ID   PSAI_TRIV2              Reviewed;          46 AA.
AC   P23079;
DT   01-NOV-1991, integrated into UniProtKB/Swiss-Prot.
DT   01-JUL-1993, sequence version 2.
DT   25-MAY-2022, entry version 117.
DE   RecName: Full=Photosystem I reaction center subunit VIII;
DE   Flags: Precursor;
GN   Name=psaI; OrderedLocusNames=Ava_1851.1;
OS   Trichormus variabilis (strain ATCC 29413 / PCC 7937) (Anabaena variabilis).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Trichormus.
OX   NCBI_TaxID=240292;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=1463834; DOI=10.1007/bf00027168;
RA   Sonoike K., Ikeuchi M., Pakrasi H.B.;
RT   "Presence of an N-terminal presequence in the PsaI protein of the
RT   photosystem I complex in the filamentous cyanobacterium Anabaena variabilis
RT   ATCC 29413.";
RL   Plant Mol. Biol. 20:987-990(1992).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29413 / PCC 7937;
RX   PubMed=25197444; DOI=10.4056/sigs.3899418;
RA   Thiel T., Pratte B.S., Zhong J., Goodwin L., Copeland A., Lucas S., Han C.,
RA   Pitluck S., Land M.L., Kyrpides N.C., Woyke T.;
RT   "Complete genome sequence of Anabaena variabilis ATCC 29413.";
RL   Stand. Genomic Sci. 9:562-573(2014).
RN   [3]
RP   PROTEIN SEQUENCE OF 12-46.
RX   PubMed=1908790; DOI=10.1016/0014-5793(91)80003-l;
RA   Ikeuchi M., Nyhus K.J., Inoue Y., Pakrasi H.B.;
RT   "Identities of four low-molecular-mass subunits of the photosystem I
RT   complex from Anabaena variabilis ATCC 29413. Evidence for the presence of
RT   the psaI gene product in a cyanobacterial complex.";
RL   FEBS Lett. 287:5-9(1991).
CC   -!- FUNCTION: May help in the organization of the PsaL subunit.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000250};
CC       Single-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the PsaI family. {ECO:0000305}.
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DR   EMBL; X66864; CAA47333.1; -; Genomic_DNA.
DR   EMBL; CP000117; -; NOT_ANNOTATED_CDS; Genomic_DNA.
DR   PIR; S28008; S28008.
DR   AlphaFoldDB; P23079; -.
DR   SMR; P23079; -.
DR   Proteomes; UP000002533; Chromosome.
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:0031676; C:plasma membrane-derived thylakoid membrane; IEA:UniProtKB-SubCell.
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   Pfam; PF00796; PSI_8; 1.
DR   SUPFAM; SSF81540; SSF81540; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Membrane; Photosynthesis; Photosystem I;
KW   Thylakoid; Transmembrane; Transmembrane helix.
FT   PROPEP          1..11
FT                   /evidence="ECO:0000269|PubMed:1908790"
FT                   /id="PRO_0000029422"
FT   CHAIN           12..46
FT                   /note="Photosystem I reaction center subunit VIII"
FT                   /id="PRO_0000029423"
FT   TRANSMEM        20..40
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   46 AA;  4967 MW;  4EDBCA058B5D0AA9 CRC64;
     MATAFLPSIL ADASFLSSIF VPVIGWVVPI ATFSFLFLYI EGEDVA