Unknown

Dataset Information

0

PH-Induced Folding of the Caspase-Cleaved Par-4 Tumor Suppressor: Evidence of Structure Outside of the Coiled Coil Domain.


ABSTRACT: Prostate apoptosis response-4 (Par-4) is a 38 kDa largely intrinsically disordered tumor suppressor protein that functions in cancer cell apoptosis. Par-4 down-regulation is often observed in cancer while up-regulation is characteristic of neurodegenerative conditions such as Alzheimer's disease. Cleavage of Par-4 by caspase-3 activates tumor suppression via formation of an approximately 25 kDa fragment (cl-Par-4) that enters the nucleus and inhibits Bcl-2 and NF-?B, which function in pro-survival pathways. Here, we have investigated the structure of cl-Par-4 using biophysical techniques including circular dichroism (CD) spectroscopy, dynamic light scattering (DLS), and intrinsic tyrosine fluorescence. The results demonstrate pH-dependent folding of cl-Par-4, with high disorder and aggregation at neutral pH, but a largely folded, non-aggregated conformation at acidic pH.

SUBMITTER: Clark AM 

PROVIDER: S-EPMC6316887 | biostudies-literature | 2018 Dec

REPOSITORIES: biostudies-literature

altmetric image

Publications

pH-Induced Folding of the Caspase-Cleaved Par-4 Tumor Suppressor: Evidence of Structure Outside of the Coiled Coil Domain.

Clark Andrea M AM   Ponniah Komala K   Warden Meghan S MS   Raitt Emily M EM   Yawn Andrea C AC   Pascal Steven M SM  

Biomolecules 20181204 4


Prostate apoptosis response-4 (Par-4) is a 38 kDa largely intrinsically disordered tumor suppressor protein that functions in cancer cell apoptosis. Par-4 down-regulation is often observed in cancer while up-regulation is characteristic of neurodegenerative conditions such as Alzheimer's disease. Cleavage of Par-4 by caspase-3 activates tumor suppression via formation of an approximately 25 kDa fragment (cl-Par-4) that enters the nucleus and inhibits Bcl-2 and NF-ƙB, which function in pro-surviv  ...[more]

Similar Datasets

| S-EPMC7878764 | biostudies-literature
2021-07-21 | GSE167318 | GEO
| S-EPMC5068512 | biostudies-literature
| S-EPMC4248954 | biostudies-literature
| S-EPMC7906117 | biostudies-literature
| S-EPMC3926434 | biostudies-literature
| S-EPMC3501047 | biostudies-literature
| S-EPMC8279761 | biostudies-literature
| S-EPMC3061879 | biostudies-literature
| S-EPMC8481183 | biostudies-literature