ID   PHEB_PROMP              Reviewed;         175 AA.
AC   Q7V2Z3;
DT   11-JAN-2011, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   03-AUG-2022, entry version 95.
DE   RecName: Full=R-phycoerythrin subunit beta;
GN   Name=cpeB; OrderedLocusNames=PMM0305;
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).
RN   [2]
RP   CHROMOPHORE-BINDING, INDUCTION, AND MUTAGENESIS OF CYS-61 AND CYS-82.
RC   STRAIN=CCMP1986 / NIES-2087 / MED4;
RX   PubMed=16156734; DOI=10.1111/j.1462-2920.2005.00855.x;
RA   Steglich C., Frankenberg-Dinkel N., Penno S., Hess W.R.;
RT   "A green light-absorbing phycoerythrin is present in the high-light-adapted
RT   marine cyanobacterium Prochlorococcus sp. MED4.";
RL   Environ. Microbiol. 7:1611-1618(2005).
RN   [3]
RP   CHROMOPHORE-BINDING, AND SUBUNIT.
RC   STRAIN=CCMP1986 / NIES-2087 / MED4;
RX   PubMed=20876568; DOI=10.1074/jbc.m110.172619;
RA   Wiethaus J., Busch A.W., Kock K., Leichert L.I., Herrmann C.,
RA   Frankenberg-Dinkel N.;
RT   "CpeS is a lyase specific for attachment of 3Z-PEB to Cys82 of {beta}-
RT   phycoerythrin from Prochlorococcus marinus MED4.";
RL   J. Biol. Chem. 285:37561-37569(2010).
CC   -!- FUNCTION: Green-light absorbing phycoerythrin of unknown function.
CC   -!- SUBUNIT: Homodimer. {ECO:0000269|PubMed:20876568}.
CC   -!- INDUCTION: Constitutively expressed at very low levels.
CC       {ECO:0000269|PubMed:16156734}.
CC   -!- PTM: Contains one covalently linked phycoerythrobilin chromophore.
CC   -!- MISCELLANEOUS: Prochlorococcus does not possess phycobilisomes, instead
CC       it uses a divinyl-chlorophyll antenna complex for light harvesting.
CC   -!- SIMILARITY: Belongs to the phycobiliprotein family. {ECO:0000305}.
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DR   EMBL; BX548174; CAE18764.1; -; Genomic_DNA.
DR   RefSeq; WP_011131942.1; NC_005072.1.
DR   AlphaFoldDB; Q7V2Z3; -.
DR   SMR; Q7V2Z3; -.
DR   STRING; 59919.PMM0305; -.
DR   EnsemblBacteria; CAE18764; CAE18764; PMM0305.
DR   KEGG; pmm:PMM0305; -.
DR   eggNOG; ENOG502ZAPU; Bacteria.
DR   HOGENOM; CLU_104219_0_0_3; -.
DR   OMA; CYPTRRM; -.
DR   OrthoDB; 1300235at2; -.
DR   Proteomes; UP000001026; Chromosome.
DR   GO; GO:0030089; C:phycobilisome; IEA:InterPro.
DR   GO; GO:0015979; P:photosynthesis; IEA:InterPro.
DR   Gene3D; 1.10.490.20; -; 1.
DR   InterPro; IPR009050; Globin-like_sf.
DR   InterPro; IPR012128; Phycobilisome_asu/bsu.
DR   InterPro; IPR038719; Phycobilisome_asu/bsu_sf.
DR   Pfam; PF00502; Phycobilisome; 1.
DR   PIRSF; PIRSF000081; Phycocyanin; 1.
DR   SUPFAM; SSF46458; SSF46458; 1.
PE   1: Evidence at protein level;
KW   Bile pigment; Chromophore.
FT   CHAIN           1..175
FT                   /note="R-phycoerythrin subunit beta"
FT                   /id="PRO_0000403183"
FT   BINDING         82
FT                   /ligand="(2R,3E)-phycoerythrobilin"
FT                   /ligand_id="ChEBI:CHEBI:85276"
FT                   /ligand_label="1"
FT                   /note="covalent, via 1 link"
FT                   /evidence="ECO:0000305"
FT   MUTAGEN         61
FT                   /note="C->R: No effect on chromophorylation."
FT                   /evidence="ECO:0000269|PubMed:16156734"
FT   MUTAGEN         82
FT                   /note="C->S: Loss of chromophorylation."
FT                   /evidence="ECO:0000269|PubMed:16156734"
SQ   SEQUENCE   175 AA;  19606 MW;  062D640810100CFD CRC64;
     MTVSKSNQIL SNDRDLENIS NKNIEDIKEF INTANSRLDA IDSITNNSHA IAADAVTAMI
     CENQDSVNTK ISLDTTNKMS VCLRDGEIIL RIVSYLLISD DESVLSKNCL KDLKNTYLAL
     GVPLKNAIRV FELMRDATIS DLKSTVNSMK GEKEFLSDLI SNTEFQFERI INLLR