Identification of TSG101 functional domains and p21 loci required for TSG101-mediated p21 gene regulation.

ABSTRACT: TSG101 (tumor susceptibility gene 101) is a multi-domain protein known to act in the cell nucleus, cytoplasm, and periplasmic membrane. Remarkably, TSG101, whose location within cells varies with the stage of the cell cycle, affects biological events as diverse as cell growth and proliferation, gene expression, cytokinesis, and endosomal trafficking. The functions of TSG101 additionally are recruited for viral and microvesicle budding and for intracellular survival of invading bacteria. Here we report that the TSG101 protein also interacts with and down-regulates the promoter of the p21 (CIP1/WAF1) tumor suppressor gene, and identify a p21 locus and TSG101 domains that mediate this interaction. TSG101 deficiency in Saos-2 human osteosarcoma cells was accompanied by an increased abundance o

SUBMITTER: Lin YS 

PROVIDER: S-EPMC3823576 | biostudies-literature | 2013

REPOSITORIES: biostudies-literature