PSBI_CHLRE
ID PSBI_CHLRE Reviewed; 37 AA.
AC P59763; B7U1J1;
DT 03-JUL-2003, integrated into UniProtKB/Swiss-Prot.
DT 03-JUL-2003, sequence version 1.
DT 25-MAY-2022, entry version 78.
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 4.8 kDa protein {ECO:0000255|HAMAP-Rule:MF_01316};
GN Name=psbI {ECO:0000255|HAMAP-Rule:MF_01316};
OS Chlamydomonas reinhardtii (Chlamydomonas smithii).
OG Plastid; Chloroplast.
OC Eukaryota; Viridiplantae; Chlorophyta; core chlorophytes; Chlorophyceae;
OC CS clade; Chlamydomonadales; Chlamydomonadaceae; Chlamydomonas.
OX NCBI_TaxID=3055;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CC-503;
RX PubMed=19473533; DOI=10.1186/1471-2148-9-120;
RA Smith D.R., Lee R.W.;
RT "Nucleotide diversity of the Chlamydomonas reinhardtii plastid genome:
RT addressing the mutational-hazard hypothesis.";
RL BMC Evol. Biol. 9:120-120(2009).
RN [2]
RP IDENTIFICATION, AND COMPLETE PLASTID GENOME.
RX PubMed=12417694; DOI=10.1105/tpc.006155;
RA Maul J.E., Lilly J.W., Cui L., dePamphilis C.W., Miller W., Harris E.H.,
RA Stern D.B.;
RT "The Chlamydomonas reinhardtii plastid chromosome: islands of genes in a
RT sea of repeats.";
RL Plant Cell 14:2659-2679(2002).
RN [3]
RP FUNCTION, AND DISRUPTION PHENOTYPE.
RC STRAIN=137c / CC-125;
RX PubMed=7721898; DOI=10.1074/jbc.270.16.9651;
RA Kuenstner P., Guardiola A., Takahashi Y., Rochaix J.D.;
RT "A mutant strain of Chlamydomonas reinhardtii lacking the chloroplast
RT photosystem II psbI gene grows photoautotrophically.";
RL J. Biol. Chem. 270:9651-9654(1995).
CC -!- FUNCTION: One of the components of the core complex of photosystem II
CC (PSII), required for its stability and/or assembly (PubMed:7721898).
CC PSII is a light-driven water:plastoquinone oxidoreductase that uses
CC light energy to abstract electrons from H(2)O, generating O(2) and a
CC proton gradient subsequently used for ATP formation. It consists of a
CC core antenna complex that captures photons, and an electron transfer
CC chain that converts photonic excitation into a charge separation.
CC {ECO:0000255|HAMAP-Rule:MF_01316, ECO:0000269|PubMed:7721898}.
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_01316}.
CC -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC {ECO:0000255|HAMAP-Rule:MF_01316}; Single-pass membrane protein
CC {ECO:0000255|HAMAP-Rule:MF_01316}.
CC -!- DISRUPTION PHENOTYPE: Able to grow photoautotrophically only in dim
CC light, oxygen evolution is 10-20% of wild-type, reduced accumulation of
CC protein D1 (PsbA). {ECO:0000269|PubMed:7721898}.
CC -!- SIMILARITY: Belongs to the PsbI family. {ECO:0000255|HAMAP-
CC Rule:MF_01316}.
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DR EMBL; FJ423446; ACJ50138.1; -; Genomic_DNA.
DR EMBL; BK000554; DAA00952.1; -; Genomic_DNA.
DR RefSeq; NP_958407.1; NC_005353.1.
DR PDB; 6KAC; EM; 2.70 A; I/i=1-37.
DR PDB; 6KAD; EM; 3.40 A; I/i=1-37.
DR PDB; 6KAF; EM; 3.73 A; I/i=1-37.
DR PDBsum; 6KAC; -.
DR PDBsum; 6KAD; -.
DR PDBsum; 6KAF; -.
DR AlphaFoldDB; P59763; -.
DR SMR; P59763; -.
DR STRING; 3055.DAA00952; -.
DR PaxDb; P59763; -.
DR GeneID; 2717042; -.
DR KEGG; cre:ChreCp051; -.
DR eggNOG; ENOG502SEUZ; Eukaryota.
DR HOGENOM; CLU_212150_0_0_1; -.
DR InParanoid; P59763; -.
DR OrthoDB; 1641960at2759; -.
DR Proteomes; UP000006906; Chloroplast.
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:0009539; C:photosystem II reaction center; IEA:InterPro.
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 1: Evidence at protein level;
KW 3D-structure; Chloroplast; Membrane; Photosynthesis; Photosystem II;
KW Plastid; Reaction center; Reference proteome; Thylakoid; Transmembrane;
KW Transmembrane helix.
FT CHAIN 1..37
FT /note="Photosystem II reaction center protein I"
FT /id="PRO_0000219621"
FT TRANSMEM 4..24
FT /note="Helical"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01316"
FT HELIX 2..24
FT /evidence="ECO:0007829|PDB:6KAC"
SQ SEQUENCE 37 AA; 4242 MW; 2E38EE38E6E0BB67 CRC64;
MLTLKIFVYT VVTFFVCLFI FGFLSNDPAR NPGKNLD
