A novel MCPH1 isoform complements the defective chromosome condensation of human MCPH1-deficient cells.

ABSTRACT: Biallelic mutations in MCPH1 cause primary microcephaly (MCPH) with the cellular phenotype of defective chromosome condensation. MCPH1 encodes a multifunctional protein that notably is involved in brain development, regulation of chromosome condensation, and DNA damage response. In the present studies, we detected that MCPH1 encodes several distinct transcripts, including two major forms: full-length MCPH1 (MCPH1-FL) and a second transcript lacking the six 3' exons (MCPH1Δe9-14). Both variants show comparable tissue-specific expression patterns, demonstrate nuclear localization that is mediated independently via separate NLS motifs, and are more abundant in certain fetal than adult organs. In addition, the expression of either isoform complements the chromosome condensation defect found in

SUBMITTER: Gavvovidis I 

PROVIDER: S-EPMC3431399 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature