Type: Specificity Subtype: Competition |
Competitive binding of multiple binding partners to overlapping or adjacent, mutually exclusive interaction interfaces depends on local target protein abundance, which can be regulated by changing the expression level or subcellular localisation of the competitors, or by scaffolding.
|
P73_HUMAN | LIG_WW_1 | 484 | 487 | The transcriptional coactivator YAP1 and the ubiquitin ligase Itch competitively bind to the same WW-binding motif of p73. Binding of YAP1 prevents Itch-mediated ubiquitylation of p73, resulting in stabilisation, and increases trancriptional activity of p73. | details |
P73_HUMAN | LIG_WW_1 | 484 | 487 | The transcriptional coactivator YAP1 and the ubiquitin ligase Itch competitively bind to the same WW-binding motif of p73. Binding of YAP1 prevents Itch-mediated ubiquitylation of p73, resulting in stabilisation, and increases trancriptional activity of p73. | details |
Type: Binary Subtype: Pre‑translational |
Pre-translational mechanisms such as alternative splicing, alternative promoter-usage and/or RNA editing result in inclusion or removal of exons that contain an entire or partial motif.
|
ERBB4_HUMAN | LIG_WW_1 | 1053 | 1056 | Alternative splicing removes the WW-binding motif of Receptor tyrosine-protein kinase erbB-4 (ERBB4), abrogating binding to E3 ubiquitin-protein ligase Itchy homolog (ITCH). The presence of a WW-binding motif mediates ERBB4 mono-ubiquitination and endocytosis by the WW domain-containing HECT-type E3 ubiquitin ligase ITCH. | details |
ERBB4_HUMAN | LIG_WW_1 | 1053 | 1056 | Alternative splicing removes the WW-binding motif of Receptor tyrosine-protein kinase erbB-4 (ERBB4), abrogating binding to E3 ubiquitin-protein ligase Itchy homolog (ITCH). The presence of a WW-binding motif mediates ERBB4 mono-ubiquitination and endocytosis by the WW domain-containing HECT-type E3 ubiquitin ligase ITCH. | details |
Type: Specificity Subtype: Altered binding specificity |
The balance of the competition for overlapping or adjacent, mutually exclusive interaction interfaces is tipped in favor of one of the interactors by PTM-dependent modulation of the intrinsic affinity of a binding region. Multiple, successive PTMs allow sequential switching of different binding partners in an ordered manner by step-wise alteration of binding specificity.
|
ERBB4_HUMAN | LIG_WW_1 | 1053 | 1056 | Phosphorylation-dependent binding of Receptor tyrosine-protein kinase erbB-4 (ERBB4) to the SH2 domains of Phosphatidylinositol 3-kinase regulatory subunit alpha (PIK3R1) results in signaling activation, while binding to the WW domains of E3 ubiquitin-protein ligase Itchy homolog (ITCH) to unphopshorylated ERBB4 results in ubiquitylation, endocytosis and ultimately degradation of ERBB4. | details |