title: Differential regulation of c-Jun-dependent transcription by SUMO-specific proteases.
abstract: c-Jun is a transcription factor that plays an important role in regulating cell growth, apoptosis, differentiation, and transformation. The transcriptional activity of c-Jun can be regulated by both phosphorylation and sumoylation. It has also been shown that c-Jun transcription can be regulated by SuPr-1, an alternatively spliced form of SUMO-specific protease 2 (SENP2). However, the ability of SuPr-1 to enhance c-Jun transcription is dependent on promyelocytic leukemia but is independent of the desumoylation activity of SuPr-1. Here, we show that SUMO-specific protease 1 (SENP1) also markedly enhances the transcription activity of c-Jun. The action of SENP1 on c-Jun transcription is independent of the sumoylation and phosphorylation status of c-Jun but is critically dependent on the desumoylation activity of SENP1. We further show that p300 is essential for SENP1 to enhance c-Jun-dependent transcription because SENP1 can desumoylate the CRD1 domain of p300, thereby releasing the cis-repression of CRD1 on p300. Thus, two SUMO-specific proteases regulate c-Jun-dependent transcription through entirely different mechanisms.
authors.affiliation: Department of Cardiology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030, USA.
authors.forename: Jinke
authors.initials: J
authors.lastname: Cheng
authors.forename: Neil D
authors.initials: ND
authors.lastname: Perkins
authors.forename: Edward T H
authors.initials: ET
authors.lastname: Yeh
mesh_terms: D000818:Animals; D015153:Blotting, Western; D019556:COS Cells; D045744:Cell Line, Tumor; D003546:Cysteine Endopeptidases / Q000378:metabolism; D010450:Endopeptidases / Q000378:metabolism; D005786:Gene Expression Regulation; D005982:Glutathione Transferase / Q000378:metabolism; D006655:Histone Deacetylases / Q000378:metabolism; D006801:Humans; D008954:Models, Biological; D008957:Models, Genetic; D009687:Nuclear Proteins / Q000378:metabolism; D010766:Phosphorylation; D010957:Plasmids / Q000378:metabolism; D011485:Protein Binding; D017434:Protein Structure, Tertiary; D016755:Proto-Oncogene Proteins c-jun / Q000378:metabolism*; D034622:RNA Interference; D025841:Small Ubiquitin-Related Modifier Proteins / Q000378:metabolism*; D015534:Trans-Activators / Q000378:metabolism; D014158:Transcription, Genetic; D015533:Transcriptional Activation; D014162:Transfection
chemical_list: D009687:Nuclear Proteins; D016755:Proto-Oncogene Proteins c-jun; D025841:Small Ubiquitin-Related Modifier Proteins; D015534:Trans-Activators; D005982:Glutathione Transferase; D010450:Endopeptidases; C404512:SENP1 protein, human; D003546:Cysteine Endopeptidases; C501833:SENP2 protein, human; C408873:SENP6 protein, human; D006655:Histone Deacetylases