PubMed: 21548880

Title
TTBK2 kinase substrate specificity and the impact of spinocerebellar-ataxia-causing mutations on expression, activity, localization and development.
Journal
The Biochemical journal
Volume
437
Issue
None
Pages
157-67
Date
2011-07-01
Authors
Alessi DR | Begley MJ | Bouskila M | Cantley LC | Deak M | Esoof N | Fang EH | Gay L | Prescott A | Storey KG

Evidence 245f94f2fe

Significant association with a reduced risk of LOAD (odds ratio/OR=0.69). rs2651206 polymorphism was strongly associated with LOAD (OR=0.72) (age, gender, and APOE adjusted). The TG haplotype, deriving from the two minor alleles, decreases risk of LOAD (OR=0.78, P=0.037).

Evidence 142b8122ec

TTBK1-Tg mice show significant age-dependent memory impairment as determined by radial arm water maze test, which is associated with enhancement of tau and neurofilament phosphorylation, increased levels of p25 and p35, both activators of cyclin-dependent protein kinase 5 (CDK5), enhanced calpain I activity, and reduced levels of hippocampal NMDA receptor types 2B (NR2B) and D. Enhanced CDK5/p35 complex formation is strongly correlated with dissociation of F-actin from p35, suggesting the inhibitory mechanism of CDK5/p35 complex formation by F-actin.

Evidence 9feee05c8c

SCA11 truncating mutations promote TTBK2 protein expression, suppress kinase activity and lead to enhanced nuclear localization. Using a SCA11-mutation-carrying knockin mouse we show that this leads to inhibition of endogenous TTBK2 protein kinase activity.

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