ID   PSBB_PORPU              Reviewed;         509 AA.
AC   P51322;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   03-AUG-2022, entry version 79.
DE   RecName: Full=Photosystem II CP47 reaction center protein {ECO:0000255|HAMAP-Rule:MF_01495};
DE   AltName: Full=PSII 47 kDa protein {ECO:0000255|HAMAP-Rule:MF_01495};
DE   AltName: Full=Protein CP-47 {ECO:0000255|HAMAP-Rule:MF_01495};
GN   Name=psbB {ECO:0000255|HAMAP-Rule:MF_01495};
OS   Porphyra purpurea (Red seaweed) (Ulva purpurea).
OG   Plastid; Chloroplast.
OC   Eukaryota; Rhodophyta; Bangiophyceae; Bangiales; Bangiaceae; Porphyra.
OX   NCBI_TaxID=2787;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Avonport;
RA   Reith M.E., Munholland J.;
RT   "Complete nucleotide sequence of the Porphyra purpurea chloroplast
RT   genome.";
RL   Plant Mol. Biol. Rep. 13:333-335(1995).
CC   -!- FUNCTION: One of the components of the core complex of photosystem II
CC       (PSII). It binds chlorophyll and helps catalyze the primary light-
CC       induced photochemical processes of PSII. PSII is a light-driven
CC       water:plastoquinone oxidoreductase, using light energy to abstract
CC       electrons from H(2)O, generating O(2) and a proton gradient
CC       subsequently used for ATP formation. {ECO:0000255|HAMAP-Rule:MF_01495}.
CC   -!- COFACTOR:
CC       Note=Binds multiple chlorophylls. PSII binds additional chlorophylls,
CC       carotenoids and specific lipids. {ECO:0000255|HAMAP-Rule:MF_01495};
CC   -!- SUBUNIT: PSII is composed of 1 copy each of membrane proteins PsbA,
CC       PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK, PsbL, PsbM, PsbT,
CC       PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral proteins of the oxygen-
CC       evolving complex and a large number of cofactors. It forms dimeric
CC       complexes. {ECO:0000255|HAMAP-Rule:MF_01495}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000255|HAMAP-Rule:MF_01495}; Multi-pass membrane protein
CC       {ECO:0000255|HAMAP-Rule:MF_01495}.
CC   -!- SIMILARITY: Belongs to the PsbB/PsbC family. PsbB subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01495}.
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DR   EMBL; U38804; AAC08208.1; -; Genomic_DNA.
DR   PIR; S73243; S73243.
DR   RefSeq; NP_053932.1; NC_000925.1.
DR   AlphaFoldDB; P51322; -.
DR   SMR; P51322; -.
DR   GeneID; 809951; -.
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:0009523; C:photosystem II; IEA:UniProtKB-KW.
DR   GO; GO:0016168; F:chlorophyll binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0045156; F:electron transporter, transferring electrons within the cyclic electron transport pathway of photosynthesis activity; IEA:InterPro.
DR   GO; GO:0009772; P:photosynthetic electron transport in photosystem II; IEA:InterPro.
DR   HAMAP; MF_01495; PSII_PsbB_CP47; 1.
DR   InterPro; IPR000932; PS_antenna-like.
DR   InterPro; IPR036001; PS_II_antenna-like_sf.
DR   InterPro; IPR017486; PSII_PsbB.
DR   PANTHER; PTHR33180; PTHR33180; 1.
DR   Pfam; PF00421; PSII; 1.
DR   SUPFAM; SSF161077; SSF161077; 1.
DR   TIGRFAMs; TIGR03039; PS_II_CP47; 1.
PE   3: Inferred from homology;
KW   Chlorophyll; Chloroplast; Chromophore; Membrane; Photosynthesis;
KW   Photosystem II; Plastid; Thylakoid; Transmembrane; Transmembrane helix.
FT   CHAIN           1..509
FT                   /note="Photosystem II CP47 reaction center protein"
FT                   /id="PRO_0000077496"
FT   TRANSMEM        21..36
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01495"
FT   TRANSMEM        101..115
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01495"
FT   TRANSMEM        140..156
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01495"
FT   TRANSMEM        203..218
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01495"
FT   TRANSMEM        237..252
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01495"
FT   TRANSMEM        457..472
FT                   /note="Helical"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01495"
SQ   SEQUENCE   509 AA;  56080 MW;  01D1C508B02CF245 CRC64;
     MGLPWYRVHT VVLNDPGRLI AVHLMHTALV AGWAGSMALY ELAVFDPSDP VLNPMWRQGM
     FVMPFMARLG VTDSWGGWSI TGESVSNPGL WSLEGVALTH IVLSGMLFLA AIWHWVYWDL
     ELFRDPRTGE PALDLPKIFG IHLLLSSLLC FGFGAFHVTG LFGPGMWVSD GYGVTGKVLP
     VAPAWGPEGF NPFNPGGVAS HHIAAGTVGI LAGVFHLTVR PPQRLYRALR MGNIETVLSS
     SISAVFFSAF ITCGTMWYGS ATTPIELFGP TRYQWDSGYF QQEIEKRVEN AIADGAAPSE
     AWSRIPDKLA FYDYIGNNPA KGGLFRAGPM NKGDGVAEAW LGHPVFQDKE GRELSVRRMP
     AFFETFPVIL VDKDGIIRAD IPFRRAESKY SIEQVGVTAS FYGGKLNGQV FNDAPSVKKY
     ARKAQLGEVF EFDRTTLESD GVFRSSPRGW FTFGHANFAL IFFFGHLWHG SRTIFRDVFA
     GIGAEVTEQV EFGAFQKLGD RSSKKQGAV