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Updated: Aug 8, 2026

In Vivo Detection and Analysis of Rb Protein SUMOylation in Human Cells
Published on: November 2, 2017
The de-ubiquitinating enzyme Unp interacts with the retinoblastoma protein
1Department of Pathology and Kaplan Comprehensive Cancer Center, MSB 548, New York University Medical Center, 550 First Avenue, New York, NY 10016, USA.
Abstract:
The ubiquitin pathway is involved in the proteolytic turnover of many short-lived cellular regulatory proteins. Since selective degradation of substrates of this system requires the covalent attachment of a polyubiquitin chain to the substrates, degradation could be counteracted by de-ubiquitinating enzymes (or isopeptidases) which selectively remove the polyubiquitin chain. Unp is a human isopeptidase with still poorly understood biological functions. Here, we show that cellular Unp specifically interacts with the retinoblastoma gene product (pRb).
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