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Database: UniProt
Entry: Q21IV9_SACD2
LinkDB: Q21IV9_SACD2
Original site: Q21IV9_SACD2 
ID   Q21IV9_SACD2            Unreviewed;       124 AA.
AC   Q21IV9;
DT   18-APR-2006, integrated into UniProtKB/TrEMBL.
DT   18-APR-2006, sequence version 1.
DT   24-JAN-2024, entry version 89.
DE   RecName: Full=Succinate dehydrogenase cytochrome b556 subunit {ECO:0000256|ARBA:ARBA00020076};
GN   OrderedLocusNames=Sde_2110 {ECO:0000313|EMBL:ABD81370.1};
OS   Saccharophagus degradans (strain 2-40 / ATCC 43961 / DSM 17024).
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Cellvibrionales;
OC   Cellvibrionaceae; Saccharophagus.
OX   NCBI_TaxID=203122 {ECO:0000313|EMBL:ABD81370.1, ECO:0000313|Proteomes:UP000001947};
RN   [1] {ECO:0000313|EMBL:ABD81370.1, ECO:0000313|Proteomes:UP000001947}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=2-40 / ATCC 43961 / DSM 17024
RC   {ECO:0000313|Proteomes:UP000001947};
RX   PubMed=18516288; DOI=10.1371/journal.pgen.1000087;
RA   Weiner R.M., Taylor L.E.II., Henrissat B., Hauser L., Land M.,
RA   Coutinho P.M., Rancurel C., Saunders E.H., Longmire A.G., Zhang H.,
RA   Bayer E.A., Gilbert H.J., Larimer F., Zhulin I.B., Ekborg N.A., Lamed R.,
RA   Richardson P.M., Borovok I., Hutcheson S.;
RT   "Complete genome sequence of the complex carbohydrate-degrading marine
RT   bacterium, Saccharophagus degradans strain 2-40 T.";
RL   PLoS Genet. 4:E1000087-E1000087(2008).
CC   -!- FUNCTION: Membrane-anchoring subunit of succinate dehydrogenase (SDH).
CC       {ECO:0000256|ARBA:ARBA00004050}.
CC   -!- COFACTOR:
CC       Name=heme; Xref=ChEBI:CHEBI:30413;
CC         Evidence={ECO:0000256|PIRSR:PIRSR000178-1};
CC       Note=The heme is bound between the two transmembrane subunits.
CC       {ECO:0000256|PIRSR:PIRSR000178-1};
CC   -!- SUBUNIT: Part of an enzyme complex containing four subunits: a
CC       flavoprotein, an iron-sulfur protein, plus two membrane-anchoring
CC       proteins, SdhC and SdhD. The complex can form homotrimers.
CC       {ECO:0000256|ARBA:ARBA00025912}.
CC   -!- SUBCELLULAR LOCATION: Membrane {ECO:0000256|ARBA:ARBA00004141}; Multi-
CC       pass membrane protein {ECO:0000256|ARBA:ARBA00004141}.
CC   -!- SIMILARITY: Belongs to the cytochrome b560 family.
CC       {ECO:0000256|ARBA:ARBA00007244}.
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DR   EMBL; CP000282; ABD81370.1; -; Genomic_DNA.
DR   RefSeq; WP_011468588.1; NC_007912.1.
DR   AlphaFoldDB; Q21IV9; -.
DR   STRING; 203122.Sde_2110; -.
DR   KEGG; sde:Sde_2110; -.
DR   eggNOG; COG2009; Bacteria.
DR   HOGENOM; CLU_094691_2_1_6; -.
DR   OMA; YHLVAGI; -.
DR   Proteomes; UP000001947; Chromosome.
DR   GO; GO:0045281; C:succinate dehydrogenase complex; IEA:InterPro.
DR   GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0000104; F:succinate dehydrogenase activity; IEA:InterPro.
DR   GO; GO:0006099; P:tricarboxylic acid cycle; IEA:InterPro.
DR   CDD; cd03499; SQR_TypeC_SdhC; 1.
DR   Gene3D; 1.20.1300.10; Fumarate reductase/succinate dehydrogenase, transmembrane subunit; 1.
DR   InterPro; IPR034804; SQR/QFR_C/D.
DR   InterPro; IPR018495; Succ_DH_cyt_bsu_CS.
DR   InterPro; IPR014314; Succ_DH_cytb556.
DR   InterPro; IPR000701; SuccDH_FuR_B_TM-su.
DR   NCBIfam; TIGR02970; succ_dehyd_cytB; 1.
DR   PANTHER; PTHR10978; SUCCINATE DEHYDROGENASE CYTOCHROME B560 SUBUNIT; 1.
DR   PANTHER; PTHR10978:SF5; SUCCINATE DEHYDROGENASE CYTOCHROME B560 SUBUNIT, MITOCHONDRIAL; 1.
DR   Pfam; PF01127; Sdh_cyt; 1.
DR   PIRSF; PIRSF000178; SDH_cyt_b560; 1.
DR   SUPFAM; SSF81343; Fumarate reductase respiratory complex transmembrane subunits; 1.
DR   PROSITE; PS01000; SDH_CYT_1; 1.
DR   PROSITE; PS01001; SDH_CYT_2; 1.
PE   3: Inferred from homology;
KW   Heme {ECO:0000256|ARBA:ARBA00022617, ECO:0000256|PIRSR:PIRSR000178-1};
KW   Iron {ECO:0000256|ARBA:ARBA00023004, ECO:0000256|PIRSR:PIRSR000178-1};
KW   Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|SAM:Phobius};
KW   Metal-binding {ECO:0000256|ARBA:ARBA00022723,
KW   ECO:0000256|PIRSR:PIRSR000178-1};
KW   Oxidoreductase {ECO:0000313|EMBL:ABD81370.1};
KW   Reference proteome {ECO:0000313|Proteomes:UP000001947};
KW   Transmembrane {ECO:0000256|ARBA:ARBA00022692, ECO:0000256|SAM:Phobius};
KW   Transmembrane helix {ECO:0000256|ARBA:ARBA00022989,
KW   ECO:0000256|SAM:Phobius}.
FT   TRANSMEM        21..44
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        64..82
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   TRANSMEM        103..123
FT                   /note="Helical"
FT                   /evidence="ECO:0000256|SAM:Phobius"
FT   BINDING         80
FT                   /ligand="heme"
FT                   /ligand_id="ChEBI:CHEBI:30413"
FT                   /ligand_note="ligand shared with second transmembrane
FT                   subunit"
FT                   /ligand_part="Fe"
FT                   /ligand_part_id="ChEBI:CHEBI:18248"
FT                   /note="axial binding residue"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR000178-1"
SQ   SEQUENCE   124 AA;  13323 MW;  A54F4DE48540AE6E CRC64;
     MNKNRPVNLD ISTMRLPITA LVSITHRVTG VVLLAGILGL IWMLDLSLAS EESFNQLKDC
     LAQPFVKIAL IAVLAALAYH LVAGVRHLIM DLGIGESKEG GKLGAKIAVA LSVVLIVLMG
     IWVW
//
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