ID   FER3_TRIV2              Reviewed;          98 AA.
AC   P46050; Q3M578;
DT   01-NOV-1995, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1995, sequence version 1.
DT   03-AUG-2022, entry version 119.
DE   RecName: Full=Ferredoxin-3;
DE   AltName: Full=Ferredoxin III;
DE            Short=FdIII;
GN   Name=fdxB; OrderedLocusNames=Ava_4259;
OS   Trichormus variabilis (strain ATCC 29413 / PCC 7937) (Anabaena variabilis).
OC   Bacteria; Cyanobacteria; Nostocales; Nostocaceae; Trichormus.
OX   NCBI_TaxID=240292;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=8709854; DOI=10.1111/j.1365-2958.1995.mmi_18020357.x;
RA   Schrautemeier B., Neveling U., Schmitz S.;
RT   "Distinct and differently regulated Mo-dependent nitrogen-fixing systems
RT   evolved for heterocysts and vegetative cells of Anabaena variabilis ATCC
RT   29413: characterization of the fdxH1/2 gene regions as part of the nif1/2
RT   gene clusters.";
RL   Mol. Microbiol. 18:357-369(1995).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 29413 / PCC 7937;
RX   PubMed=25197444; DOI=10.4056/sigs.3899418;
RA   Thiel T., Pratte B.S., Zhong J., Goodwin L., Copeland A., Lucas S., Han C.,
RA   Pitluck S., Land M.L., Kyrpides N.C., Woyke T.;
RT   "Complete genome sequence of Anabaena variabilis ATCC 29413.";
RL   Stand. Genomic Sci. 9:562-573(2014).
CC   -!- FUNCTION: Ferredoxins are iron-sulfur proteins that transfer electrons
CC       in a wide variety of metabolic reactions.
CC   -!- COFACTOR:
CC       Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883; Evidence={ECO:0000250};
CC       Note=Binds 2 [4Fe-4S] clusters. {ECO:0000250};
CC   -!- SUBUNIT: Homodimer. {ECO:0000250}.
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DR   EMBL; Z46890; CAA86992.1; -; Genomic_DNA.
DR   EMBL; CP000117; ABA23858.1; -; Genomic_DNA.
DR   PIR; S70250; S70250.
DR   AlphaFoldDB; P46050; -.
DR   SMR; P46050; -.
DR   STRING; 240292.Ava_4259; -.
DR   EnsemblBacteria; ABA23858; ABA23858; Ava_4259.
DR   KEGG; ava:Ava_4259; -.
DR   eggNOG; COG1145; Bacteria.
DR   HOGENOM; CLU_155272_0_0_3; -.
DR   OMA; EYCIGCQ; -.
DR   Proteomes; UP000002533; Chromosome.
DR   GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0009399; P:nitrogen fixation; IEA:UniProtKB-KW.
DR   InterPro; IPR017896; 4Fe4S_Fe-S-bd.
DR   InterPro; IPR017900; 4Fe4S_Fe_S_CS.
DR   InterPro; IPR014283; FdIII_4_nif.
DR   Pfam; PF12838; Fer4_7; 1.
DR   TIGRFAMs; TIGR02936; fdxN_nitrog; 1.
DR   PROSITE; PS00198; 4FE4S_FER_1; 2.
DR   PROSITE; PS51379; 4FE4S_FER_2; 2.
PE   3: Inferred from homology;
KW   4Fe-4S; Electron transport; Iron; Iron-sulfur; Metal-binding;
KW   Nitrogen fixation; Repeat; Transport.
FT   CHAIN           1..98
FT                   /note="Ferredoxin-3"
FT                   /id="PRO_0000159186"
FT   DOMAIN          18..47
FT                   /note="4Fe-4S ferredoxin-type 1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00711"
FT   DOMAIN          66..95
FT                   /note="4Fe-4S ferredoxin-type 2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00711"
FT   BINDING         27
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250"
FT   BINDING         30
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250"
FT   BINDING         33
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250"
FT   BINDING         37
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_label="1"
FT                   /evidence="ECO:0000250"
FT   BINDING         75
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
FT   BINDING         78
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
FT   BINDING         81
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
FT   BINDING         85
FT                   /ligand="[4Fe-4S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:49883"
FT                   /ligand_label="2"
FT                   /evidence="ECO:0000250"
SQ   SEQUENCE   98 AA;  10866 MW;  268AF7E0CD735AA9 CRC64;
     MATLTGLTFG GQVWTPQFVE AVNQDKCIGC GRCFKACGRN VLILQALNEN GEFVEDEEGE
     EIERKVMSII HPEYCIGCQA CARACPKNCY THSPLEHN