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Letter

Nature Cell Biology 9, 80–85 (1 January 2007) | doi:10.1038/ncb1522

Regulation of protein tyrosine phosphatase 1B by sumoylation

Shrikrishna Dadke , Sophie Cotteret , Shu-Chin Yip , Zahara M. Jaffer , Fawaz Haj , Alexey Ivanov , Frank Rauscher , Ke Shuai , Tony Ng , Benjamin G. Neel & Jonathan Chernoff

Protein-tyrosine phosphatase 1B (PTP1B) is an ubiquitously expressed enzyme that negatively regulates growth-factor signalling and cell proliferation by binding to and dephosphorylating key receptor tyrosine kinases, such as the insulin receptor. It is unclear how the activity of PTP1B is regulated.