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.
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Y1827_MYCTU | LIG_FHA_1 | 19 | 25 | Phosphorylation of T21 in the FHA-binding motif of Uncharacterized protein Rv1827/MT1875 (Rv1827) by Probable serine/threonine-protein kinase pknG (pknG) results in auto-inhibition due to an intramolecular interaction with the FHA domain. As a result, phosphorylation-independent interactions of the FHA domain with metabolic enzymes, which regulate the catalytic activity of these enzymes, are blocked (See also switch details). | details |
CHK2_HUMAN | LIG_FHA_1 | 66 | 72 | Phosphorylation of T68 in the FHA-binding motif of Serine/threonine-protein kinase Chk2 (CHEK2) induces binding to the Serine/threonine-protein kinase Chk2 (CHEK2) protein. | details |
RAD9_YEAST | LIG_FHA_1 | 601 | 607 | Phosphorylation of T603 in the FHA-binding motif of DNA repair protein RAD9 (RAD9) induces binding to the Serine/threonine-protein kinase RAD53 (RAD53) protein. | details |
PIN4_YEAST | LIG_FHA_1 | 303 | 309 | Phosphorylation of T305 in the FHA-binding motif of RNA-binding protein PIN4 (PIN4) induces binding to the Serine/threonine-protein kinase RAD53 (RAD53) protein. | details |
CLV1_ARATH | LIG_FHA_1 | 866 | 872 | Phosphorylation of T868 in the FHA-binding motif of Receptor protein kinase CLAVATA1 (CLV1) induces binding to the Protein phosphatase 2C 70 (KAPP) protein. | details |
RAD9_YEAST | LIG_FHA_2 | 153 | 159 | Phosphorylation of T155 in the FHA-binding motif of DNA repair protein RAD9 (RAD9) induces binding to the Serine/threonine-protein kinase RAD53 (RAD53) protein. | details |
RAD9_YEAST | LIG_FHA_2 | 190 | 196 | Phosphorylation of T192 in the FHA-binding motif of DNA repair protein RAD9 (RAD9) induces binding to the Serine/threonine-protein kinase RAD53 (RAD53) protein. | details |
XRCC1_HUMAN | LIG_FHA_2 | 521 | 527 | Phosphorylation of T523 in the FHA-binding motif of DNA repair protein XRCC1 (XRCC1) by Casein kinase II subunit alpha (CSNK2A1) induces binding to the Aprataxin (APTX) protein. | details |
MRC1_SCHPO | LIG_FHA_2 | 643 | 649 | Phosphorylation of T645 in the FHA-binding motif of Mediator of replication checkpoint protein 1 (mrc1) induces binding to the Serine/threonine-protein kinase cds1 (cds1) protein. | details |
Y1827_MYCTU | LIG_FHA_1 | 20 | 26 | Phosphorylation of T22 in the FHA-binding motif of Uncharacterized protein Rv1827/MT1875 (Rv1827) by Serine/threonine-protein kinase pknB (pknB) results in auto-inhibition due to an intramolecular interaction with the FHA domain. As a result, phosphorylation-independent interactions of the FHA domain with metabolic enzymes, which regulate the catalytic activity of these enzymes, are blocked (See also switch details). | details |
Type: Cumulative Subtype: Rheostatic |
Rheostatic switches gradually alter the affinity of a motif for a single binding partner by addition of multiple PTMs that additively contribute to this modulation. Additional modifications can either strengthen or weaken an interaction.
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MK67I_HUMAN | LIG_FHA_2 | 238 | 244 | Phosphorylation of T238 in MKI67 FHA domain-interacting nucleolar phosphoprotein (MKI67IP) by Cyclin-dependent kinase 1 (CDK1) primes for phosphorylation of T234 by Glycogen synthase kinase-3 beta (GSK3B), which primes for phosphorylation of S230 by Glycogen synthase kinase-3 beta (GSK3B). Triple-phosphorylated hNIFK (MKI67 FHA domain-interacting nucleolar phosphoprotein (MKI67IP)) binds strongly to Antigen KI-67 (MKI67). See also switch details | 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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MK67I_HUMAN | LIG_FHA_2 | 238 | 244 | Phosphorylation of T238 of MKI67 FHA domain-interacting nucleolar phosphoprotein (MKI67IP) by Cyclin-dependent kinase 1 (CDK1) primes for phosphorylation of T234 by Glycogen synthase kinase-3 beta (GSK3B), which primes for phosphorylation of S230 by GSK3B. Triple-phosphorylated hNIFK (MKI67IP) binds strongly to Antigen KI-67 (MKI67). | details |