ID   PSAE_NOSS8              Reviewed;          70 AA.
AC   Q9WWP1;
DT   01-DEC-2000, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1999, sequence version 1.
DT   25-MAY-2022, entry version 81.
DE   RecName: Full=Photosystem I reaction center subunit IV;
GN   Name=psaE;
OS   Nostoc sp. (strain PCC 8009).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Nostoc.
OX   NCBI_TaxID=29413;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RA   Rhiel E., Bryant D.A.;
RT   "Nucleotide sequence of the psaE gene of Nostoc PCC8009.";
RL   Submitted (MAY-1999) to the EMBL/GenBank/DDBJ databases.
RN   [2]
RP   STRUCTURE BY NMR.
RX   PubMed=10521281; DOI=10.1021/bi9910373;
RA   Mayer K.L., Shen G., Bryant D.A., Lecomte J.T.J., Falzone C.J.;
RT   "The solution structure of photosystem I accessory protein E from the
RT   cyanobacterium Nostoc sp. strain PCC 8009.";
RL   Biochemistry 38:13736-13746(1999).
CC   -!- FUNCTION: Stabilizes the interaction between PsaC and the PSI core,
CC       assists the docking of the ferredoxin to PSI and interacts with
CC       ferredoxin-NADP oxidoreductase.
CC   -!- SUBCELLULAR LOCATION: Cellular thylakoid membrane; Peripheral membrane
CC       protein.
CC   -!- SIMILARITY: Belongs to the PsaE family. {ECO:0000305}.
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DR   EMBL; AF148219; AAD38024.1; -; Genomic_DNA.
DR   PDB; 1QP2; NMR; -; A=1-70.
DR   PDB; 1QP3; NMR; -; A=1-70.
DR   PDBsum; 1QP2; -.
DR   PDBsum; 1QP3; -.
DR   AlphaFoldDB; Q9WWP1; -.
DR   SMR; Q9WWP1; -.
DR   EvolutionaryTrace; Q9WWP1; -.
DR   GO; GO:0009538; C:photosystem I reaction center; IEA:InterPro.
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_00613; PSI_PsaE; 1.
DR   InterPro; IPR008990; Elect_transpt_acc-like_dom_sf.
DR   InterPro; IPR003375; PSI_PsaE.
DR   PANTHER; PTHR34549; PTHR34549; 1.
DR   Pfam; PF02427; PSI_PsaE; 1.
DR   SUPFAM; SSF50090; SSF50090; 1.
PE   1: Evidence at protein level;
KW   3D-structure; Membrane; Photosynthesis; Photosystem I; Thylakoid.
FT   CHAIN           1..70
FT                   /note="Photosystem I reaction center subunit IV"
FT                   /id="PRO_0000204407"
FT   STRAND          7..10
FT                   /evidence="ECO:0007829|PDB:1QP2"
FT   TURN            16..19
FT                   /evidence="ECO:0007829|PDB:1QP2"
FT   STRAND          21..27
FT                   /evidence="ECO:0007829|PDB:1QP2"
FT   STRAND          35..39
FT                   /evidence="ECO:0007829|PDB:1QP2"
FT   STRAND          49..53
FT                   /evidence="ECO:0007829|PDB:1QP2"
FT   HELIX           55..57
FT                   /evidence="ECO:0007829|PDB:1QP2"
FT   STRAND          58..60
FT                   /evidence="ECO:0007829|PDB:1QP2"
SQ   SEQUENCE   70 AA;  7958 MW;  896210EECB6A14A1 CRC64;
     MVQRGSKVRI LRPESYWFQD VGTVASVDQS GIKYPVIVRF EKVNYSGINT NNFAEDELVE
     VEAPKAKPKK