PCBG_PROMA
ID PCBG_PROMA Reviewed; 353 AA.
AC Q7VC50; Q9L8M0;
DT 24-JAN-2006, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2003, sequence version 1.
DT 03-AUG-2022, entry version 93.
DE RecName: Full=Divinyl chlorophyll a/b light-harvesting protein PcbG;
GN Name=pcbG; OrderedLocusNames=Pro_0892;
OS Prochlorococcus marinus (strain SARG / CCMP1375 / SS120).
OC Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC Prochlorococcus.
OX NCBI_TaxID=167539;
RN [1]
RP NUCLEOTIDE SEQUENCE [GENOMIC DNA], AND FUNCTION.
RC STRAIN=SARG / CCMP1375 / SS120;
RX PubMed=10725393; DOI=10.1073/pnas.070040897;
RA Garczarek L., Hess W.R., Holtzendorff J., van der Staay G.W.M.,
RA Partensky F.;
RT "Multiplication of antenna genes as a major adaptation to low light in a
RT marine prokaryote.";
RL Proc. Natl. Acad. Sci. U.S.A. 97:4098-4101(2000).
RN [2]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=SARG / CCMP1375 / SS120;
RX PubMed=12917486; DOI=10.1073/pnas.1733211100;
RA Dufresne A., Salanoubat M., Partensky F., Artiguenave F., Axmann I.M.,
RA Barbe V., Duprat S., Galperin M.Y., Koonin E.V., Le Gall F., Makarova K.S.,
RA Ostrowski M., Oztas S., Robert C., Rogozin I.B., Scanlan D.J.,
RA Tandeau de Marsac N., Weissenbach J., Wincker P., Wolf Y.I., Hess W.R.;
RT "Genome sequence of the cyanobacterium Prochlorococcus marinus SS120, a
RT nearly minimal oxyphototrophic genome.";
RL Proc. Natl. Acad. Sci. U.S.A. 100:10020-10025(2003).
RN [3]
RP FUNCTION, COFACTOR, SUBUNIT, AND SUBCELLULAR LOCATION.
RC STRAIN=SARG / CCMP1375 / SS120;
RA Partensky F., La Roche J., Wyman K., Falkowski P.G.;
RT "The divinyl-chlorophyll a/b-protein complexes of two strains of the
RT oxyphototrophic marine prokaryote Prochlorococcus -- characterization and
RT response to changes in growth irradiance.";
RL Photosyn. Res. 51:209-222(1997).
RN [4]
RP FORMS A RING AROUND TRIMERIC PSI, AND SUBUNIT.
RC STRAIN=SARG / CCMP1375 / SS120;
RX PubMed=11595938; DOI=10.1038/35098153;
RA Bibby T.S., Nield J., Partensky F., Barber J.;
RT "Oxyphotobacteria. Antenna ring around photosystem I.";
RL Nature 413:590-590(2001).
RN [5]
RP INDUCTION.
RC STRAIN=SARG / CCMP1375 / SS120;
RX PubMed=11575723; DOI=10.1023/a:1011681726654;
RA Garczarek L., van der Staay G.W.M., Hess W.R., Le Gall F., Partensky F.;
RT "Expression and phylogeny of the multiple antenna genes of the low-light-
RT adapted strain Prochlorococcus marinus SS120 (Oxyphotobacteria).";
RL Plant Mol. Biol. 46:683-693(2001).
RN [6]
RP INDUCTION, AND INVOLVEMENT IN COMPLEXES WITH PHOTOSYSTEM I UNDER
RP IRON-REPLETE CONDITIONS.
RX PubMed=12944966; DOI=10.1038/nature01933;
RA Bibby T.S., Mary I., Nield J., Partensky F., Barber J.;
RT "Low-light-adapted Prochlorococcus species possess specific antennae for
RT each photosystem.";
RL Nature 424:1051-1054(2003).
CC -!- FUNCTION: The antenna complex functions as a light receptor, it
CC captures and delivers excitation energy to photosystems I. The
CC Prochlorales pcb genes are not related to higher plant LHCs.
CC {ECO:0000250|UniProtKB:Q6Q972, ECO:0000303|PubMed:10725393,
CC ECO:0000303|Ref.3}.
CC -!- COFACTOR:
CC Name=divinyl chlorophyll a; Xref=ChEBI:CHEBI:73095;
CC Evidence={ECO:0000303|Ref.3};
CC -!- COFACTOR:
CC Name=divinyl chlorophyll b; Xref=ChEBI:CHEBI:73096;
CC Evidence={ECO:0000303|Ref.3};
CC -!- SUBUNIT: The antenna complex consists of divinyl chlorophylls (a and b)
CC and divinyl chlorophyll a/b binding proteins and binds more divinyl
CC chlorophyll b than does the antenna complex from high-light-adapted
CC Prochlorococcus. Also forms complexes with PSI, consisting of a PSI
CC trimer with surrounded by a PcbG ring (probably with 18 subunits). Is
CC the only subunit found in this ring under iron-replete conditions.
CC {ECO:0000269|PubMed:11595938, ECO:0000269|Ref.3}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000269|Ref.3};
CC Multi-pass membrane protein {ECO:0000250}.
CC -!- INDUCTION: This transcript is moderately expressed at low and high
CC light levels and is expressed somewhat more at 16 and 45 umol blue
CC light/m2/s. The whole antenna complex is most highly expressed under
CC low light; as the light levels increase antenna complex levels
CC decrease. Thus at least in this strain the amount of antenna complex is
CC controlled mostly at a post-transcriptional level. Transcription
CC decreases upon iron starvation. {ECO:0000269|PubMed:11575723,
CC ECO:0000269|PubMed:12944966}.
CC -!- MISCELLANEOUS: This low-light-adapted strain contains 8 pcb genes.
CC {ECO:0000303|PubMed:12917486, ECO:0000303|PubMed:12944966}.
CC -!- SIMILARITY: Belongs to the PsbB/PsbC family. IsiA/Pcb subfamily.
CC {ECO:0000305}.
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DR EMBL; AF198531; AAF61306.1; -; Genomic_DNA.
DR EMBL; AE017126; AAP99936.1; -; Genomic_DNA.
DR RefSeq; NP_875284.1; NC_005042.1.
DR RefSeq; WP_011125044.1; NC_005042.1.
DR AlphaFoldDB; Q7VC50; -.
DR SMR; Q7VC50; -.
DR STRING; 167539.Pro_0892; -.
DR EnsemblBacteria; AAP99936; AAP99936; Pro_0892.
DR GeneID; 54200233; -.
DR KEGG; pma:Pro_0892; -.
DR PATRIC; fig|167539.5.peg.939; -.
DR eggNOG; ENOG5032GXK; Bacteria.
DR HOGENOM; CLU_028310_0_0_3; -.
DR OMA; FGYNWED; -.
DR OrthoDB; 417558at2; -.
DR Proteomes; UP000001420; Chromosome.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0009522; C:photosystem I; IEA:UniProtKB-KW.
DR GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0016168; F:chlorophyll binding; IEA:UniProtKB-KW.
DR GO; GO:0009767; P:photosynthetic electron transport chain; IEA:InterPro.
DR InterPro; IPR000932; PS_antenna-like.
DR InterPro; IPR036001; PS_II_antenna-like_sf.
DR PANTHER; PTHR33180; PTHR33180; 1.
DR Pfam; PF00421; PSII; 1.
DR SUPFAM; SSF161077; SSF161077; 1.
PE 1: Evidence at protein level;
KW Chlorophyll; Chromophore; Membrane; Photosynthesis; Photosystem I;
KW Reference proteome; Thylakoid; Transmembrane; Transmembrane helix.
FT CHAIN 1..353
FT /note="Divinyl chlorophyll a/b light-harvesting protein
FT PcbG"
FT /id="PRO_0000077544"
FT TRANSMEM 28..48
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 64..84
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 90..110
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 204..224
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 244..264
FT /note="Helical"
FT /evidence="ECO:0000255"
FT TRANSMEM 308..328
FT /note="Helical"
FT /evidence="ECO:0000255"
FT CONFLICT 1..3
FT /note="MQT -> RAD (in Ref. 2; AAF61306)"
FT /evidence="ECO:0000305"
SQ SEQUENCE 353 AA; 38709 MW; C2EF94289C20C363 CRC64;
MQTYGDPNVS YAWYAANAGA VTNKSGRFIS SHIAHTGLIC FGAGANTLFE LARYNPDLPM
GSQGLVVLPH LAGLGLGGIS NGVFTDTYQL LVVAILHLIL SGVYGGGGML HAFRYEEKLE
SYPATSRANK FKFDWNDPDR LTFILGHHLL FLAAGNIQFV EWARVHGIYD PVAGAVRQVE
YNLDLGMIWN HQFDFLSISS LEDIMGGHAF LAFFMAAGGV FHILTKNYGE YNSFKGADLL
SAEFVLSTSL AGAAYTAFVA ALWCASNTTI YPVDLYGDVL QFKLGIAPYW IDTDSSLAAD
AHTGRAWLTN VHFFIGFFYL QGHFFHGLRA LGFDFKSIGK LFDNLETSET TLN
