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.
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DAG1_HUMAN | LIG_WW_1 | 889 | 892 | The WW-binding motif for Dystrophin (DMD) and the SH3-binding motif for Growth factor receptor-bound protein 2 (GRB2) on Dystroglycan (DAG1) overlap, making their interactions mutually exclusive and competitive. | details |
DAG1_HUMAN | LIG_SH3_3 | 888 | 894 | The WW-binding motif for Dystrophin (DMD) and the SH3-binding motif for Growth factor receptor-bound protein 2 (GRB2) on Dystroglycan (DAG1) overlap, making their interactions mutually exclusive and competitive. | details |
DAG1_HUMAN | LIG_WW_1 | 889 | 892 | The WW-binding motif for Dystrophin (DMD) and the SH3-binding motif for Growth factor receptor-bound protein 2 (GRB2) on Dystroglycan (DAG1) overlap, making their interactions mutually exclusive and competitive. | details |
DAG1_HUMAN | LIG_SH3_3 | 888 | 894 | The WW-binding motif for Dystrophin (DMD) and the SH3-binding motif for Growth factor receptor-bound protein 2 (GRB2) on Dystroglycan (DAG1) overlap, making their interactions mutually exclusive and competitive. | 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.
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DMD_HUMAN | LIG_Actin_DMD | 5 | 10 | Alternative splicing removes the actin-binding motif of Isoform Dp71 of Dystrophin (DMD), abrogating binding to Actin, alpha skeletal muscle (ACTA1). The presence of the actin-binding motif in Isoform Dp71 of Dystrophin (DMD) may allow it to participate in the clustering of sodium channels by anchoring the syntrophin/channel complex to the actin cytoskeleton. | 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.
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DAG1_HUMAN | LIG_WW_1 | 889 | 892 | Adhesion-dependent phosphorylation of Y892 in Dystroglycan (DAG1) by Src kinase (Proto-oncogene tyrosine-protein kinase Src (SRC)) switches the specificity of DAG1 from the WW domain containing cytoskeletal linker Dystrophin (DMD) to the SH2 domain containing Tyrosine-protein kinase Fyn (FYN). | details |