ID   CYBH_AZOCH              Reviewed;         240 AA.
AC   Q43953;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1997, sequence version 1.
DT   25-MAY-2022, entry version 75.
DE   RecName: Full=Probable Ni/Fe-hydrogenase B-type cytochrome subunit;
GN   Name=hupZ;
OS   Azotobacter chroococcum mcd 1.
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Pseudomonadales;
OC   Pseudomonadaceae; Azotobacter.
OX   NCBI_TaxID=355;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RX   PubMed=7966281; DOI=10.1016/0022-2836(94)90029-9;
RA   Du L., Tibelius K.H., Souza E.M., Garg R.P., Yates M.G.;
RT   "Sequences, organization and analysis of the hupZMNOQRTV genes from the
RT   Azotobacter chroococcum hydrogenase gene cluster.";
RL   J. Mol. Biol. 243:549-557(1994).
CC   -!- FUNCTION: Probable b-type cytochrome.
CC   -!- SUBCELLULAR LOCATION: Cell membrane; Multi-pass membrane protein.
CC   -!- SIMILARITY: Belongs to the HupC/HyaC/HydC family. {ECO:0000305}.
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DR   EMBL; L25315; AAA64447.1; -; Genomic_DNA.
DR   PIR; S53656; S53656.
DR   AlphaFoldDB; Q43953; -.
DR   SMR; Q43953; -.
DR   GO; GO:0016021; C:integral component of membrane; IEA:UniProtKB-KW.
DR   GO; GO:0005886; C:plasma membrane; IEA:UniProtKB-SubCell.
DR   GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR   GO; GO:0005506; F:iron ion binding; IEA:InterPro.
DR   GO; GO:0022904; P:respiratory electron transport chain; IEA:InterPro.
DR   InterPro; IPR011577; Cyt_b561_bac/Ni-Hgenase.
DR   InterPro; IPR016174; Di-haem_cyt_TM.
DR   InterPro; IPR000516; Ni-dep_Hydgase_cyt-B.
DR   Pfam; PF01292; Ni_hydr_CYTB; 1.
DR   PRINTS; PR00161; NIHGNASECYTB.
DR   SUPFAM; SSF81342; SSF81342; 1.
DR   TIGRFAMs; TIGR02125; CytB-hydogenase; 1.
DR   PROSITE; PS00882; NI_HGENASE_CYTB_1; 1.
DR   PROSITE; PS00883; NI_HGENASE_CYTB_2; 1.
PE   3: Inferred from homology;
KW   Cell membrane; Electron transport; Heme; Iron; Membrane; Metal-binding;
KW   Transmembrane; Transmembrane helix; Transport.
FT   CHAIN           1..240
FT                   /note="Probable Ni/Fe-hydrogenase B-type cytochrome
FT                   subunit"
FT                   /id="PRO_0000201379"
FT   TRANSMEM        31..51
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        75..95
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        142..163
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
FT   TRANSMEM        196..213
FT                   /note="Helical"
FT                   /evidence="ECO:0000255"
SQ   SEQUENCE   240 AA;  27649 MW;  27016B196FF381FD CRC64;
     MALEKSLETG DGQEKVRKQT AVYVYEAPLR LWHWVTALSI VVLGVTGYFI GAPLPTMPGE
     AMDNYLMGYI RFAHFAAGYV LAIGFLGRVY WAFVGNHHAR ELFLVPVHRK AWWKELWHEV
     RWYLFLEKVP KKYIGHNPLG QLAMFCFFVI GAVFMSVTGF ALYAEGLGQG SWADRLFGWV
     IPLFGQSQDV HTWHHLGMWY LVVFVMIHVY LAAREDIVSR QSLISTMVGG WRMFKDDRPD