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.
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LT_SV40 | TRG_NLS_MonoExtN_4 | 126 | 132 | An intramolecular interaction between the importin beta-binding (IBB) domain and the NLS-binding pocket of Importin subunit alpha (SRP1) prevents binding of NLS cargo (e.g. Large T antigen) in the absence of Importin subunit beta-1 (KAP95) by hiding of the NLS-binding pocket. Binding of the IBB of Importin subunit alpha (SRP1) to Importin subunit beta-1 (KAP95) relieves this auto-inhibitory interaction and increases the affinity of Importin subunit alpha (SRP1) for NLS cargo. | details |
Type: Specificity Subtype: Motif hiding |
Motif hiding occurs when there is a large difference in intrinsic affinity of overlapping or adjacent motifs for their respective binding partners, or a large difference in the local abundance of these partners. Binding of an effector to one motif sterically masks the overlapping or adjacent motif, thereby precluding it from binding. Binding of the masking molecule can be PTM-dependent or -independent.
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LT_SV40 | TRG_NLS_MonoExtN_4 | 126 | 132 | Inhibition of nuclear import of Large T antigen by phosphorylation-dependent (T124) binding of BRCA1-associated protein (BRAP). | details |
LT_SV40 | TRG_NLS_MonoExtN_4 | 126 | 132 | Inhibition of nuclear import of Large T antigen by phosphorylation-dependent (T124) binding of BRCA1-associated protein (BRAP). | details |
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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LT_SV40 | DEG_SCF_FBW7_2 | 699 | 705 | Phosphorylation of T701 in the degron of Large T antigen induces binding to the F-box/WD repeat-containing protein 7 (FBXW7) protein, which recruits it to the SCF ubiquitin ligase complex where it is marked for degradation. | details |