7DYJ
Crystal Structure of Cyanobacterial Circadian Clock Protein KaiC
Summary for 7DYJ
| Entry DOI | 10.2210/pdb7dyj/pdb |
| Related | 7DXQ |
| Descriptor | Circadian clock protein kinase KaiC, ADENOSINE-5'-TRIPHOSPHATE, MAGNESIUM ION, ... (4 entities in total) |
| Functional Keywords | clock protein, transferase |
| Biological source | Synechococcus elongatus (strain PCC 7942 / FACHB-805) |
| Total number of polymer chains | 2 |
| Total formula weight | 118271.49 |
| Authors | Furuike, Y.,Akiyama, S. (deposition date: 2021-01-22, release date: 2022-04-27, Last modification date: 2023-11-29) |
| Primary citation | Furuike, Y.,Mukaiyama, A.,Ouyang, D.,Ito-Miwa, K.,Simon, D.,Yamashita, E.,Kondo, T.,Akiyama, S. Elucidation of master allostery essential for circadian clock oscillation in cyanobacteria. Sci Adv, 8:eabm8990-eabm8990, 2022 Cited by PubMed Abstract: Spatiotemporal allostery is the source of complex but ordered biological phenomena. To identify the structural basis for allostery that drives the cyanobacterial circadian clock, we crystallized the clock protein KaiC in four distinct states, which cover a whole cycle of phosphor-transfer events at Ser and Thr. The minimal set of allosteric events required for oscillatory nature is a bidirectional coupling between the coil-to-helix transition of the Ser-dependent phospho-switch in the C-terminal domain of KaiC and adenosine 5'-diphosphate release from its N-terminal domain during adenosine triphosphatase cycle. An engineered KaiC protein oscillator consisting of a minimal set of the identified master allosteric events exhibited a monophosphorylation cycle of Ser with a temperature-compensated circadian period, providing design principles for simple posttranslational biochemical circadian oscillators. PubMed: 35427168DOI: 10.1126/sciadv.abm8990 PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.4 Å) |
Structure validation
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