Differential effects of apolipoprotein E isoforms on phosphorylation at specific sites on tau by glycogen synthase kinase-3 beta identified by nano-electrospray mass spectrometry.
FEBS Lett
; 485(2-3): 99-103, 2000 Nov 24.
Article
in En
| MEDLINE
| ID: mdl-11094148
Previously published data have shown an allele-specific variation in the in vitro binding of apolipoprotein E (apoE) to tau, which prompted the hypothesis that apoE binding may protect tau from phosphorylation, apoE3 being more efficient than apoE4. We have, therefore, investigated the effects of apoE on tau phosphorylation in vitro by the proline-directed kinase, glycogen synthase kinase (GSK)-3 beta. The phosphopeptide maps of tau alone, of tau with apoE3 and of tau with apoE4 were very similar. When apoE2 was present a further four spots were evident. Additionally, of the 15 peptides phosphorylated in the presence or absence of apoE, subtle differences, some isoform-specific, in the relative amounts of phosphorylation were observed.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Apolipoproteins E
/
Tau Proteins
/
Calcium-Calmodulin-Dependent Protein Kinases
/
Spectrometry, Mass, Electrospray Ionization
Limits:
Humans
Language:
En
Journal:
FEBS Lett
Year:
2000
Document type:
Article
Country of publication:
Reino Unido