Functional analysis of HSF4 mutations found in patients with autosomal recessive congenital cataracts.

ABSTRACT:

Purpose

The goal of this study was to functionally evaluate three previously uncharacterized heat shock factor protein 4 (HSF4) mutations (c.595_599delGGGCC, c.1213C>T, c.1327+4A>G) encoding mutant HSF4 proteins (G199EfsX15, R405X, and M419GfsX29) with missing C-terminal ends. These HSF4 mutations were previously identified in families with congenital autosomal recessive cataracts.

Methods

FLAG-tagged recombinant wild type (WT) and mutant HSF4 proteins were analyzed using the protein stability assay, cellular immunofluorescence, Western blotting, electrophoretic mobility shift assay (EMSA), and reporter activation.

Results

HSF4 mutant proteins did not differ in the protein turnover rate when compared with WT HSF4. Immunofluorescence revealed that WT and mutant HSF4 pr

SUBMITTER: Merath K 

PROVIDER: S-EPMC3796937 | biostudies-literature | 2013 Oct

REPOSITORIES: biostudies-literature