Table 1.
Mislocalized Proteins |
Role | Mislocalization | Model(s)/Patient Sample(s) |
---|---|---|---|
1. Lap2 (α, β) | regulation of nuclear architecture | absence in nuclear poles and/or lobules, honeycomb pattern in nuclear blebs | fibroblasts from homozygous p.Y259X patient [46], Lmna LAO mice [109], LmnaΔ8–11 mice MEFs [61] |
2. Emerin | anchorage to the cytoskeleton | cytoplasmic, concentration in one pole, sequestration within nuclear lamin foci, honeycomb pattern | fibroblasts from homozygous p.Y259X patient [46], RNAi LMNA knockdown in HeLa cells [48], various lamin A/C variants expressed in different cell lines [49,50], C. elegans [90], fibroblasts from patients with various lamin A/C mutations [51], myogenic cells derived from myopathies patients’ iPSCs [81], LmnaΔ8–11 mice [50,61], LmnaN195K/N195K mice [86], p.K46del lamin-1 variant C. elegans [87] |
3. Syne1 | anchorage to the cytoskeleton | cytoplasmic | fibroblasts from homozygous p.Y259X patient [46] |
4. B-type lamins | involved in a variety of functions including regulation of expression, mitosis, cellular senescence | absence in one pole (i.e., concentration in one pole only) and/or absence in nuclear lobules, honeycomb pattern | fibroblasts from homozygous p.Y259X patient [46], fibroblasts from patients with various lamin A/C mutations [51], myogenic cells derived from myopathies patients’ iPSCs [81], LamC null and Lamin-C N-terminal deleted D. melanogaster mutants [93], LmnaΔ8–11 mice MEFs [61], cardiac expressing p.M371K lamin A/C mice [119] |
5. Nup153, Nup154 | component of the nuclear pore complex | absence in nuclear poles and/or lobules, clustering | fibroblasts from homozygous p.Y259X patient [46], fibroblasts from p. R225X patient [79], RNAi lmn-1 knockdown in C. elegans [83], LmnaΔ8–11 mice [61], LmnaN195K/N195K mice [86], LamC null and various lamin A/C mutations expressed in D. melanogaster [96], LmnaGT−/− mice [103], LmnaΔ8–11 mice MEFs [61] |
6. SUMO1 | post-translational modifications | sequestration within nuclear lamin foci | various lamin A/C variants expressed in Cos7 cells [38], C2C12 cells [78], LmnaH222P/H222P mice primary myoblasts [78], LmnaH222P/H222P mice skeletal muscle tissue [78] |
7. Actin | cytoskeletal component | filament disorganization, increased nuclear localization, and decreased expression | neonatal rat ventricular myocytes expressing various mutant lamin A/C [34], LamC null D. melanogaster [96], Lamin-C N-terminal deleted and various lamin A/C mutations expressed in D. melanogaster [97], patient myoblasts expressing various L-CMD variants [35,36] |
8. ERK ½ (phosphorylated) | involved in a variety of cellular responses | increased nuclear localization | LmnaH222P/H222P mice, p.H222P lamin A expressing Cos7 and C2C12 cells [21] |
9. Smad2/3 (phosphorylated) | TGF-β signalling pathway | increased nuclear localization | LmnaH222P/H222P mice [118] |
10. Androgen receptors, SRF -FHL2 | mediating actions of androgens | nuclear accumulation | neonatal rat cardiomyocytes expressing p.H222P variant or p.R225X variant [121], LmnaH222P/H222P mice and cardiac tissue from DCM patients [121] |
11. Cx40, Cx43 | gap junction proteins | Diffused pattern and decreased expression in atria | LmnaN195K/N195K mice [86] |