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 1.2 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: 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 ...

    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 Molecular Biophysics and Biochemistry, Yale University, New Haven, CT, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Keratin, type II cytoskeletal 1A107Homo 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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04264
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Keratin, type I cytoskeletal 10B104Homo 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
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP13645
Protein Feature View
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  • Reference Sequence
Small Molecules
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

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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