p(HGNC:MAPT, pmod(Ac, Lys, 280))

Entity

Name

MAPT

Namespace

hgnc

Namespace Version

20180906

Namespace URL

https://raw.githubusercontent.com/pharmacome/terminology/b46b65c3da259b6e86026514dfececab7c22a11b/external/hgnc-names.belns

Notably, tau has intrinsic acetyltransferase activity and so can catalyse auto-acetylation at certain Lys sites, including Lys280 PubMed:26631930

We have used a knock-out/knock-in strategy in Drosophila to generate a strain with hTau inserted into the endogenous fly tau locus and expressed under the control of the endogenous fly tau promoter, thus avoiding potential toxicity due to genetic over-expression. hTau knock-in (KI) proteins were expressed at normal, endogenous levels, bound to fly microtubules and were post-translationally modified, hence displaying physiological properties. We used this new model to investigate the effects of acetylation on hTau toxicity in vivo. The simultaneous pseudo-acetylation of hTau at lysines 163, 280, 281 and 369 drastically decreased hTau phosphorylation and significantly reduced its binding to microtubules in vivo. These molecular alterations were associated with ameliorated amyloid beta toxicity. Our results indicate acetylation of hTau on multiple sites regulates its biology and ameliorates amyloid beta toxicity in vivo. PubMed:28855586

Incubation with p300, not pCAF, led to tau acetylation, while both p300 and pCAF were active in transferring acetyl groups to histones as expected (Figure 1A). A few putative acetylated lysines were in the N- and C- terminal regions; 13 were in microtubule-binding domains (Figure 1B and Table-S1). Putative acetylated N-terminal lysines (e.g., lysines 163, 174, and 180) appeared to be acetylated in all MS analyses. Those in the microtubule-binding domains appeared to be acetylated in a subset of MS analyses, suggesting variable acetylation at these sites in vitro. PubMed:20869593

Thus, K280 acetylation is a feature found in a variety of human 4R or 3R/4R tauopathies including AD, but not 3R-tauopathies such as PiD. PubMed:21427723

We also tested for ac-tau 280 in early stage Alzheimer's disease (Braak stage 1). Histopathological examination using the ac tau 280 antibody was performed in three Alzheimer's cases and three CTE patients. Presence of ac-tau 280 was confirmed in all cases at early sites of disease manifestation. These findings suggest that tau acetylation may precede tau phosphorylation and could be the first PubMed:29276758

Thus, K280 acetylation is a feature found in a variety of human 4R or 3R/4R tauopathies including AD, but not 3R-tauopathies such as PiD. PubMed:21427723

We also tested for ac-tau 280 in early stage Alzheimer's disease (Braak stage 1). Histopathological examination using the ac tau 280 antibody was performed in three Alzheimer's cases and three CTE patients. Presence of ac-tau 280 was confirmed in all cases at early sites of disease manifestation. These findings suggest that tau acetylation may precede tau phosphorylation and could be the first PubMed:29276758

Depending on the sites, the acetylation of tau could inhibit its degradation (for example, when at Lys163, Lys280, Lys281 or Lys369) or, by contrast, facilitate its degradation and suppress its phosphorylation and aggregation (for example, when at Lys259, Lys290, Lys321 or Lys353) PubMed:26631930

By contrast, acetylation of tau at Lys280 has been detected in AD and other tauopathies, including AGD, tangle-predominant senile dementia (TPSD), PiD, FTDP‑17 and PSP, and is pathological PubMed:26631930

By contrast, acetylation of tau at Lys280 has been detected in AD and other tauopathies, including AGD, tangle-predominant senile dementia (TPSD), PiD, FTDP‑17 and PSP, and is pathological PubMed:26631930

By contrast, acetylation of tau at Lys280 has been detected in AD and other tauopathies, including AGD, tangle-predominant senile dementia (TPSD), PiD, FTDP‑17 and PSP, and is pathological PubMed:26631930

By contrast, acetylation of tau at Lys280 has been detected in AD and other tauopathies, including AGD, tangle-predominant senile dementia (TPSD), PiD, FTDP‑17 and PSP, and is pathological PubMed:26631930

We also tested for ac-tau 280 in early stage Alzheimer's disease (Braak stage 1). Histopathological examination using the ac tau 280 antibody was performed in three Alzheimer's cases and three CTE patients. Presence of ac-tau 280 was confirmed in all cases at early sites of disease manifestation. These findings suggest that tau acetylation may precede tau phosphorylation and could be the first PubMed:29276758

Thus, K280 acetylation is a feature found in a variety of human 4R or 3R/4R tauopathies including AD, but not 3R-tauopathies such as PiD. PubMed:21427723

We also tested for ac-tau 280 in early stage Alzheimer's disease (Braak stage 1). Histopathological examination using the ac tau 280 antibody was performed in three Alzheimer's cases and three CTE patients. Presence of ac-tau 280 was confirmed in all cases at early sites of disease manifestation. These findings suggest that tau acetylation may precede tau phosphorylation and could be the first PubMed:29276758

We also tested for ac-tau 280 in early stage Alzheimer's disease (Braak stage 1). Histopathological examination using the ac tau 280 antibody was performed in three Alzheimer's cases and three CTE patients. Presence of ac-tau 280 was confirmed in all cases at early sites of disease manifestation. These findings suggest that tau acetylation may precede tau phosphorylation and could be the first PubMed:29276758

We have used a knock-out/knock-in strategy in Drosophila to generate a strain with hTau inserted into the endogenous fly tau locus and expressed under the control of the endogenous fly tau promoter, thus avoiding potential toxicity due to genetic over-expression. hTau knock-in (KI) proteins were expressed at normal, endogenous levels, bound to fly microtubules and were post-translationally modified, hence displaying physiological properties. We used this new model to investigate the effects of acetylation on hTau toxicity in vivo. The simultaneous pseudo-acetylation of hTau at lysines 163, 280, 281 and 369 drastically decreased hTau phosphorylation and significantly reduced its binding to microtubules in vivo. These molecular alterations were associated with ameliorated amyloid beta toxicity. Our results indicate acetylation of hTau on multiple sites regulates its biology and ameliorates amyloid beta toxicity in vivo. PubMed:28855586

Surprisingly, we show that tau acetylation alters phosphorylation at residues S202/T205 (comprising the AT8 epitope), indicating acetylation-dephosphorylation cross-talk. Using a series of biochemical approaches, we found that K280/K281 acetylation impaired tau-mediated MT assembly function and also significantly enhanced tau aggregation. We also demonstrate that methylene blue, a reported tau aggregation inhibitor, modulates tau acetylation, a novel mechanism of action for this class of compounds PubMed:28287136

Surprisingly, we show that tau acetylation alters phosphorylation at residues S202/T205 (comprising the AT8 epitope), indicating acetylation-dephosphorylation cross-talk. Using a series of biochemical approaches, we found that K280/K281 acetylation impaired tau-mediated MT assembly function and also significantly enhanced tau aggregation. We also demonstrate that methylene blue, a reported tau aggregation inhibitor, modulates tau acetylation, a novel mechanism of action for this class of compounds PubMed:28287136

hTau-K280Q mutants showed significantly increased phosphorylation on S262 as compared to both hTau-wt and hTau-K280R flies, when normalised to total hTau (K9JA) levels (**p < 0.01, one-way ANOVA, Fig. 4b,c). Mis-expression of pseudo-acetylated K280Q-hTau in the adult fly nervous system potently exacerbated fly locomotion defects and photoreceptor neurodegeneration. PubMed:26940749

hTau-K280Q mutants showed significantly increased phosphorylation on S262 as compared to both hTau-wt and hTau-K280R flies, when normalised to total hTau (K9JA) levels (**p < 0.01, one-way ANOVA, Fig. 4b,c). Mis-expression of pseudo-acetylated K280Q-hTau in the adult fly nervous system potently exacerbated fly locomotion defects and photoreceptor neurodegeneration. PubMed:26940749

Thus, K280 acetylation is a feature found in a variety of human 4R or 3R/4R tauopathies including AD, but not 3R-tauopathies such as PiD. PubMed:21427723

Depending on the sites, the acetylation of tau could inhibit its degradation (for example, when at Lys163, Lys280, Lys281 or Lys369) or, by contrast, facilitate its degradation and suppress its phosphorylation and aggregation (for example, when at Lys259, Lys290, Lys321 or Lys353) PubMed:26631930

By contrast, acetylation of tau at Lys280 has been detected in AD and other tauopathies, including AGD, tangle-predominant senile dementia (TPSD), PiD, FTDP‑17 and PSP, and is pathological PubMed:26631930

By contrast, acetylation of tau at Lys280 has been detected in AD and other tauopathies, including AGD, tangle-predominant senile dementia (TPSD), PiD, FTDP‑17 and PSP, and is pathological PubMed:26631930

By contrast, acetylation of tau at Lys280 has been detected in AD and other tauopathies, including AGD, tangle-predominant senile dementia (TPSD), PiD, FTDP‑17 and PSP, and is pathological PubMed:26631930

By contrast, acetylation of tau at Lys280 has been detected in AD and other tauopathies, including AGD, tangle-predominant senile dementia (TPSD), PiD, FTDP‑17 and PSP, and is pathological PubMed:26631930