Download MendeleyCrystal structure of Arabidopsis thaliana casein kinase 2 alpha 1.
Demulder, M., De Veylder, L., Loris, R.(2020) Acta Crystallogr F Struct Biol Commun 76: 182-191
- PubMed: 32254052
- DOI: https://doi.org/10.1107/S2053230X20004537
- Primary Citation of Related Structures:
6XX6, 6XX7, 6XX8, 6XX9 - PubMed Abstract:
Casein kinase 2 (CK2) is a ubiquitous pleiotropic enzyme that is highly conserved across eukaryotic kingdoms. CK2 is singular amongst kinases as it is highly rigid and constitutively active. Arabidopsis thaliana is widely used as a model system in molecular plant research; the biological functions of A. thaliana CK2 are well studied in vivo and many of its substrates have been identified. Here, crystal structures of the α subunit of A. thaliana CK2 in three crystal forms and of its complex with the nonhydrolyzable ATP analog AMppNHp are presented. While the C-lobe of the enzyme is highly rigid, structural plasticity is observed for the N-lobe. Small but significant displacements within the active cleft are necessary in order to avoid steric clashes with the AMppNHp molecule. Binding of AMppNHp is influenced by a rigid-body motion of the N-lobe that was not previously recognized in maize CK2.
Organizational Affiliation:
Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussels, Belgium.
