JUN phospho S73

Function

Transcription factor that recognizes and binds to the enhancer heptamer motif 5'-TGA[CG]TCA-3' (PubMed:10995748, PubMed:22083952). Promotes activity of NR5A1 when phosphorylated by HIPK3 leading to increased steroidogenic gene expression upon cAMP signaling pathway stimulation (PubMed:17210646). Involved in activated KRAS-mediated transcriptional activation of USP28 in colorectal cancer (CRC) cells (PubMed:24623306). Binds to the USP28 promoter in colorectal cancer (CRC) cells (PubMed:24623306).

Post-translational modifications

Ubiquitinated by the SCF(FBXW7), leading to its degradation (PubMed:14739463, PubMed:27458189). Ubiquitination takes place following phosphorylation, that promotes interaction with FBXW7 (PubMed:14739463).

Phosphorylated by CaMK4 and PRKDC; phosphorylation enhances the transcriptional activity. Phosphorylated by HIPK3. Phosphorylated by DYRK2 at Ser-243; this primes the protein for subsequent phosphorylation by GSK3B at Thr-239. Phosphorylated at Thr-239, Ser-243 and Ser-249 by GSK3B; phosphorylation reduces its ability to bind DNA. Phosphorylated by PAK2 at Thr-2, Thr-8, Thr-89, Thr-93 and Thr-286 thereby promoting JUN-mediated cell proliferation and transformation. Phosphorylated by PLK3 following hypoxia or UV irradiation, leading to increase DNA-binding activity.

Acetylated at Lys-271 by EP300.

Sequence similarities

Belongs to the bZIP family. Jun subfamily.

Tissue specificity

Expressed in the developing and adult prostate and prostate cancer cells.

Cellular localization

• Nucleus

Alternative names

• Transcription factor AP-1
• Activator protein 1
• Proto-oncogene c-Jun
• V-jun avian sarcoma virus 17 oncogene homolog
• p39
• AP1
• JUN

Database links

• swissprot:P05412

Target type

Proteins

Primary research area

Oncology

Other research areas

• Epigenetics
• Immuno-oncology

Molecular weight

35676Da