Koonin, E.V., and Abagyan, R.A. (1997). TSG101 may be the prototype of a class of dominant negative ubiquitin regulators. Nature Genetics, 16, 330-331

The TSG101 gene has been implicated in sporadic breast cancer. Knockout of the murine orthologue resulted in fibroblast transformation and ability to form tumours. The TSG101 protein contains a proline rich region and a predicted coiled cil domain, but no functional clues have been extracted from the sequence. We show that the N-terminal domain of TSG101 belongs to a group of apparently inactive homologoues of ubiquitin-conjugating enzymes (E2), which may be dominant negative regulators of E2 activity in cell-cycle control.