ID   KAIB_PROMP              Reviewed;         107 AA.
AC   Q7V0C3;
DT   11-OCT-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   25-MAY-2022, entry version 92.
DE   RecName: Full=Circadian clock protein KaiB {ECO:0000255|HAMAP-Rule:MF_01835};
GN   Name=kaiB {ECO:0000255|HAMAP-Rule:MF_01835}; OrderedLocusNames=PMM1343;
OS   Prochlorococcus marinus subsp. pastoris (strain CCMP1986 / NIES-2087 /
OS   MED4).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=59919;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCMP1986 / NIES-2087 / MED4;
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; BX548174; CAE19802.1; -; Genomic_DNA.
DR   RefSeq; WP_011132977.1; NC_005072.1.
DR   AlphaFoldDB; Q7V0C3; -.
DR   SMR; Q7V0C3; -.
DR   STRING; 59919.PMM1343; -.
DR   EnsemblBacteria; CAE19802; CAE19802; PMM1343.
DR   KEGG; pmm:PMM1343; -.
DR   eggNOG; COG4251; Bacteria.
DR   HOGENOM; CLU_144073_0_0_3; -.
DR   OMA; NEFKGVY; -.
DR   OrthoDB; 1999883at2; -.
DR   Proteomes; UP000001026; 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.
FT   CHAIN           1..107
FT                   /note="Circadian clock protein KaiB"
FT                   /id="PRO_0000217764"
SQ   SEQUENCE   107 AA;  11957 MW;  B73777EBAE774956 CRC64;
     MVARKTYILK LYVAGNTPNS MRALNTLKEI LENEFKGVYA LKVIDVLKQP QLAEEDKILA
     TPTLAKILPP PVRRIIGDLS DREKVLIGLD LLFDELSESE YSGGTKN