6VRF

ADP bound TTBK2 kinase domain

6VRF の概要

• エントリーDOI: 10.2210/pdb6vrf/pdb
• 分子名称: Tau-tubulin kinase 2, ADENOSINE-5'-DIPHOSPHATE, PHOSPHATE ION, ... (7 entities in total)
• 機能のキーワード: ttbk2 kinase domain, transferase
• 由来する生物種: Homo sapiens (Human)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 70608.12

構造登録者

Chodaparambil, J.V.,Marcotte, D.J. (登録日: 2020-02-07, 公開日: 2020-06-03, 最終更新日: 2023-10-11)

主引用文献

Bao, C.,Bajrami, B.,Marcotte, D.J.,Chodaparambil, J.V.,Kerns, H.M.,Henderson, J.,Wei, R.,Gao, B.,Dillon, G.M.
Mechanisms of Regulation and Diverse Activities of Tau-Tubulin Kinase (TTBK) Isoforms.
Cell Mol Neurobiol, 41:669-685, 2021

PubMed Abstract: Tau-tubulin kinase 1 (TTBK1) is a CNS-specific, kinase that has been implicated in the pathological phosphorylation of tau in Alzheimer's Disease (AD) and Frontotemporal Dementia (FTD). TTBK1 is a challenging therapeutic target because it shares a highly conserved catalytic domain with its homolog, TTBK2, a ubiquitously expressed kinase genetically linked to the disease spinocerebellar ataxia type 11. The present study attempts to elucidate the functional distinctions between the TTBK isoforms and increase our understanding of them as distinct targets for the treatment of neurodegenerative disease. We demonstrate that in cortical neurons, TTBK1, not TTBK2, is the isoform responsible for tau phosphorylation at epitopes enriched in tauopathies such as Serine 422. In addition, although our elucidation of the crystal structure of the TTBK2 kinase domain indicates almost identical structural similarity with TTBK1, biochemical and cellular assays demonstrate that the enzymatic activity of these two proteins is regulated by a combination of unique extra-catalytic sequences and autophosphorylation events. Finally, we have identified an unbiased list of neuronal interactors and phosphorylation substrates for TTBK1 and TTBK2 that highlight the unique cellular pathways and functional networks that each isoform is involved in. This data address an important gap in knowledge regarding the implications of targeting TTBK kinases and may prove valuable in the development of potential therapies for disease.

PubMed: 32424773
DOI: 10.1007/s10571-020-00875-6

実験手法

X-RAY DIFFRACTION (1.5 Å)