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Group by :Switch typeMotif classProteinEnzymePathway            Group Index    Colouring Info              Filtered: UNIPROT:O70161 (6 hits) x
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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

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Type: Binary Subtype: Physicochemical compatibilityType: Binary Subtype: Pre‑translational


ProteinMotifStartEndSwitch descriptionInformation

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.
PI51C_MOUSELIG_PTB_Talin645648Phosphorylation of S645 in the PTB-binding motif of Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c) by Cyclin-dependent kinase 5 (Cdk5) inhibits its interaction with Talin-1 (Tln1).
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PI51C_MOUSELIG_PTB_Talin645648Phosphorylation of Y644 in Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c) promotes its association with Talin-1 (Tln1).
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PI51C_MOUSETRG_AP2beta_CARGO_2633644Phosphorylation of S645 in Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c) impedes binding to AP-2 complex subunit beta (Ap2b1), while dephosphorylation by calcineurin promotes binding. These phosphorylation and dephosphorylation events are important for the regulation of clathrin coat formation associated with synaptic vesicles.
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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.
PI51C_MOUSETRG_ENDOCYTIC_2644647Alternative splicing removes the endocytosis motif of Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c), abrogating binding to AP-2 complex subunit mu (Ap2m1). The direct interaction between the AP-2 complex and Isoform PIPKIgamma661 of Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c) (PIPKIgamma661) targets this isoform to sites of endocytosis at the plasma membrane. Consequently, this results in the generation of a highly concentrated pool of PI(4,5)P2 at these sites.
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PI51C_MOUSELIG_PTB_Talin645648Alternative splicing removes the PTB domain-binding motif of Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c), abrogating binding to Talin-1 (Tln1). Integrin receptors, Tln1 and Isoform PIPKIgamma661 of Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c) (PIPKIgamma661) are recruited to focal adhesions, inducing synthesis of PI(4,5)P2. The regulated and localised generation of PI(4,5)P2 facilitates the assembly and/or disassembly of focal adhesions.
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PI51C_MOUSETRG_AP2beta_CARGO_2633644Alternative splicing removes the AP-2 beta-appendage-binding motif of Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c), abrogating binding to AP-2 complex subunit beta (Ap2b1). With other enzymes (members of the eukaryotic diacylglycerol kinase family, and Synaptojanin-1 (Synj1)), Isoform PIPKIgamma661 of Phosphatidylinositol 4-phosphate 5-kinase type-1 gamma (Pip5k1c) (PIPKIgamma661) optimises the regional lipid environment necessary for clathrin coat formation. There are three different C-terminal splice variants of Pip5k1c: one (PIPKIgamma687) can bind selectively to Talin-1 (Tln1) via the C-terminal extension (switch details), one (PIPKIgamma661) can bind to both Talin-1 (Tln1) and AP-2 complex subunit beta (Ap2b1), and one (PIPKIgamma635) can bind to neither protein. This flexibility could impart importantly different biological functions to each isoform. For example, in humans PIP5K1C (PIPKIgamma661 in mouse) is proposed to act upstream of Rac/Rho and the differential regulation of PIP5K-gamma and -alpha might allow them to work in tandem to modulate the actin cytoskeleton during the attachment and ingestion phases of phagocytosis (See (here)).
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