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| Motif | Protein | Start | End | Switch Type | Switch Subtype | Switch description | Information | Evidence |
CDC2/CDKX subfamily | ||||||||
| LIG_WW_1 | SMAD3_HUMAN | 181 | 184 | Specificity | Altered binding specificity | CDK8/9 phosphorylates Mothers against decapentaplegic homolog 3 (SMAD3) at T179 and S208. Phosphorylation of T179 creates a binding site for the WW domain of Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 (PIN1), while phosphorylation of S208 primes SMAD3 for phosphorylation of S204 by Glycogen synthase kinase-3 beta (GSK3B). The pS204-pS208 forms a binding site for the third WW domain of E3 ubiquitin-protein ligase NEDD4-like (NEDD4L), whose second WW domain will displace the WW domain of PIN1 at the pT179-PY box site of SMAD3. This regulation couples SMAD3 activation to SMAD3 destruction in an ordered fashion. See also switch details and switch details. | Curated | |
| LIG_WW_1 | SMAD3_HUMAN | 181 | 184 | Avidity‑sensing | CDK8/9 phosphorylates Mothers against decapentaplegic homolog 3 (SMAD3) at T179 and S208. Phosphorylation of T179 creates a binding site for the WW domain of Peptidyl-prolyl cis-trans isomerase NIMA-interacting 1 (PIN1), while phosphorylation of S208 primes SMAD3 for phosphorylation of S204 by Glycogen synthase kinase-3 beta (GSK3B). The pS204-pS208 forms a binding site for the third WW domain of the E3 ubiquitin-protein ligase NEDD4-like (NEDD4L), whose second WW domain will displace the WW domain of PIN1 at the pT179-PY box site of SMAD3. This regulation couples SMAD3 activation to SMAD3 destruction in an ordered fashion. Dual phosphorylation of the two NEDD4L-binding sites mediates high-avidity binding of two WW domains of NEDD4L to SMAD3. See also switch details and switch details. | Curated | ||
Tyrosine-protein kinase ABL1 - ABL1 - Mus musculus | ||||||||
| LIG_WW_1 | JUN_MOUSE | 167 | 170 | Binary | Physicochemical compatibility | Phosphorylation of Y170 in the WW-binding motif of Transcription factor AP-1 (Jun) by Tyrosine-protein kinase ABL1 (Abl1) blocks binding to the E3 ubiquitin-protein ligase Itchy (Itch). As a result, Transcription factor AP-1 (Jun) is not ubiquitylated by E3 ubiquitin-protein ligase Itchy (Itch), and thus not targeted for proteasomal degradation. Regulation of transcriptional activity of Transcription factor AP-1 (Jun) by Tyrosine-protein kinase ABL1 (Abl1) required translocation of the kinase to the nucleus, which was triggered by T cell activation. | Curated | |