Keratin tetramers bind to form unit length filaments

Stable Identifier
Reaction [binding]
Homo sapiens
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Mammalian keratins form soluble short full-width filaments called unit length full-width particles (Parry et al. 2007), unit length filaments (ULFs) (Herrmann et al. 2002) or intermediate filament-like particles (Steinert 1991). These are formed by the lateral association of tetramers. ULFs are ~ 70 nm long, with a diameter of ~20 nm. The diameter shrinks during formation of filaments (Parry et al. 2001). X-ray diffraction suggests that ULFs are tube-like structures formed from eight tetramers in non-cornified cells (Parry et al. 2007). In cornified hair cells, the tetramers are thought to be arranged in a seven-member ring, with an eighth in the centre (Parry et al. 2007).

Literature References
PubMed ID Title Journal Year
17521629 Towards a molecular description of intermediate filament structure and assembly

Parry, DA, Strelkov, SV, Aebi, U, Burkhard, P, Herrmann, H

Exp. Cell Res. 2007
1691188 Differential extraction of keratin subunits and filaments from normal human epidermis

Eichner, R, Kahn, M

J. Cell Biol. 1990
Orthologous Events
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