ID   FERH_TRIV2              Reviewed;          99 AA.
AC   P46046; Q3M641;
DT   01-NOV-1995, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 2.
DT   03-AUG-2022, entry version 124.
DE   RecName: Full=Ferredoxin, heterocyst;
GN   Name=fdxH1; OrderedLocusNames=Ava_3940;
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. Donates electrons to the
CC       nitrogenase 1.
CC   -!- COFACTOR:
CC       Name=[2Fe-2S] cluster; Xref=ChEBI:CHEBI:190135;
CC       Note=Binds 1 [2Fe-2S] cluster.;
CC   -!- DEVELOPMENTAL STAGE: Expressed exclusively within heterocysts.
CC   -!- SIMILARITY: Belongs to the 2Fe2S plant-type ferredoxin family.
CC       {ECO:0000305}.
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DR   EMBL; Z46887; CAA86986.1; -; Genomic_DNA.
DR   EMBL; CP000117; ABA23545.1; -; Genomic_DNA.
DR   PIR; S49989; S49989.
DR   AlphaFoldDB; P46046; -.
DR   SMR; P46046; -.
DR   STRING; 240292.Ava_3940; -.
DR   EnsemblBacteria; ABA23545; ABA23545; Ava_3940.
DR   KEGG; ava:Ava_3940; -.
DR   eggNOG; COG1018; Bacteria.
DR   HOGENOM; CLU_082632_7_3_3; -.
DR   OMA; AYPRSNC; -.
DR   Proteomes; UP000002533; Chromosome.
DR   GO; GO:0051537; F:2 iron, 2 sulfur cluster binding; IEA:UniProtKB-KW.
DR   GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0043158; P:heterocyst differentiation; IEA:UniProtKB-KW.
DR   GO; GO:0009399; P:nitrogen fixation; IEA:UniProtKB-KW.
DR   CDD; cd00207; fer2; 1.
DR   Gene3D; 3.10.20.30; -; 1.
DR   InterPro; IPR036010; 2Fe-2S_ferredoxin-like_sf.
DR   InterPro; IPR001041; 2Fe-2S_ferredoxin-type.
DR   InterPro; IPR006058; 2Fe2S_fd_BS.
DR   InterPro; IPR012675; Beta-grasp_dom_sf.
DR   InterPro; IPR010241; Fd_pln.
DR   Pfam; PF00111; Fer2; 1.
DR   SUPFAM; SSF54292; SSF54292; 1.
DR   TIGRFAMs; TIGR02008; fdx_plant; 1.
DR   PROSITE; PS00197; 2FE2S_FER_1; 1.
DR   PROSITE; PS51085; 2FE2S_FER_2; 1.
PE   2: Evidence at transcript level;
KW   2Fe-2S; Electron transport; Heterocyst; Iron; Iron-sulfur; Metal-binding;
KW   Nitrogen fixation; Transport.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..99
FT                   /note="Ferredoxin, heterocyst"
FT                   /id="PRO_0000189303"
FT   DOMAIN          4..96
FT                   /note="2Fe-2S ferredoxin-type"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00465"
FT   BINDING         42
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00465"
FT   BINDING         47
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00465"
FT   BINDING         50
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00465"
FT   BINDING         80
FT                   /ligand="[2Fe-2S] cluster"
FT                   /ligand_id="ChEBI:CHEBI:190135"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU00465"
SQ   SEQUENCE   99 AA;  10904 MW;  A5DC9DDA32057E13 CRC64;
     MATYQVRLIS KKENIDTTIE IDEETTILDG AEENGIELPF SCHSGSCSSC VGKVVEGEVD
     QSDQIFLDDE QVGKGFALLC VTYPRSNCTI KTHQEPYLA