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| Domain hiding | Altered binding specificity | Motif hiding | Composite binding site formation |
| Uncategorised | Rheostatic | Allostery | Avidity-sensing |
| Physicochemical compatibility | Pre-translational | Competition |
| Type: Binary Subtype: Physicochemical compatibility | Type: Binary Subtype: Pre‑translational | Type: Specificity Subtype: Domain hiding |
| Protein | Motif | Start | End | Switch description | Information |
Type: Specificity Subtype: Domain hiding | |||||||
| A domain can be sterically masked by binding of an effector when there is a large difference in intrinsic affinity of the domain for different binding partners, or a large difference in the local abundance of these partners, thereby precluding further interactions of the domain. Binding of the masking molecule can be PTM-dependent or -independent. | |||||||
| APBA1_HUMAN | LIG_PDZ_Class_2 | 832 | 837 | An intramolecular interaction of the C-terminal PDZ binding motif of Amyloid beta A4 precursor protein-binding family A member 1 (APBA1) (also known as X11alpha/Mint1) with the PDZ domain tandem of APBA1 results in an auto-inhibited conformation of APBA1, where binding of ligands containing a PDZ binding motif such as Presenilin-1 (PSEN1) is blocked. Binding of these ligands might be regulated by phosphorylation of Y836 in the APBA1 PDZ-binding motif, as its mutation to glutamate releases autoinhibition and enhances the interaction of the APBA1 PDZ tandem with presenilin. | |||
| PSN1_HUMAN | LIG_PDZ_Class_2 | 462 | 467 | An intramolecular interaction of the C-terminal PDZ binding motif of Amyloid beta A4 precursor protein-binding family A member 1 (APBA1) (also known as X11alpha/Mint1) with the PDZ domain tandem of APBA1 results in an auto-inhibited conformation of APBA1, where binding of ligands containing a PDZ binding motif such as Presenilin-1 (PSEN1) is blocked. Binding of these ligands might be regulated by phosphorylation of Y836 in the APBA1 PDZ-binding motif, as its mutation to glutamate releases autoinhibition and enhances the interaction of the APBA1 PDZ tandem with presenilin. | |||
Type: Binary Subtype: Physicochemical compatibility | |||||||
| PTM of a residue in a motif or in its flanking regions alters the physicochemical and/or structural compatibility of the motif with its binding partner. This can either induce or enhance an interaction, or result in inhibition or even abrogation of an interaction. | |||||||
| SDC1_HUMAN | LIG_PDZ_Class_2 | 305 | 310 | Phosphorylation of Y309 in the PDZ-binding motif of Syndecan-1 (SDC1) prevents binding to the PDZ domain of Syntenin-1 (SDCBP), an interaction involved in the formation of cellular protrusions. | |||
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. | |||||||
| 5HT4R_MOUSE | LIG_PDZ_Class_2 | 368 | 371 | Alternative splicing removes the PDZ-binding motif of Isoform 5-HT4(E) of 5-hydroxytryptamine receptor 4 (Htr4), abrogating binding to InaD-like protein (Inadl). | |||
| GRIA2_RAT | LIG_PDZ_Class_2 | 878 | 883 | Alternative splicing removes the PDZ-binding motif of Glutamate receptor 2 (Gria2), abrogating binding to PRKCA-binding protein (Pick1). The presence of PDZ-binding motifs is also seen in the short isoforms of Gria3 (Isoform Flop of Glutamate receptor 3 (Gria3)) and Gria4 (Isoform 4C flop of Glutamate receptor 4 (Gria4)). PRKCA-binding protein (Pick1) recruits both Protein kinase C alpha type (Prkca) and Gria2 simultaneously, possibly allowing Pick1 to play a role in the selective targeting to and possible anchoring of GluRshort-containing AMPA receptors to intracellular membrane-associated Prkca. | |||