ID   FRI2_PEA                Reviewed;          13 AA.
AC   P83445;
DT   01-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2002, sequence version 1.
DT   12-AUG-2020, entry version 52.
DE   RecName: Full=Ferritin-2, chloroplastic;
DE            EC=1.16.3.1;
DE   Flags: Fragment;
OS   Pisum sativum (Garden pea).
OC   Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC   Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC   rosids; fabids; Fabales; Fabaceae; Papilionoideae; 50 kb inversion clade;
OC   NPAAA clade; Hologalegina; IRL clade; Fabeae; Pisum.
OX   NCBI_TaxID=3888 {ECO:0000305};
RN   [1] {ECO:0000305}
RP   PROTEIN SEQUENCE, SUBCELLULAR LOCATION, AND TISSUE SPECIFICITY.
RC   STRAIN=cv. Laxton's Progress; TISSUE=Leaf;
RA   Shingles R., McCarty R.E.;
RL   Submitted (SEP-2002) to UniProtKB.
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 inner membrane
CC       {ECO:0000269|Ref.1}. Note=And other plastids.
CC   -!- TISSUE SPECIFICITY: Leaves. {ECO:0000269|Ref.1, ECO:0000305}.
CC   -!- MISCELLANEOUS: On the 2D-gel the determined pI of this protein is:
CC       4.74, its MW is: 25.7 kDa. {ECO:0000305}.
CC   -!- SIMILARITY: Belongs to the ferritin family. {ECO:0000305}.
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DR   GO; GO:0009706; C:chloroplast inner membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0004322; F:ferroxidase activity; IEA:UniProtKB-EC.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0006879; P:cellular iron ion homeostasis; IEA:UniProtKB-KW.
PE   1: Evidence at protein level;
KW   Chloroplast; Direct protein sequencing; Iron; Iron storage; Membrane;
KW   Metal-binding; Oxidoreductase; Plastid; Plastid inner membrane.
FT   CHAIN           1..>13
FT                   /note="Ferritin-2, chloroplastic"
FT                   /id="PRO_0000201084"
FT   NON_TER         13
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   13 AA;  1246 MW;  26C9DC25F334ADC7 CRC64;
     ATTDSPATLT GVI