ID   PSAEB_NICSY             Reviewed;         143 AA.
AC   Q41229; Q40429;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1996, sequence version 1.
DT   25-MAY-2022, entry version 85.
DE   RecName: Full=Photosystem I reaction center subunit IV B, chloroplastic;
DE            Short=PSI-E B;
DE   Contains:
DE     RecName: Full=Photosystem I reaction center subunit IV B isoform 2;
DE   Flags: Precursor;
GN   Name=PSAEB;
OS   Nicotiana sylvestris (Wood tobacco) (South American tobacco).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   asterids; lamiids; Solanales; Solanaceae; Nicotianoideae; Nicotianeae;
OC   Nicotiana.
OX   NCBI_TaxID=4096;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA], AND PARTIAL PROTEIN SEQUENCE.
RC   TISSUE=Leaf;
RX   PubMed=8069490;
RA   Obokata J., Mikami K., Yamamoto Y., Hayashida N.;
RT   "Microheterogeneity of PSI-E subunit of photosystem I in Nicotiana
RT   sylvestris.";
RL   Plant Cell Physiol. 35:203-209(1994).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=7630948; DOI=10.1104/pp.108.3.1297;
RA   Kubota T., Yamamoto Y.Y., Obokata J.;
RT   "Cloning of a nuclear-encoded photosystem I gene, psaEb, in Nicotiana
RT   sylvestris.";
RL   Plant Physiol. 108:1297-1298(1995).
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. {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast thylakoid membrane
CC       {ECO:0000250}; Peripheral membrane protein {ECO:0000250}.
CC   -!- PTM: 2 isoforms exists (ratio 1:1). With or without the N-terminal
CC       alanine.
CC   -!- SIMILARITY: Belongs to the PsaE family. {ECO:0000305}.
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DR   EMBL; S72358; AAB31705.1; -; mRNA.
DR   EMBL; D42070; BAA07667.1; -; Genomic_DNA.
DR   PIR; T15056; T15056.
DR   PIR; T16963; T16963.
DR   RefSeq; NP_001289527.1; NM_001302598.2.
DR   AlphaFoldDB; Q41229; -.
DR   SMR; Q41229; -.
DR   STRING; 4096.XP_009764524.1; -.
DR   GeneID; 104216219; -.
DR   eggNOG; ENOG502S1U2; Eukaryota.
DR   Proteomes; UP000189701; Unplaced.
DR   GO; GO:0009535; C:chloroplast thylakoid membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0009538; C:photosystem I reaction center; IEA:InterPro.
DR   GO; GO:0015979; P:photosynthesis; IEA:UniProtKB-KW.
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   Chloroplast; Direct protein sequencing; Membrane; Photosynthesis;
KW   Photosystem I; Plastid; Reference proteome; Thylakoid; Transit peptide.
FT   TRANSIT         1..51
FT                   /note="Chloroplast"
FT   CHAIN           52..143
FT                   /note="Photosystem I reaction center subunit IV B,
FT                   chloroplastic"
FT                   /id="PRO_0000029384"
FT   CHAIN           53..141
FT                   /note="Photosystem I reaction center subunit IV B isoform
FT                   2"
FT                   /id="PRO_0000029385"
FT   REGION          56..86
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   CONFLICT        88
FT                   /note="V -> VSTPV (in Ref. 2)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   143 AA;  15224 MW;  30B1EE49C2EC2193 CRC64;
     MASSSMASAA SGFMVATPNI ATSNTAPRTS MLFFSSSKNN TTTNFPRLVV RAAEEAAPPA
     ATATAEGEAP PAKAAKPPPI GPKRGTKVRV LRKESYWYKG VGSVVAVDQD PNTRYPVVVR
     FNKVNYANVS TNNYALDEVE EVK