ID   PSAX_TRIV2              Reviewed;          44 AA.
AC   P23319; Q3M8R9;
DT   01-NOV-1991, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   25-MAY-2022, entry version 101.
DE   RecName: Full=Photosystem I 4.8 kDa protein;
GN   Name=psaX; OrderedLocusNames=Ava_3007;
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 [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   [2]
RP   PROTEIN SEQUENCE OF 2-40.
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   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane {ECO:0000250};
CC       Single-pass membrane protein {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the PsaX family. {ECO:0000305}.
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DR   EMBL; CP000117; ABA22617.1; -; Genomic_DNA.
DR   PIR; S16978; S16978.
DR   AlphaFoldDB; P23319; -.
DR   SMR; P23319; -.
DR   STRING; 240292.Ava_3007; -.
DR   EnsemblBacteria; ABA22617; ABA22617; Ava_3007.
DR   KEGG; ava:Ava_3007; -.
DR   eggNOG; ENOG5033C9V; Bacteria.
DR   HOGENOM; CLU_209143_1_0_3; -.
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-KW.
DR   InterPro; IPR012986; PSI_PsaX.
DR   InterPro; IPR036243; PSI_PsaX_sf.
DR   Pfam; PF08078; PsaX; 1.
DR   SUPFAM; SSF81552; SSF81552; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Membrane; Photosynthesis; Photosystem I;
KW   Thylakoid; Transmembrane; Transmembrane helix.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:1908790"
FT   CHAIN           2..44
FT                   /note="Photosystem I 4.8 kDa protein"
FT                   /id="PRO_0000207775"
FT   TRANSMEM        23..43
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   44 AA;  4840 MW;  AFDE32A1B385B623 CRC64;
     MAKAKTPAVA NTGAKPPYTF RTAWALLLLG VNFLVAAYYF HIIQ