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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ITB7_HUMAN | LIG_Filamin | 776 | 787 | The integrin regulator Talin-1 (TLN1) and the actin-crosslinking Filamins Filamin-A (FLNA) use overlapping binding sites on the cytoplasmic tails of beta integrin subunits Integrin beta-7 (ITGB7), which makes their interaction with beta integrin mutually exclusive. | 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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ITB1_HUMAN | LIG_Filamin_2 | 783 | 791 | Alternative splicing strongly inhibits the binding of the filamin-binding motif of Integrin beta-1 (ITGB1) to Filamin-A (FLNA), primarily due to the alteration of A to P it seems. | details |
ITB1_HUMAN | LIG_Filamin_2 | 783 | 791 | Alternative splicing strongly inhibits the binding of the filamin-binding motif of Integrin beta-1 (ITGB1) to Filamin-B (FLNB), primarily due to the alteration of A to P it seems. Splicing of FLNB also affects this interaction. | 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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ITB2_HUMAN | LIG_Filamin | 753 | 763 | Phosphorylation of T758 in Integrin beta-2 (ITGB2) switches the specificity of ITGB2 from Filamin-A (FLNA) to 14-3-3 proteins (e.g. 14-3-3 protein zeta/delta (YWHAZ)). | details |