PSBI_NOSS1
ID PSBI_NOSS1 Reviewed; 38 AA.
AC Q8YXD6;
DT 03-JUL-2003, integrated into UniProtKB/Swiss-Prot.
DT 01-MAR-2002, sequence version 1.
DT 25-MAY-2022, entry version 88.
DE RecName: Full=Photosystem II reaction center protein I {ECO:0000255|HAMAP-Rule:MF_01316};
DE Short=PSII-I {ECO:0000255|HAMAP-Rule:MF_01316};
DE AltName: Full=PSII 4.4 kDa protein {ECO:0000255|HAMAP-Rule:MF_01316};
GN Name=psbI {ECO:0000255|HAMAP-Rule:MF_01316}; OrderedLocusNames=asr1277;
OS Nostoc sp. (strain PCC 7120 / SAG 25.82 / UTEX 2576).
OC Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX NCBI_TaxID=103690;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCC 7120 / SAG 25.82 / UTEX 2576;
RX PubMed=11759840; DOI=10.1093/dnares/8.5.205;
RA Kaneko T., Nakamura Y., Wolk C.P., Kuritz T., Sasamoto S., Watanabe A.,
RA Iriguchi M., Ishikawa A., Kawashima K., Kimura T., Kishida Y., Kohara M.,
RA Matsumoto M., Matsuno A., Muraki A., Nakazaki N., Shimpo S., Sugimoto M.,
RA Takazawa M., Yamada M., Yasuda M., Tabata S.;
RT "Complete genomic sequence of the filamentous nitrogen-fixing
RT cyanobacterium Anabaena sp. strain PCC 7120.";
RL DNA Res. 8:205-213(2001).
CC -!- FUNCTION: One of the components of the core complex of photosystem II
CC (PSII), required for its stability and/or assembly. PSII is a light-
CC driven water:plastoquinone oxidoreductase that uses light energy to
CC abstract electrons from H(2)O, generating O(2) and a proton gradient
CC subsequently used for ATP formation. It consists of a core antenna
CC complex that captures photons, and an electron transfer chain that
CC converts photonic excitation into a charge separation.
CC {ECO:0000255|HAMAP-Rule:MF_01316}.
CC -!- SUBUNIT: Cyanobacterial PSII is composed of 1 copy each of membrane
CC proteins PsbA, PsbB, PsbC, PsbD, PsbE, PsbF, PsbH, PsbI, PsbJ, PsbK,
CC PsbL, PsbM, PsbT, PsbX, PsbY, PsbZ, Ycf12, at least 3 peripheral
CC proteins PsbO, PsbU, PsbV and a large number of cofactors. It forms
CC dimeric complexes. {ECO:0000255|HAMAP-Rule:MF_01316}.
CC -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000255|HAMAP-
CC Rule:MF_01316}; Single-pass membrane protein {ECO:0000255|HAMAP-
CC Rule:MF_01316}.
CC -!- SIMILARITY: Belongs to the PsbI family. {ECO:0000255|HAMAP-
CC Rule:MF_01316}.
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DR EMBL; BA000019; BAB73234.1; -; Genomic_DNA.
DR PIR; AB1966; AB1966.
DR RefSeq; WP_010995449.1; NZ_RSCN01000021.1.
DR AlphaFoldDB; Q8YXD6; -.
DR SMR; Q8YXD6; -.
DR STRING; 103690.17130624; -.
DR EnsemblBacteria; BAB73234; BAB73234; BAB73234.
DR GeneID; 58725766; -.
DR KEGG; ana:asr1277; -.
DR eggNOG; ENOG5033CII; Bacteria.
DR Proteomes; UP000002483; Chromosome.
DR GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR GO; GO:0009539; C:photosystem II reaction center; IEA:InterPro.
DR GO; GO:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
DR GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR HAMAP; MF_01316; PSII_PsbI; 1.
DR InterPro; IPR003686; PSII_PsbI.
DR InterPro; IPR037271; PSII_PsbI_sf.
DR PANTHER; PTHR35772; PTHR35772; 1.
DR Pfam; PF02532; PsbI; 1.
DR SUPFAM; SSF161041; SSF161041; 1.
PE 3: Inferred from homology;
KW Membrane; Photosynthesis; Photosystem II; Reaction center;
KW Reference proteome; Thylakoid; Transmembrane; Transmembrane helix.
FT CHAIN 1..38
FT /note="Photosystem II reaction center protein I"
FT /id="PRO_0000219659"
FT TRANSMEM 4..24
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01316"
SQ SEQUENCE 38 AA; 4301 MW; 7412E257A5B22B5C CRC64;
MLTLKIAVYI VVAFFVAIFV FGFLSNDPAR NPGRRDLE
