ID   KAIB_PROMM              Reviewed;         119 AA.
AC   Q7V5W6;
DT   11-OCT-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   25-MAY-2022, entry version 96.
DE   RecName: Full=Circadian clock protein KaiB {ECO:0000255|HAMAP-Rule:MF_01835};
GN   Name=kaiB {ECO:0000255|HAMAP-Rule:MF_01835}; OrderedLocusNames=PMT_1419;
OS   Prochlorococcus marinus (strain MIT 9313).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=74547;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=MIT 9313;
RX   PubMed=12917642; DOI=10.1038/nature01947;
RA   Rocap G., Larimer F.W., Lamerdin J.E., Malfatti S., Chain P., Ahlgren N.A.,
RA   Arellano A., Coleman M., Hauser L., Hess W.R., Johnson Z.I., Land M.L.,
RA   Lindell D., Post A.F., Regala W., Shah M., Shaw S.L., Steglich C.,
RA   Sullivan M.B., Ting C.S., Tolonen A., Webb E.A., Zinser E.R.,
RA   Chisholm S.W.;
RT   "Genome divergence in two Prochlorococcus ecotypes reflects oceanic niche
RT   differentiation.";
RL   Nature 424:1042-1047(2003).
CC   -!- FUNCTION: Probable component of the KaiBC clock protein complex, which
CC       constitutes the main circadian regulator in cyanobacteria. In the
CC       complex, it may affect the phosphorylation status of KaiC.
CC       {ECO:0000255|HAMAP-Rule:MF_01835}.
CC   -!- SUBUNIT: Homodimer. Probable component of the KaiBC complex with KaiC
CC       and SasA. {ECO:0000255|HAMAP-Rule:MF_01835}.
CC   -!- SIMILARITY: Belongs to the KaiB family. {ECO:0000255|HAMAP-
CC       Rule:MF_01835}.
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DR   EMBL; BX548175; CAE21594.1; -; Genomic_DNA.
DR   RefSeq; WP_011130787.1; NC_005071.1.
DR   AlphaFoldDB; Q7V5W6; -.
DR   SMR; Q7V5W6; -.
DR   STRING; 74547.PMT_1419; -.
DR   EnsemblBacteria; CAE21594; CAE21594; PMT_1419.
DR   KEGG; pmt:PMT_1419; -.
DR   eggNOG; COG4251; Bacteria.
DR   HOGENOM; CLU_144073_0_0_3; -.
DR   OMA; NEFKGVY; -.
DR   OrthoDB; 1999883at2; -.
DR   Proteomes; UP000001423; Chromosome.
DR   GO; GO:0007623; P:circadian rhythm; IEA:UniProtKB-UniRule.
DR   GO; GO:0042326; P:negative regulation of phosphorylation; IEA:InterPro.
DR   CDD; cd02978; KaiB_like; 1.
DR   HAMAP; MF_01835; KaiB; 1.
DR   InterPro; IPR013474; Circ_KaiB.
DR   InterPro; IPR039022; KaiB-like.
DR   InterPro; IPR011649; KaiB_domain.
DR   InterPro; IPR036249; Thioredoxin-like_sf.
DR   PANTHER; PTHR41709; PTHR41709; 1.
DR   Pfam; PF07689; KaiB; 1.
DR   SMART; SM01248; KaiB; 1.
DR   SUPFAM; SSF52833; SSF52833; 1.
DR   TIGRFAMs; TIGR02654; circ_KaiB; 1.
PE   3: Inferred from homology;
KW   Biological rhythms; Reference proteome.
FT   CHAIN           1..119
FT                   /note="Circadian clock protein KaiB"
FT                   /id="PRO_0000217763"
SQ   SEQUENCE   119 AA;  13222 MW;  E242E9C2F68FB969 CRC64;
     MSPRKTYILK LYVAGNTPNS MRALKTLRDI LENEFRGVYA LKVIDVLKNP QLAEADKILA
     TPTLAKILPP PVRRIIGDLS DRERVLIGLD LLYDEISEEM LGSAELDTLA DDDIASPDS