ID   PSAD_SYNEL              Reviewed;         139 AA.
AC   P0A421; P20452; P20899;
DT   15-MAR-2005, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   25-MAY-2022, entry version 55.
DE   RecName: Full=Photosystem I reaction center subunit II;
DE   AltName: Full=Photosystem I 16 kDa polypeptide;
DE            Short=PSI-D;
GN   Name=psaD;
OS   Synechococcus elongatus.
OC   Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus.
OX   NCBI_TaxID=32046;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8486290; DOI=10.1016/0378-1119(93)90618-d;
RA   Muehlenhoff U., Haehnel W., Witt H.T., Herrmann R.G.;
RT   "Genes encoding eleven subunits of photosystem I from the thermophilic
RT   cyanobacterium Synechococcus sp.";
RL   Gene 127:71-78(1993).
RN   [2]
RP   PROTEIN SEQUENCE OF 2-138.
RX   PubMed=1946334;
RA   Kotani N., Enami I., Aso K., Tsugita A.;
RT   "Amino acid sequence of the 14-kDa protein in the photosystem I reaction
RT   center complex from Synechococcus elongatus naegeli.";
RL   Protein Seq. Data Anal. 4:81-86(1991).
RN   [3]
RP   PROTEIN SEQUENCE OF 2-62.
RX   PubMed=2119498;
RA   Enami I., Kaiho H., Izumi H., Katoh S., Kotani N., Jone C.S., Kamo M.,
RA   Tsugita A.;
RT   "N-terminal amino acid sequence analysis of small subunits of photosystem I
RT   reaction center complex from a thermophilic cyanobacterium, Synechococcus
RT   elongatus nageli.";
RL   Protein Seq. Data Anal. 3:257-262(1990).
CC   -!- FUNCTION: PsaD can form complexes with ferredoxin and ferredoxin-
CC       oxidoreductase in photosystem I (PS I) reaction center.
CC   -!- SIMILARITY: Belongs to the PsaD family. {ECO:0000305}.
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DR   EMBL; X63769; CAA45306.1; -; Genomic_DNA.
DR   PIR; A35567; A35567.
DR   PIR; S17529; S17529.
DR   AlphaFoldDB; P0A421; -.
DR   SMR; P0A421; -.
DR   GO; GO:0009538; C:photosystem I reaction center; IEA:InterPro.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
DR   InterPro; IPR003685; PsaD.
DR   InterPro; IPR036579; PsaD_sf.
DR   PANTHER; PTHR31982; PTHR31982; 1.
DR   Pfam; PF02531; PsaD; 1.
DR   SUPFAM; SSF64234; SSF64234; 1.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Photosynthesis; Photosystem I.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000269|PubMed:1946334,
FT                   ECO:0000269|PubMed:2119498"
FT   CHAIN           2..139
FT                   /note="Photosystem I reaction center subunit II"
FT                   /id="PRO_0000206055"
FT   REGION          113..139
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        116..130
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   CONFLICT        132
FT                   /note="T -> P (in Ref. 2; AA sequence)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   139 AA;  15371 MW;  7073427556CF26F9 CRC64;
     MTTLTGQPPL YGGSTGGLLS AADTEEKYAI TWTSPKEQVF EMPTAGAAVM REGENLVYFA
     RKEQCLALAA QQLRPRKIND YKIYRIFPDG ETVLIHPKDG VFPEKVNKGR EAVNSVPRSI
     GQNPNPSQLK FTGKKPYDP