ID   HC3S_ACIFR              Reviewed;          40 AA.
AC   P80510;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-1996, sequence version 1.
DT   23-FEB-2022, entry version 52.
DE   RecName: Full=Cytochrome c3 hydrogenase small chain;
DE            Short=Hydrogenase;
DE            EC=1.12.2.1;
DE   Flags: Fragment;
GN   Name=hoxK;
OS   Acidithiobacillus ferrooxidans (Thiobacillus ferrooxidans).
OC   Bacteria; Proteobacteria; Acidithiobacillia; Acidithiobacillales;
OC   Acidithiobacillaceae; Acidithiobacillus.
OX   NCBI_TaxID=920;
RN   [1]
RP   PROTEIN SEQUENCE.
RC   STRAIN=ATCC 19859 / BCRC 13033 / JCM 3863 / NCIMB 9490;
RX   PubMed=8661919; DOI=10.1007/s002030050329;
RA   Fischer J., Quentmeier A., Kostka S., Kraft R., Friedrich C.G.;
RT   "Purification and characterization of the hydrogenase from Thiobacillus
RT   ferrooxidans.";
RL   Arch. Microbiol. 165:289-296(1996).
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2 Fe(III)-[cytochrome c3] + H2 = 2 Fe(II)-[cytochrome c3] + 2
CC         H(+); Xref=Rhea:RHEA:20625, Rhea:RHEA-COMP:11576, Rhea:RHEA-
CC         COMP:11577, ChEBI:CHEBI:15378, ChEBI:CHEBI:18276, ChEBI:CHEBI:29033,
CC         ChEBI:CHEBI:29034; EC=1.12.2.1;
CC   -!- COFACTOR:
CC       Name=Fe cation; Xref=ChEBI:CHEBI:24875;
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DR   STRING; 380394.Lferr_0849; -.
DR   GO; GO:0047806; F:cytochrome-c3 hydrogenase activity; IEA:UniProtKB-EC.
DR   Gene3D; 3.40.50.700; -; 1.
DR   InterPro; IPR037024; NiFe_Hase_small_N_sf.
PE   1: Evidence at protein level;
KW   Direct protein sequencing; Iron; Oxidoreductase.
FT   CHAIN           1..>40
FT                   /note="Cytochrome c3 hydrogenase small chain"
FT                   /id="PRO_0000083914"
FT   NON_TER         40
SQ   SEQUENCE   40 AA;  4214 MW;  A99A38B74F92C78C CRC64;
     ANVLWLQGGA XSGNTMSFLN AEEPSAXDLV TDFGINVLXQ