ID   FRI2_TOBAC              Reviewed;         259 AA.
AC   Q8H1T3;
DT   11-APR-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-MAR-2003, sequence version 1.
DT   03-AUG-2022, entry version 83.
DE   RecName: Full=Ferritin-2, chloroplastic;
DE            EC=1.16.3.1;
DE   AltName: Full=NtFer2;
DE   Flags: Precursor;
GN   Name=FER2;
OS   Nicotiana tabacum (Common 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=4097;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [MRNA].
RA   Jiang T., Yoshihara T., Masuda T., Goto F.;
RT   "Occurrence and expression analysis of two types of the tobacco ferritin
RT   genes.";
RL   Submitted (AUG-2002) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Stores iron in a soluble, non-toxic, readily available form.
CC       Important for iron homeostasis. Has ferroxidase activity. Iron is taken
CC       up in the ferrous form and deposited as ferric hydroxides after
CC       oxidation (By similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=4 Fe(2+) + 4 H(+) + O2 = 4 Fe(3+) + 2 H2O;
CC         Xref=Rhea:RHEA:11148, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:15379, ChEBI:CHEBI:29033, ChEBI:CHEBI:29034; EC=1.16.3.1;
CC   -!- SUBUNIT: Oligomer of 24 subunits. There are two types of subunits: L
CC       (light) chain and H (heavy) chain. The major chain can be light or
CC       heavy, depending on the species and tissue type. The functional
CC       molecule forms a roughly spherical shell with a diameter of 12 nm and
CC       contains a central cavity into which the insoluble mineral iron core is
CC       deposited (By similarity). {ECO:0000250}.
CC   -!- SUBCELLULAR LOCATION: Plastid, chloroplast {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the ferritin family. {ECO:0000305}.
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DR   EMBL; AY141105; AAN06322.1; -; mRNA.
DR   RefSeq; NP_001313209.1; NM_001326280.1.
DR   AlphaFoldDB; Q8H1T3; -.
DR   SMR; Q8H1T3; -.
DR   GeneID; 107832545; -.
DR   KEGG; nta:107832545; -.
DR   Proteomes; UP000084051; Unplaced.
DR   GO; GO:0009507; C:chloroplast; IEA:UniProtKB-SubCell.
DR   GO; GO:0005737; C:cytoplasm; IBA:GO_Central.
DR   GO; GO:0008199; F:ferric iron binding; IBA:GO_Central.
DR   GO; GO:0008198; F:ferrous iron binding; IBA:GO_Central.
DR   GO; GO:0004322; F:ferroxidase activity; IEA:UniProtKB-EC.
DR   GO; GO:0006880; P:intracellular sequestering of iron ion; IBA:GO_Central.
DR   GO; GO:0006826; P:iron ion transport; IEA:InterPro.
DR   Gene3D; 1.20.1260.10; -; 1.
DR   InterPro; IPR001519; Ferritin.
DR   InterPro; IPR012347; Ferritin-like.
DR   InterPro; IPR009040; Ferritin-like_diiron.
DR   InterPro; IPR009078; Ferritin-like_SF.
DR   InterPro; IPR014034; Ferritin_CS.
DR   InterPro; IPR008331; Ferritin_DPS_dom.
DR   PANTHER; PTHR11431; PTHR11431; 1.
DR   Pfam; PF00210; Ferritin; 1.
DR   SUPFAM; SSF47240; SSF47240; 1.
DR   PROSITE; PS00204; FERRITIN_2; 1.
DR   PROSITE; PS50905; FERRITIN_LIKE; 1.
PE   2: Evidence at transcript level;
KW   Chloroplast; Iron; Iron storage; Metal-binding; Oxidoreductase; Plastid;
KW   Reference proteome; Transit peptide.
FT   TRANSIT         1..52
FT                   /note="Chloroplast"
FT                   /evidence="ECO:0000255"
FT   CHAIN           53..259
FT                   /note="Ferritin-2, chloroplastic"
FT                   /id="PRO_0000008869"
FT   DOMAIN          86..239
FT                   /note="Ferritin-like diiron"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00085"
FT   REGION          53..85
FT                   /note="Extension peptide (EP)"
FT   BINDING         103
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00085"
FT   BINDING         138
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00085"
FT   BINDING         138
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00085"
FT   BINDING         141
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00085"
FT   BINDING         221
FT                   /ligand="Fe cation"
FT                   /ligand_id="ChEBI:CHEBI:24875"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00085"
SQ   SEQUENCE   259 AA;  29220 MW;  59997A45142375C3 CRC64;
     MLLKLAPAFT LLNSHGENLS PMLSTSSQGF VLKNFSTKSR NGLLVVCASK GSNTKPLTGV
     VFEPFEEVKK ELMLVPTVPQ VSLARHKYSD QCEAAVNEQI NVEYNVSYVY HGMYAYFDRD
     NVALKGLARF FKESSEEERG HAEKLMEYQN KRGGKVKLQS ILMPLSEFDH AEEGDALYAM
     ELALSLAKLT NQKLLNLHAV ATRNNDVQLA DFVESKYLRE QVEAIKMISE YVAQLRRVGK
     GHGVWHFDQM LLQEEEVVA