AC PRU00761; DC Domain; TR PROSITE; PS51431; KAIA_C; 1; level=0 XX Names: KaiA C-terminal domain Function: KaiA activation most likely involves direct protein-protein interactions of the N- terminal domain that result in functional modulation of the C-terminal effector domain. XX CC -!- FUNCTION: Component of the kaiABC clock protein complex, which CC constitutes the main circadian regulator in cyanobacteria. The kaiABC CC complex may act as a promoter-nonspecific transcription regulator that CC represses transcription, possibly by acting on the state of chromosome CC compaction. In the complex, it enhances the phosphorylation status of CC kaiC. In contrast, the presence of kaiB in the complex decreases the CC phosphorylation status of kaiC, suggesting that kaiB acts by CC antagonizing the interaction between kaiA and kaiC. A kaiA dimer is CC sufficient to enhance kaiC hexamer phosphorylation. CC -!- SUBUNIT: Homodimer. Component of the kaiABC complex, at least composed CC of a kaiC homohexamer, a kaiB dimer and two kaiA dimers. The kaiABC CC complex also interacts with sasA. CC -!- DOMAIN: The kaiA domain mediates the interaction with kaiC, the CC homodimerization, and is responsible for the clock oscillation CC function. XX GO GO:0007623; P:circadian rhythm XX KW Biological rhythms XX FT From: PS51431 FT DOMAIN from..to FT /note="KaiA C-terminal #" XX Chop: Nter=0; Cter=0; Size: 100-110; Related: None; Repeats: 1; Topology: Undefined; Example: Q6L8L7; Scope: Bacteria; Cyanobacteriota Comments: None; XX # Revision 1.5 2023/02/17 //