ID   PSAI_HORVU              Reviewed;          36 AA.
AC   P13165; A1E9K0;
DT   01-JAN-1990, integrated into UniProtKB/Swiss-Prot.
DT   01-JAN-1990, sequence version 1.
DT   25-MAY-2022, entry version 90.
DE   RecName: Full=Photosystem I reaction center subunit VIII;
DE            Short=PSI-I;
GN   Name=psaI;
OS   Hordeum vulgare (Barley).
OG   Plastid; Chloroplast.
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; Liliopsida; Poales; Poaceae; BOP clade;
OC   Pooideae; Triticodae; Triticeae; Hordeinae; Hordeum.
OX   NCBI_TaxID=4513;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=2681197; DOI=10.1016/s0021-9258(18)51479-4;
RA   Scheller H.V., Okkels J.S., Hoej P.B., Svendsen I., Roepstorff P.,
RA   Moeller B.L.;
RT   "The primary structure of a 4.0-kDa photosystem I polypeptide encoded by
RT   the chloroplast psaI gene.";
RL   J. Biol. Chem. 264:18402-18406(1989).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=cv. Morex;
RX   PubMed=17534593; DOI=10.1007/s00122-007-0567-4;
RA   Saski C., Lee S.-B., Fjellheim S., Guda C., Jansen R.K., Luo H.,
RA   Tomkins J., Rognli O.A., Daniell H., Clarke J.L.;
RT   "Complete chloroplast genome sequences of Hordeum vulgare, Sorghum bicolor
RT   and Agrostis stolonifera, and comparative analyses with other grass
RT   genomes.";
RL   Theor. Appl. Genet. 115:571-590(2007).
RN   [3]
RP   IDENTIFICATION BY MASS SPECTROMETRY, SUBUNIT, AND SUBCELLULAR LOCATION.
RC   STRAIN=cv. Steffi;
RX   PubMed=19137553; DOI=10.1002/pmic.200800337;
RA   Ploescher M., Granvogl B., Zoryan M., Reisinger V., Eichacker L.A.;
RT   "Mass spectrometric characterization of membrane integral low molecular
RT   weight proteins from photosystem II in barley etioplasts.";
RL   Proteomics 9:625-635(2009).
CC   -!- FUNCTION: May help in the organization of the PsaL subunit.
CC   -!- SUBUNIT: PSI consists of a core antenna complex that captures photons,
CC       and an electron transfer chain that converts photonic excitation into a
CC       charge separation. The eukaryotic PSI reaction center is composed of at
CC       least 11 subunits. Only detected in green leaves and not etioplasts;
CC       PSI is only assembled in green leaves (PubMed:19137553).
CC       {ECO:0000269|PubMed:19137553}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000305|PubMed:19137553}; Single-pass membrane protein
CC       {ECO:0000305|PubMed:19137553}.
CC   -!- SIMILARITY: Belongs to the PsaI family. {ECO:0000305}.
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DR   EMBL; J05104; AAA84050.1; -; Genomic_DNA.
DR   EMBL; EF115541; ABK79422.1; -; Genomic_DNA.
DR   PIR; A34302; A34302.
DR   RefSeq; YP_874662.1; NC_008590.1.
DR   AlphaFoldDB; P13165; -.
DR   SMR; P13165; -.
DR   GeneID; 4525189; -.
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:0009522; C:photosystem I; IEA:UniProtKB-KW.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_00431; PSI_PsaI; 1.
DR   InterPro; IPR001302; PSI_PsaI.
DR   InterPro; IPR036357; PSI_PsaI_sf.
DR   PANTHER; PTHR35775; PTHR35775; 1.
DR   Pfam; PF00796; PSI_8; 1.
DR   SUPFAM; SSF81540; SSF81540; 1.
DR   TIGRFAMs; TIGR03052; PS_I_psaI; 1.
PE   1: Evidence at protein level;
KW   Chloroplast; Membrane; Photosynthesis; Photosystem I; Plastid; Thylakoid;
KW   Transmembrane; Transmembrane helix.
FT   CHAIN           1..36
FT                   /note="Photosystem I reaction center subunit VIII"
FT                   /id="PRO_0000194655"
FT   TRANSMEM        10..30
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   36 AA;  4008 MW;  4B94E243933486C5 CRC64;
     MTDLNLPSIF VPLVGLVFPA IAMTSLFLYV QKKKIV