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SUMO-1 protease-1 regulates gene transcription through PML.

Authors:
Best JL, Ganiatsas S, Agarwal S, Changou A, Salomoni P, Shirihai O, Meluh PB, Pandolfi PP, Zon LI
Affiliation:
Journal:
Molecular cell

Abstract

During a screen to identify c-Jun activators, we isolated a cysteine protease, SuPr-1, that induced c-Jun-dependent transcription independently of c-Jun phosphorylation. SuPr-1 is a member of a new family of proteases that hydrolyze the ubiquitin-like modifier, SUMO-1. SuPr-1 hydrolyzed SUMO-1-modified forms of the promyelocytic leukemia gene product, PML, and altered the subcellular distribution of PML in nuclear PODs (PML oncogenic domains). SuPr-1 also altered the distribution of other nuclear POD-associated proteins, such as CBP and Daxx, that act as transcriptional regulators. SuPr-1 action on transcription was enhanced by PML, and SuPr-1 failed to activate transcription in PML-deficient fibroblasts. Our studies establish an important role for SUMO proteases in transcription.

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