ID   FCP_ISOGA               Reviewed;         208 AA.
AC   Q39709;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1997, sequence version 1.
DT   03-AUG-2022, entry version 84.
DE   RecName: Full=Fucoxanthin-chlorophyll a-c binding protein, chloroplastic;
DE            Short=FCP;
DE   Flags: Precursor;
GN   Name=FCP;
OS   Isochrysis galbana (Marine planktonic alga).
OC   Eukaryota; Haptista; Haptophyta; Prymnesiophyceae; Isochrysidales;
OC   Isochrysidaceae; Isochrysis.
OX   NCBI_TaxID=37099;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA], AND PARTIAL PROTEIN SEQUENCE.
RC   STRAIN=DUN;
RX   PubMed=8049362; DOI=10.1007/bf00043865;
RA   Laroche J., Henry D., Wyman K., Sukenik A., Falkowski P.;
RT   "Cloning and nucleotide sequence of a cDNA encoding a major fucoxanthin-
RT   chlorophyll a/c-containing protein from the chrysophyte Isochrysis galbana:
RT   implications for evolution of the cab gene family.";
RL   Plant Mol. Biol. 25:355-368(1994).
CC   -!- FUNCTION: The light-harvesting complex (LHC) functions as a light
CC       receptor, it captures and delivers excitation energy to photosystems
CC       with which it is closely associated. Energy is transferred from the
CC       carotenoid and chlorophyll C (or B) to chlorophyll A and the
CC       photosynthetic reaction centers where it is used to synthesize ATP and
CC       reducing power.
CC   -!- SUBUNIT: The LHC complex of chromophytic algae is composed of
CC       fucoxanthin, chlorophyll A and C bound non-covalently by fucoxanthin
CC       chlorophyll proteins (FCPs). The ratio of pigments in this LHC is;
CC       fucoxanthin: chlorophyll C: chlorophyll A; (0.6-1): (0.1-0.3): (1).
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane.
CC       Note=FCPs are probably transported across the endoplasmic reticulum
CC       membranes that surround the plastid via a signal peptide, followed by
CC       translocation across the thylakoid membrane via a transit peptide.
CC   -!- INDUCTION: Expression is increased 5-fold under conditions of low
CC       light.
CC   -!- SIMILARITY: Belongs to the fucoxanthin chlorophyll protein family.
CC       {ECO:0000305}.
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DR   EMBL; X77333; CAA54547.1; -; mRNA.
DR   PIR; S46301; S46301.
DR   AlphaFoldDB; Q39709; -.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0030076; C:light-harvesting complex; IEA:UniProtKB-KW.
DR   GO; GO:0009523; C:photosystem II; IEA:UniProtKB-KW.
DR   GO; GO:0016168; F:chlorophyll binding; IEA:UniProtKB-KW.
DR   GO; GO:0009765; P:photosynthesis, light harvesting; IEA:InterPro.
DR   InterPro; IPR001344; Chloro_AB-bd_pln.
DR   InterPro; IPR022796; Chloroa_b-bind.
DR   PANTHER; PTHR21649; PTHR21649; 1.
DR   Pfam; PF00504; Chloroa_b-bind; 1.
PE   1: Evidence at protein level;
KW   Chlorophyll; Chloroplast; Chromophore; Direct protein sequencing;
KW   Light-harvesting polypeptide; Membrane; Photosynthesis; Photosystem II;
KW   Plastid; Thylakoid; Transit peptide; Transmembrane; Transmembrane helix.
FT   TRANSIT         1..31
FT                   /note="Chloroplast"
FT                   /evidence="ECO:0000305"
FT   CHAIN           32..208
FT                   /note="Fucoxanthin-chlorophyll a-c binding protein,
FT                   chloroplastic"
FT                   /id="PRO_0000021245"
FT   TRANSMEM        102..118
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   208 AA;  22472 MW;  21A36700137A0F1B CRC64;
     MMTLASLPST AIAGLASAAP KVQPRMAAND EFAYGLPGGA NILGEFDPAG FLKGKDKLEV
     YRLREAETTH GRVAMLASLG FVVQEKFHPL FSGDNGPAIE QIPQLPYWLW IVMTIGIGRA
     ELFRIQKGWA KVNPETGKAD SALREGYEPG DLGFDPLGLA PSDPDEFRLM QEKELSHGRL
     AMIAAAGFLA QEAVSGDTWG TYWGDATF