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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 |
| Protein | Motif | Start | End | Switch description | Information |
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. | |||||||
| 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). | |||
| VPAP_HCMVA | TRG_NLS_MonoExtN_4 | 425 | 432 | Inhibition of nuclear import of DNA polymerase processivity factor (UL44) by phosphorylation-dependent (T427) binding of BRCA1-associated protein (BRAP). | |||
| CDN1B_HUMAN | TRG_NLS | 152 | 166 | Phosphorylation of a 14-3-3-binding motif in the NLS of Cyclin-dependent kinase inhibitor 1B (CDKN1B) by RAC-alpha serine/threonine-protein kinase (AKT1) induces binding of 14-3-3 protein gamma (YWHAG), which hides the NLS and prevents binding to Importin subunit alpha-1 (KPNA1), thereby mediating cytoplasmic retention of Cyclin-dependent kinase inhibitor 1B (CDKN1B). Binding of 14-3-3 dimer involves an additional C-terminal 14-3-3-binding motif (see switch 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. | |||||||
| UNG_HUMAN | TRG_NLS_MonoExtN_4 | 15 | 21 | Alternative splicing removes the nuclear localisation signal (NLS) of Uracil-DNA glycosylase (UNG), abrogating binding to Importin subunit alpha-1 (KPNA1) and import into the nucleus. In Isoform UNG1 of Uracil-DNA glycosylase (UNG) the NLS present in Isoform UNG2 of Uracil-DNA glycosylase (UNG) is replaced with a mitochondrial localisation signal (MLS), promoting different localisations of the different protein isoforms. | |||
| KCC2D_RAT | TRG_NLS_MonoCore_2 | 327 | 332 | Alternative splicing removes the nuclear localisation signal (NLS) of Isoform Delta 3 of Calcium/calmodulin-dependent protein kinase type II subunit delta (Camk2d), abrogating binding to Importin subunit alpha-1 (KPNA1) and nuclear import. This is due to an 11 amino acid insert encoded by exon 14. | |||
| FBXW7_HUMAN | TRG_NLS_MonoCore_2 | 10 | 15 | Alternative splicing removes the nuclear localisation signal (NLS) of F-box/WD repeat-containing protein 7 (FBXW7), abrogating binding to Importin subunit alpha-1 (KPNA1). There are two other NLS motifs in the protein, meaning the isoform can still enter the nucleus. | |||
| OGG1_HUMAN | TRG_NLS_MonoExtN_4 | 332 | 339 | Alternative splicing removes the nuclear localisation signal (NLS) motif of N-glycosylase/DNA lyase (OGG1), abrogating binding to Importin subunit alpha-1 (KPNA1) and import into the nucleus. OGG1-1a (also known as Isoform Alpha of N-glycosylase/DNA lyase (OGG1)) has a C-terminal NLS motif that is absent in OGG1-2a (also known as Isoform Beta of N-glycosylase/DNA lyase (OGG1)) . Both have a weak mitochondrial localisation signal (MLS) in the N-terminal. | |||
| PML_HUMAN | TRG_NLS | 476 | 490 | Alternative splicing removes the nuclear localisation signal (NLS) of Protein PML (PML), abrogating binding to Importin subunit alpha-1 (KPNA1) and import into the nucleus. | |||
| BRCA1_HUMAN | TRG_NLS_MonoExtN_4 | 501 | 508 | Alternative splicing removes the nuclear localisation signal (NLS) of Breast cancer type 1 susceptibility protein (BRCA1), abrogating binding to Importin subunit alpha-1 (KPNA1) and import into the nucleus. The study compared the full-length Brca1 splice variant (Isoform 1 of Breast cancer type 1 susceptibility protein (BRCA1)) to the Delta11b isoform (Isoform Delta11b of Breast cancer type 1 susceptibility protein (BRCA1)). The shorter isoform is missing exon 11b and differs in a number of ways. Firstly, it lacks an NLS and therefore has a cytoplasmic localisation. Also, when over-expressed, the Delta11b isoform was not toxic, suggesting nuclear localisation is important for Brca1's toxic behaviour. | |||
| MDM2_HUMAN | TRG_NLS_MonoExtC_3 | 181 | 187 | Alternative splicing removes the nuclear localisation signal (NLS) of E3 ubiquitin-protein ligase Mdm2 (MDM2), abrogating binding to Importin subunit alpha-1 (KPNA1). The exclusion from the nucleus is not complete however, as another NLS (466-473) is speculated to target splice variants to the nucleus, however, to the annotator it seems more likely that splice variants can dimerise with full-length MDM2 and be simultaneously transported into nucleus. | |||