ID   B8CCT7_THAPS            Unreviewed;       637 AA.
AC   B8CCT7;
DT   03-MAR-2009, integrated into UniProtKB/TrEMBL.
DT   03-MAR-2009, sequence version 1.
DT   27-MAR-2024, entry version 79.
DE   RecName: Full=Succinate dehydrogenase [ubiquinone] flavoprotein subunit, mitochondrial {ECO:0000256|RuleBase:RU362051};
DE            EC=1.3.5.1 {ECO:0000256|RuleBase:RU362051};
GN   ORFNames=THAPSDRAFT_42475 {ECO:0000313|EMBL:EED89006.1};
OS   Thalassiosira pseudonana (Marine diatom) (Cyclotella nana).
OC   Eukaryota; Sar; Stramenopiles; Ochrophyta; Bacillariophyta;
OC   Coscinodiscophyceae; Thalassiosirophycidae; Thalassiosirales;
OC   Thalassiosiraceae; Thalassiosira.
OX   NCBI_TaxID=35128 {ECO:0000313|EMBL:EED89006.1, ECO:0000313|Proteomes:UP000001449};
RN   [1] {ECO:0000313|EMBL:EED89006.1, ECO:0000313|Proteomes:UP000001449}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCMP1335 {ECO:0000313|EMBL:EED89006.1};
RX   PubMed=15459382; DOI=10.1126/science.1101156;
RA   Armbrust E.V., Berges J.A., Bowler C., Green B.R., Martinez D.,
RA   Putnam N.H., Zhou S., Allen A.E., Apt K.E., Bechner M., Brzezinski M.A.,
RA   Chaal B.K., Chiovitti A., Davis A.K., Demarest M.S., Detter J.C.,
RA   Glavina T., Goodstein D., Hadi M.Z., Hellsten U., Hildebrand M.,
RA   Jenkins B.D., Jurka J., Kapitonov V.V., Kroger N., Lau W.W., Lane T.W.,
RA   Larimer F.W., Lippmeier J.C., Lucas S., Medina M., Montsant A., Obornik M.,
RA   Parker M.S., Palenik B., Pazour G.J., Richardson P.M., Rynearson T.A.,
RA   Saito M.A., Schwartz D.C., Thamatrakoln K., Valentin K., Vardi A.,
RA   Wilkerson F.P., Rokhsar D.S.;
RT   "The genome of the diatom Thalassiosira pseudonana: ecology, evolution, and
RT   metabolism.";
RL   Science 306:79-86(2004).
RN   [2] {ECO:0000313|EMBL:EED89006.1, ECO:0000313|Proteomes:UP000001449}
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CCMP1335 {ECO:0000313|EMBL:EED89006.1};
RX   PubMed=18923393; DOI=10.1038/nature07410;
RA   Bowler C., Allen A.E., Badger J.H., Grimwood J., Jabbari K., Kuo A.,
RA   Maheswari U., Martens C., Maumus F., Otillar R.P., Rayko E., Salamov A.,
RA   Vandepoele K., Beszteri B., Gruber A., Heijde M., Katinka M., Mock T.,
RA   Valentin K., Verret F., Berges J.A., Brownlee C., Cadoret J.P.,
RA   Chiovitti A., Choi C.J., Coesel S., De Martino A., Detter J.C., Durkin C.,
RA   Falciatore A., Fournet J., Haruta M., Huysman M.J., Jenkins B.D.,
RA   Jiroutova K., Jorgensen R.E., Joubert Y., Kaplan A., Kroger N., Kroth P.G.,
RA   La Roche J., Lindquist E., Lommer M., Martin-Jezequel V., Lopez P.J.,
RA   Lucas S., Mangogna M., McGinnis K., Medlin L.K., Montsant A.,
RA   Oudot-Le Secq M.P., Napoli C., Obornik M., Parker M.S., Petit J.L.,
RA   Porcel B.M., Poulsen N., Robison M., Rychlewski L., Rynearson T.A.,
RA   Schmutz J., Shapiro H., Siaut M., Stanley M., Sussman M.R., Taylor A.R.,
RA   Vardi A., von Dassow P., Vyverman W., Willis A., Wyrwicz L.S.,
RA   Rokhsar D.S., Weissenbach J., Armbrust E.V., Green B.R., Van de Peer Y.,
RA   Grigoriev I.V.;
RT   "The Phaeodactylum genome reveals the evolutionary history of diatom
RT   genomes.";
RL   Nature 456:239-244(2008).
CC   -!- FUNCTION: Flavoprotein (FP) subunit of succinate dehydrogenase (SDH)
CC       that is involved in complex II of the mitochondrial electron transport
CC       chain and is responsible for transferring electrons from succinate to
CC       ubiquinone (coenzyme Q). {ECO:0000256|RuleBase:RU362051}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a quinone + succinate = a quinol + fumarate;
CC         Xref=Rhea:RHEA:40523, ChEBI:CHEBI:24646, ChEBI:CHEBI:29806,
CC         ChEBI:CHEBI:30031, ChEBI:CHEBI:132124; EC=1.3.5.1;
CC         Evidence={ECO:0000256|RuleBase:RU362051};
CC   -!- COFACTOR:
CC       Name=FAD; Xref=ChEBI:CHEBI:57692;
CC         Evidence={ECO:0000256|ARBA:ARBA00001974,
CC         ECO:0000256|PIRSR:PIRSR630664-51, ECO:0000256|RuleBase:RU362051};
CC   -!- PATHWAY: Carbohydrate metabolism; tricarboxylic acid cycle; fumarate
CC       from succinate (eukaryal route): step 1/1.
CC       {ECO:0000256|RuleBase:RU362051}.
CC   -!- SUBCELLULAR LOCATION: Mitochondrion inner membrane
CC       {ECO:0000256|RuleBase:RU362051}; Peripheral membrane protein
CC       {ECO:0000256|RuleBase:RU362051}; Matrix side
CC       {ECO:0000256|RuleBase:RU362051}.
CC   -!- SIMILARITY: Belongs to the FAD-dependent oxidoreductase 2 family.
CC       FRD/SDH subfamily. {ECO:0000256|ARBA:ARBA00008040,
CC       ECO:0000256|RuleBase:RU362051}.
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DR   EMBL; CM000649; EED89006.1; -; Genomic_DNA.
DR   RefSeq; XP_002293997.1; XM_002293961.1.
DR   AlphaFoldDB; B8CCT7; -.
DR   STRING; 35128.B8CCT7; -.
DR   PaxDb; 35128-Thaps42475; -.
DR   EnsemblProtists; EED89006; EED89006; THAPSDRAFT_42475.
DR   GeneID; 7441832; -.
DR   KEGG; tps:THAPSDRAFT_42475; -.
DR   eggNOG; KOG2403; Eukaryota.
DR   HOGENOM; CLU_014312_6_1_1; -.
DR   InParanoid; B8CCT7; -.
DR   OMA; FHPTGIW; -.
DR   UniPathway; UPA00223; UER01006.
DR   Proteomes; UP000001449; Chromosome 14.
DR   GO; GO:0005749; C:mitochondrial respiratory chain complex II, succinate dehydrogenase complex (ubiquinone); IBA:GO_Central.
DR   GO; GO:0009055; F:electron transfer activity; IBA:GO_Central.
DR   GO; GO:0050660; F:flavin adenine dinucleotide binding; IBA:GO_Central.
DR   GO; GO:0102040; F:fumarate reductase (menaquinone); IEA:UniProtKB-EC.
DR   GO; GO:0008177; F:succinate dehydrogenase (ubiquinone) activity; IBA:GO_Central.
DR   GO; GO:0006121; P:mitochondrial electron transport, succinate to ubiquinone; IBA:GO_Central.
DR   GO; GO:0006099; P:tricarboxylic acid cycle; IEA:UniProtKB-UniPathway.
DR   Gene3D; 3.50.50.60; FAD/NAD(P)-binding domain; 1.
DR   Gene3D; 1.20.58.100; Fumarate reductase/succinate dehydrogenase flavoprotein-like, C-terminal domain; 1.
DR   Gene3D; 4.10.80.40; succinate dehydrogenase protein domain; 1.
DR   Gene3D; 3.90.700.10; Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain; 1.
DR   InterPro; IPR003953; FAD-binding_2.
DR   InterPro; IPR036188; FAD/NAD-bd_sf.
DR   InterPro; IPR003952; FRD_SDH_FAD_BS.
DR   InterPro; IPR037099; Fum_R/Succ_DH_flav-like_C_sf.
DR   InterPro; IPR015939; Fum_Rdtase/Succ_DH_flav-like_C.
DR   InterPro; IPR030664; SdhA/FrdA/AprA.
DR   InterPro; IPR027477; Succ_DH/fumarate_Rdtase_cat_sf.
DR   InterPro; IPR011281; Succ_DH_flav_su_fwd.
DR   InterPro; IPR014006; Succ_Dhase_FrdA_Gneg.
DR   NCBIfam; TIGR01816; sdhA_forward; 1.
DR   NCBIfam; TIGR01812; sdhA_frdA_Gneg; 1.
DR   PANTHER; PTHR11632; SUCCINATE DEHYDROGENASE 2 FLAVOPROTEIN SUBUNIT; 1.
DR   PANTHER; PTHR11632:SF51; SUCCINATE DEHYDROGENASE [UBIQUINONE] FLAVOPROTEIN SUBUNIT, MITOCHONDRIAL; 1.
DR   Pfam; PF00890; FAD_binding_2; 1.
DR   Pfam; PF02910; Succ_DH_flav_C; 1.
DR   PIRSF; PIRSF000171; SDHA_APRA_LASPO; 1.
DR   SUPFAM; SSF51905; FAD/NAD(P)-binding domain; 1.
DR   SUPFAM; SSF46977; Succinate dehydrogenase/fumarate reductase flavoprotein C-terminal domain; 1.
DR   SUPFAM; SSF56425; Succinate dehydrogenase/fumarate reductase flavoprotein, catalytic domain; 1.
DR   PROSITE; PS00504; FRD_SDH_FAD_BINDING; 1.
PE   3: Inferred from homology;
KW   Electron transport {ECO:0000256|ARBA:ARBA00022982,
KW   ECO:0000256|RuleBase:RU362051};
KW   FAD {ECO:0000256|ARBA:ARBA00022827, ECO:0000256|PIRSR:PIRSR611281-4};
KW   Flavoprotein {ECO:0000256|ARBA:ARBA00022630, ECO:0000256|PIRSR:PIRSR630664-
KW   51};
KW   Membrane {ECO:0000256|ARBA:ARBA00023136, ECO:0000256|RuleBase:RU362051};
KW   Oxidoreductase {ECO:0000256|ARBA:ARBA00023002,
KW   ECO:0000256|RuleBase:RU362051};
KW   Reference proteome {ECO:0000313|Proteomes:UP000001449};
KW   Transit peptide {ECO:0000256|RuleBase:RU362051};
KW   Transport {ECO:0000256|ARBA:ARBA00022448, ECO:0000256|RuleBase:RU362051};
KW   Tricarboxylic acid cycle {ECO:0000256|RuleBase:RU362051}.
FT   DOMAIN          46..447
FT                   /note="FAD-dependent oxidoreductase 2 FAD binding"
FT                   /evidence="ECO:0000259|Pfam:PF00890"
FT   DOMAIN          502..637
FT                   /note="Fumarate reductase/succinate dehydrogenase
FT                   flavoprotein-like C-terminal"
FT                   /evidence="ECO:0000259|Pfam:PF02910"
FT   REGION          8..30
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        12..30
FT                   /note="Polar residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        324
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR000171-1"
FT   BINDING         51..56
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   BINDING         74..89
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   BINDING         259
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   BINDING         280
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   BINDING         292
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   BINDING         391
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   BINDING         430
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   BINDING         441
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   BINDING         446..447
FT                   /ligand="FAD"
FT                   /ligand_id="ChEBI:CHEBI:57692"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR630664-51"
FT   MOD_RES         82
FT                   /note="Tele-8alpha-FAD histidine"
FT                   /evidence="ECO:0000256|PIRSR:PIRSR611281-4"
SQ   SEQUENCE   637 AA;  68963 MW;  3682775D4F77C653 CRC64;
     MLSAFARRAS SKATKLASTA PTPTTAVRSL STSTTGDYTI VDHTYDALVI GAGGSGLRAA
     MGLSEAGFKT ACVSKLFPTR SHTVAAQGGI NAALGNMGPD DWRWHMYDTV KGSDWLGDQD
     AIHYMCREAP KAVLELEEFG LPFSRTEEGK IYQRAFGGQS LDFGKGGQAH RCCAAADRTG
     HAMLHTLYGR SLAFDTTYFI EYFAMDLLMT PDGQCVGAMA LNMEDGTLHR IKAKNTVLAT
     GGYGRTYFSC TSAHTCTGDG NAMAMRAGLA NQDAEFVQFH PTGIYGAGCL ITEGCRGEGG
     ILRNSEGERF MERYAPSAKD LASRDVVSRA MTMEIREGRG VGPKKDHCYL HLDHLPAELL
     AERLPGISET AAIFAGVDVT KEPIPVLPTV HYNMGGIPTN HLGEVIRTDF NADGSFNSDV
     VVPGLFAAGE AACASVHGAN RLGANSLLDI VVFGRACANR IAEIAKPGDA IADAPADVGM
     DSVAELDKLR FATGSTPTSV IRGEMQHLMQ DKAAVYRTEE LLAEGKKEID EVVQSFNDVH
     VTDKSLIWNT DLVETLELRN LLGCAATTMH SAENRKESRG AHAHENYPDR LDDEWMKHTL
     AYFDEKEGKT KIGYRPIHYY TLDEEECKTV PPVARVY
//