alanine disrupted keratin 1B tetramer and full-length filament assembly. Individual knob residue mutant F314A K1 , but not L318A K1 , abolished 1B tetramer formation. The K1-1B knob/pocket mechanism is conserved across keratins and many non-keratin intermediate filaments. To demonstrate how pathogenic mutations cause skin disease by altering filament assembly, we additionally determined the 2.39 Å structure of K1/10-1B containing a S233L K1 mutation linked to epidermolytic palmoplantar keratoderma. Light scattering and circular dichroism measurements demonstrated enhanced aggregation of K1 S233L /K10-1B in solution without affecting secondary structure. The K1 S233L /K10-1B octamer structure revealed S233L K1 causes aberrant hydrophobic interactions between 1B tetramers.


  • Organizational Affiliation

    Department of Dermatology, Yale University, New Haven, CT, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Keratin, type II cytoskeletal 1107Homo sapiensMutation(s): 1 
Gene Names: KRT1KRTA
UniProt & NIH Common Fund Data Resources
Find proteins for P04264 (Homo sapiens)
Explore P04264 
Go to UniProtKB:  P04264
PHAROS:  P04264
GTEx:  ENSG00000167768 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04264
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Keratin, type I cytoskeletal 10104Homo sapiensMutation(s): 0 
Gene Names: KRT10KPP
UniProt & NIH Common Fund Data Resources
Find proteins for P13645 (Homo sapiens)
Explore P13645 
Go to UniProtKB:  P13645
PHAROS:  P13645
GTEx:  ENSG00000186395 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13645
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.39 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.271 
  • R-Value Observed: 0.272 
  • Space Group: P 64 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 93.296α = 90
b = 93.296β = 90
c = 124.742γ = 120
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling
MOLREPphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS)United StatesK08-AR070290
Other privateUnited StatesFoundation for Ichthyosis & Related Skin Types

Revision History  (Full details and data files)

  • Version 1.0: 2019-05-15
    Type: Initial release
  • Version 1.1: 2019-06-12
    Changes: Data collection, Database references
  • Version 1.2: 2019-12-11
    Changes: Author supporting evidence
  • Version 1.3: 2024-03-13
    Changes: Data collection, Database references