Enhanced Degradation of Misfolded Proteins Promotes Tumorigenesis.

ABSTRACT: An adequate cellular capacity to degrade misfolded proteins is critical for cell survival and organismal health. A diminished capacity is associated with aging and neurodegenerative diseases; however, the consequences of an enhanced capacity remain undefined. Here, we report that the ability to clear misfolded proteins is increased during oncogenic transformation and is reduced upon tumor cell differentiation. The augmented capacity mitigates oxidative stress associated with oncogenic growth and is required for both the initiation and maintenance of malignant phenotypes. We show that tripartite motif-containing (TRIM) proteins select misfolded proteins for proteasomal degradation. The higher degradation power in tumor cells is attributed to the upregulation of the proteasome and especially

SUBMITTER: Chen L 

PROVIDER: S-EPMC5603913 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature