ID   ODO2_BUCAP              Reviewed;         393 AA.
AC   Q8K9N2;
DT   15-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2002, sequence version 1.
DT   03-AUG-2022, entry version 114.
DE   RecName: Full=Dihydrolipoyllysine-residue succinyltransferase component of 2-oxoglutarate dehydrogenase complex;
DE            EC=2.3.1.61 {ECO:0000250|UniProtKB:P0AFG6};
DE   AltName: Full=2-oxoglutarate dehydrogenase complex component E2;
DE            Short=OGDC-E2;
DE   AltName: Full=Dihydrolipoamide succinyltransferase component of 2-oxoglutarate dehydrogenase complex;
GN   Name=sucB; OrderedLocusNames=BUsg_293;
OS   Buchnera aphidicola subsp. Schizaphis graminum (strain Sg).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Erwiniaceae; Buchnera.
OX   NCBI_TaxID=198804;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Sg;
RX   PubMed=12089438; DOI=10.1126/science.1071278;
RA   Tamas I., Klasson L., Canbaeck B., Naeslund A.K., Eriksson A.-S.,
RA   Wernegreen J.J., Sandstroem J.P., Moran N.A., Andersson S.G.E.;
RT   "50 million years of genomic stasis in endosymbiotic bacteria.";
RL   Science 296:2376-2379(2002).
CC   -!- FUNCTION: E2 component of the 2-oxoglutarate dehydrogenase (OGDH)
CC       complex which catalyzes the second step in the conversion of 2-
CC       oxoglutarate to succinyl-CoA and CO(2). {ECO:0000250|UniProtKB:P0AFG6}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=(R)-N(6)-dihydrolipoyl-L-lysyl-[2-oxoglutarate dehydrogenase
CC         complex component E2] + succinyl-CoA = (R)-N(6)-(S(8)-
CC         succinyldihydrolipoyl)-L-lysyl-[2-oxoglutarate dehydrogenase complex
CC         component E2] + CoA; Xref=Rhea:RHEA:15213, Rhea:RHEA-COMP:10581,
CC         Rhea:RHEA-COMP:10582, ChEBI:CHEBI:57287, ChEBI:CHEBI:57292,
CC         ChEBI:CHEBI:83100, ChEBI:CHEBI:83120; EC=2.3.1.61;
CC         Evidence={ECO:0000250|UniProtKB:P0AFG6};
CC   -!- COFACTOR:
CC       Name=(R)-lipoate; Xref=ChEBI:CHEBI:83088; Evidence={ECO:0000250};
CC       Note=Binds 1 lipoyl cofactor covalently. {ECO:0000250};
CC   -!- PATHWAY: Amino-acid degradation; L-lysine degradation via saccharopine
CC       pathway; glutaryl-CoA from L-lysine: step 6/6.
CC   -!- SUBUNIT: Forms a 24-polypeptide structural core with octahedral
CC       symmetry. Part of the 2-oxoglutarate dehydrogenase (OGDH) complex
CC       composed of E1 (2-oxoglutarate dehydrogenase), E2 (dihydrolipoamide
CC       succinyltransferase) and E3 (dihydrolipoamide dehydrogenase); the
CC       complex contains multiple copies of the three enzymatic components (E1,
CC       E2 and E3). {ECO:0000250|UniProtKB:P0AFG6}.
CC   -!- SIMILARITY: Belongs to the 2-oxoacid dehydrogenase family.
CC       {ECO:0000305}.
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DR   EMBL; AE013218; AAM67848.1; -; Genomic_DNA.
DR   RefSeq; WP_011053815.1; NC_004061.1.
DR   AlphaFoldDB; Q8K9N2; -.
DR   SMR; Q8K9N2; -.
DR   STRING; 198804.BUsg_293; -.
DR   PRIDE; Q8K9N2; -.
DR   EnsemblBacteria; AAM67848; AAM67848; BUsg_293.
DR   KEGG; bas:BUsg_293; -.
DR   eggNOG; COG0508; Bacteria.
DR   HOGENOM; CLU_016733_0_0_6; -.
DR   OMA; MKVPSPG; -.
DR   OrthoDB; 1626282at2; -.
DR   UniPathway; UPA00868; UER00840.
DR   Proteomes; UP000000416; Chromosome.
DR   GO; GO:0045252; C:oxoglutarate dehydrogenase complex; IEA:InterPro.
DR   GO; GO:0004149; F:dihydrolipoyllysine-residue succinyltransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0033512; P:L-lysine catabolic process to acetyl-CoA via saccharopine; IEA:UniProtKB-UniPathway.
DR   GO; GO:0006099; P:tricarboxylic acid cycle; IEA:UniProtKB-KW.
DR   Gene3D; 3.30.559.10; -; 1.
DR   InterPro; IPR001078; 2-oxoacid_DH_actylTfrase.
DR   InterPro; IPR000089; Biotin_lipoyl.
DR   InterPro; IPR023213; CAT-like_dom_sf.
DR   InterPro; IPR011053; Single_hybrid_motif.
DR   InterPro; IPR006255; SucB.
DR   Pfam; PF00198; 2-oxoacid_dh; 1.
DR   Pfam; PF00364; Biotin_lipoyl; 1.
DR   SUPFAM; SSF51230; SSF51230; 1.
DR   TIGRFAMs; TIGR01347; sucB; 1.
DR   PROSITE; PS50968; BIOTINYL_LIPOYL; 1.
PE   3: Inferred from homology;
KW   Acyltransferase; Lipoyl; Transferase; Tricarboxylic acid cycle.
FT   CHAIN           1..393
FT                   /note="Dihydrolipoyllysine-residue succinyltransferase
FT                   component of 2-oxoglutarate dehydrogenase complex"
FT                   /id="PRO_0000162260"
FT   DOMAIN          3..78
FT                   /note="Lipoyl-binding"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01066"
FT   ACT_SITE        364
FT                   /evidence="ECO:0000250|UniProtKB:P0AFG6"
FT   ACT_SITE        368
FT                   /evidence="ECO:0000250|UniProtKB:P0AFG6"
FT   MOD_RES         44
FT                   /note="N6-lipoyllysine"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01066"
SQ   SEQUENCE   393 AA;  45154 MW;  567682324ED9361D CRC64;
     MNRINILVPD LPESVNDAVV VKWYKKIGEQ ISSEDNIVDI ETDKVMLEVS APCNGILNEI
     LEKEGSIVKS NQILGNIVES KNIESKTKSK LEKSNKYFIK DKNFNISFKE KIYNFPPSIR
     RIIRIKKNKE IFNELNYIKN QENIIEEKLN DQSFSNEKEK KIYENRIKMT RLRQKIAERL
     LETKNNTAML TTFNEVNMQP IISLRKKYGE FFEKKHGVRI GFMPFFVKAV VESLKKFPEI
     NASIDKNDIV YYKNIDVSIA VSTPRGVITP VLRNADNMSM ADIEKKIKEF SIKGIENKIK
     IEELIGGNFT ITNGGIFGSL MSTPIINPPQ SAILGMHLIK ERPMAINGKV KILPMMYLAL
     SYDHRLIDGK ESVSFLVTIK NILEDFNRII INV