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The de-ubiquitinating enzyme Unp interacts with the retinoblastoma protein.

Authors:
DeSalle LM, Latres E, Lin D, Graner E, Montagnoli A, Baker RT, Pagano M, Loda M
Affiliation:
Journal:
Oncogene

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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