Morphologic and molecular characterization of two novel Krt71 (Krt2-6g) mutations: Krt71 rco12 and Krt71 rco13

Morphologic and molecular characterization of two novel Krt71 (Krt2-6g) mutations: Krt71 rco12... We have analyzed two novel mouse mutant strains, Rco12 and Rco13, displaying a wavy pelage and curly vibrissae that have been identified in an ENU screen for dominant mutations affecting the pelage. The mutations were mapped to mouse Chromosome 15 and identified as missense point mutations in the first exon of the Krt71 (formerly called Krt2-6g) gene causing alterations of amino acid residue 143 from alanine to glycine (Rco12) and residue 146 from isoleucine to phenylalanine. The morphologic analyses demonstrated that both mutations cause identical phenotypes leading to the formation of filamentous aggregates in Henle’s and Huxley’s layers of the inner root sheath (IRS) of the hair follicle that leads to the bending of the hair shaft. Both novel mutations are located in the immediate vicinity of previously identified mutations in murine Krt71 that cause similar phenotypes and alter the helix initiation motif of the keratin. The characterization of these mutants demonstrates the importance of this Krt71 domain for the formation of linear IRS intermediate filaments. Mammalian Genome Springer Journals

Morphologic and molecular characterization of two novel Krt71 (Krt2-6g) mutations: Krt71 rco12 and Krt71 rco13

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Copyright © 2006 by Springer Science+Business Media, Inc.
Life Sciences; Anatomy; Cell Biology; Zoology
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