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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RB_HUMAN | DOC_CYCLIN_1 | 873 | 877 | The docking sites for PP1 (e.g. Serine/threonine-protein phosphatase PP1-alpha catalytic subunit (PPP1CA)) and Cdk-Cyclins (e.g. Cyclin-A2 (CCNA2)) on Retinoblastoma-associated protein (RB1) overlap, which makes their binding to RB1 mutually exclusive. Hypophosphorylated RB1 blocks E2F-dependent transcription, while hyperphosphorylation inactivates RB1 as a repressor, thereby promoting cell cycle progression. | details |
RB_HUMAN | DOC_PP1 | 872 | 878 | The docking sites for PP1 (e.g. Serine/threonine-protein phosphatase PP1-alpha catalytic subunit (PPP1CA)) and Cdk-Cyclins (e.g. Cyclin-A2 (CCNA2)) on Retinoblastoma-associated protein (RB1) overlap, which makes their binding to RB1 mutually exclusive. Hypophosphorylated RB1 blocks E2F-dependent transcription, while hyperphosphorylation inactivates RB1 as a repressor, thereby promoting cell cycle progression. | 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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NEK2_HUMAN | DOC_PP1 | 380 | 387 | Alternative splicing removes the PP1-docking motif of Serine/threonine-protein kinase Nek2 (NEK2), abrogating binding to Serine/threonine-protein phosphatase PP1-alpha catalytic subunit (PPP1CA). Isoform Nek2A of Serine/threonine-protein kinase Nek2 (NEK2) is localised at centrosomes and causes centrosome splitting. Isoform Nek2B of Serine/threonine-protein kinase Nek2 (NEK2) is expressed at a different point in the cell cycle and required for assembly/maintenance of centrosomes. | details |