The nonhelical tail domain is involved in promoting KRT5-KRT14 filaments to self-organize into large bundles and enhances the mechanical properties involved in resilience of keratin intermediate filaments in vitro.
[1]"Novel and recurrent mutations in keratin KRT5 and KRT14 genes in epidermolysis bullosa simplex: implications for disease phenotype and keratin filament assembly." Mueller F.B., Kuester W., Wodecki K., Almeida H. Jr., Bruckner-Tuderman L., Krieg T., Korge B.P., Arin M.J. Hum. Mutat. 27:719-720(2006). [2]"Epidermolysis bullosa simplex in Japanese and Korean patients: genetic studies in 19 cases." Yasukawa K., Sawamura D., Goto M., Nakamura H., Jung S.-Y., Kim S.-C., Shimizu H. Br. J. Dermatol. 155:313-317(2006) . [3]"Naegeli-Franceschetti-Jadassohn syndrome and dermatopathia pigmentosa reticularis: two allelic ectodermal dysplasias caused by dominant mutations in KRT14." Lugassy J., Itin P., Ishida-Yamamoto A., Holland K., Huson S., Geiger D., Hennies H.C., Indelman M., Bercovich D., Uitto J., Bergman R., McGrath J.A., Richard G., Sprecher E. Am. J. Hum. Genet. 79:724-730(2006).