ID   ETFB_CLOAB              Reviewed;         259 AA.
AC   P52040;
DT   01-OCT-1996, integrated into UniProtKB/Swiss-Prot.
DT   29-AUG-2001, sequence version 2.
DT   03-AUG-2022, entry version 113.
DE   RecName: Full=Electron transfer flavoprotein subunit beta;
DE            Short=Beta-ETF;
DE   AltName: Full=Electron transfer flavoprotein small subunit;
DE            Short=ETFSS;
GN   Name=etfB; OrderedLocusNames=CA_C2710;
OS   Clostridium acetobutylicum (strain ATCC 824 / DSM 792 / JCM 1419 / LMG 5710
OS   / VKM B-1787).
OC   Bacteria; Firmicutes; Clostridia; Eubacteriales; Clostridiaceae;
OC   Clostridium.
OX   NCBI_TaxID=272562;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 824 / DSM 792 / JCM 1419 / LMG 5710 / VKM B-1787;
RX   PubMed=8655474; DOI=10.1128/jb.178.11.3015-3024.1996;
RA   Boynton Z.L., Bennett G.N., Rudolph F.B.;
RT   "Cloning, sequencing, and expression of clustered genes encoding beta-
RT   hydroxybutyryl-coenzyme A (CoA) dehydrogenase, crotonase, and butyryl-CoA
RT   dehydrogenase from Clostridium acetobutylicum ATCC 824.";
RL   J. Bacteriol. 178:3015-3024(1996).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 824 / DSM 792 / JCM 1419 / LMG 5710 / VKM B-1787;
RX   PubMed=11466286; DOI=10.1128/jb.183.16.4823-4838.2001;
RA   Noelling J., Breton G., Omelchenko M.V., Makarova K.S., Zeng Q., Gibson R.,
RA   Lee H.M., Dubois J., Qiu D., Hitti J., Wolf Y.I., Tatusov R.L., Sabathe F.,
RA   Doucette-Stamm L.A., Soucaille P., Daly M.J., Bennett G.N., Koonin E.V.,
RA   Smith D.R.;
RT   "Genome sequence and comparative analysis of the solvent-producing
RT   bacterium Clostridium acetobutylicum.";
RL   J. Bacteriol. 183:4823-4838(2001).
CC   -!- FUNCTION: The electron transfer flavoprotein serves as a specific
CC       electron acceptor for other dehydrogenases. It transfers the electrons
CC       to the main respiratory chain via ETF-ubiquinone oxidoreductase (ETF
CC       dehydrogenase) (By similarity). {ECO:0000250}.
CC   -!- COFACTOR:
CC       Name=FAD; Xref=ChEBI:CHEBI:57692; Evidence={ECO:0000250};
CC       Note=Binds 1 FAD per dimer. {ECO:0000250};
CC   -!- COFACTOR:
CC       Name=AMP; Xref=ChEBI:CHEBI:456215; Evidence={ECO:0000250};
CC       Note=Binds 1 AMP per subunit. {ECO:0000250};
CC   -!- SUBUNIT: Heterodimer of an alpha and a beta subunit.
CC   -!- SIMILARITY: Belongs to the ETF beta-subunit/FixA family. {ECO:0000305}.
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DR   EMBL; U17110; AAA95969.1; -; Genomic_DNA.
DR   EMBL; AE001437; AAK80656.1; -; Genomic_DNA.
DR   PIR; E97233; E97233.
DR   PIR; T47263; T47263.
DR   RefSeq; NP_349316.1; NC_003030.1.
DR   RefSeq; WP_010965997.1; NC_003030.1.
DR   AlphaFoldDB; P52040; -.
DR   SMR; P52040; -.
DR   STRING; 272562.CA_C2710; -.
DR   EnsemblBacteria; AAK80656; AAK80656; CA_C2710.
DR   GeneID; 44999199; -.
DR   KEGG; cac:CA_C2710; -.
DR   PATRIC; fig|272562.8.peg.2900; -.
DR   eggNOG; COG2086; Bacteria.
DR   HOGENOM; CLU_060196_2_1_9; -.
DR   OMA; TNVYKSF; -.
DR   OrthoDB; 1027643at2; -.
DR   BioCyc; MetaCyc:MON-21350; -.
DR   Proteomes; UP000000814; Chromosome.
DR   GO; GO:0009055; F:electron transfer activity; IEA:InterPro.
DR   CDD; cd01714; ETF_beta; 1.
DR   Gene3D; 3.40.50.620; -; 1.
DR   InterPro; IPR000049; ET-Flavoprotein_bsu_CS.
DR   InterPro; IPR014730; ETF_a/b_N.
DR   InterPro; IPR012255; ETF_b.
DR   InterPro; IPR033948; ETF_beta_N.
DR   InterPro; IPR014729; Rossmann-like_a/b/a_fold.
DR   PANTHER; PTHR21294; PTHR21294; 1.
DR   Pfam; PF01012; ETF; 1.
DR   PIRSF; PIRSF000090; Beta-ETF; 1.
DR   SMART; SM00893; ETF; 1.
DR   PROSITE; PS01065; ETF_BETA; 1.
PE   3: Inferred from homology;
KW   Electron transport; FAD; Flavoprotein; Reference proteome; Transport.
FT   CHAIN           1..259
FT                   /note="Electron transfer flavoprotein subunit beta"
FT                   /id="PRO_0000167877"
FT   CONFLICT        247..259
FT                   /note="AYVVSKLKEEHYI -> DMLSQN (in Ref. 1; AAA95969)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   259 AA;  28049 MW;  D82D07659B18F77D CRC64;
     MNIVVCLKQV PDTAEVRIDP VKGTLIREGV PSIINPDDKN ALEEALVLKD NYGAHVTVIS
     MGPPQAKNAL VEALAMGADE AVLLTDRAFG GADTLATSHT IAAGIKKLKY DIVFAGRQAI
     DGDTAQVGPE IAEHLGIPQV TYVEKVEVDG DTLKIRKAWE DGYEVVEVKT PVLLTAIKEL
     NVPRYMSVEK IFGAFDKEVK MWTADDIDVD KANLGLKGSP TKVKKSSTKE VKGQGEVIDK
     PVKEAAAYVV SKLKEEHYI