ID   FABH_DICNV              Reviewed;         322 AA.
AC   A5EXD7;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   12-JUN-2007, sequence version 1.
DT   25-MAY-2022, entry version 86.
DE   RecName: Full=3-oxoacyl-[acyl-carrier-protein] synthase 3 {ECO:0000255|HAMAP-Rule:MF_01815};
DE            EC=2.3.1.180 {ECO:0000255|HAMAP-Rule:MF_01815};
DE   AltName: Full=3-oxoacyl-[acyl-carrier-protein] synthase III {ECO:0000255|HAMAP-Rule:MF_01815};
DE   AltName: Full=Beta-ketoacyl-ACP synthase III {ECO:0000255|HAMAP-Rule:MF_01815};
DE            Short=KAS III {ECO:0000255|HAMAP-Rule:MF_01815};
GN   Name=fabH {ECO:0000255|HAMAP-Rule:MF_01815}; OrderedLocusNames=DNO_1207;
OS   Dichelobacter nodosus (strain VCS1703A).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Cardiobacteriales;
OC   Cardiobacteriaceae; Dichelobacter.
OX   NCBI_TaxID=246195;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=VCS1703A;
RX   PubMed=17468768; DOI=10.1038/nbt1302;
RA   Myers G.S.A., Parker D., Al-Hasani K., Kennan R.M., Seemann T., Ren Q.,
RA   Badger J.H., Selengut J.D., Deboy R.T., Tettelin H., Boyce J.D.,
RA   McCarl V.P., Han X., Nelson W.C., Madupu R., Mohamoud Y., Holley T.,
RA   Fedorova N., Khouri H., Bottomley S.P., Whittington R.J., Adler B.,
RA   Songer J.G., Rood J.I., Paulsen I.T.;
RT   "Genome sequence and identification of candidate vaccine antigens from the
RT   animal pathogen Dichelobacter nodosus.";
RL   Nat. Biotechnol. 25:569-575(2007).
CC   -!- FUNCTION: Catalyzes the condensation reaction of fatty acid synthesis
CC       by the addition to an acyl acceptor of two carbons from malonyl-ACP.
CC       Catalyzes the first condensation reaction which initiates fatty acid
CC       synthesis and may therefore play a role in governing the total rate of
CC       fatty acid production. Possesses both acetoacetyl-ACP synthase and
CC       acetyl transacylase activities. Its substrate specificity determines
CC       the biosynthesis of branched-chain and/or straight-chain of fatty
CC       acids. {ECO:0000255|HAMAP-Rule:MF_01815}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=acetyl-CoA + H(+) + malonyl-[ACP] = 3-oxobutanoyl-[ACP] + CO2
CC         + CoA; Xref=Rhea:RHEA:12080, Rhea:RHEA-COMP:9623, Rhea:RHEA-
CC         COMP:9625, ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:57287,
CC         ChEBI:CHEBI:57288, ChEBI:CHEBI:78449, ChEBI:CHEBI:78450;
CC         EC=2.3.1.180; Evidence={ECO:0000255|HAMAP-Rule:MF_01815};
CC   -!- PATHWAY: Lipid metabolism; fatty acid biosynthesis. {ECO:0000255|HAMAP-
CC       Rule:MF_01815}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01815}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_01815}.
CC   -!- DOMAIN: The last Arg residue of the ACP-binding site is essential for
CC       the weak association between ACP/AcpP and FabH. {ECO:0000255|HAMAP-
CC       Rule:MF_01815}.
CC   -!- SIMILARITY: Belongs to the thiolase-like superfamily. FabH family.
CC       {ECO:0000255|HAMAP-Rule:MF_01815}.
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DR   EMBL; CP000513; ABQ13902.1; -; Genomic_DNA.
DR   RefSeq; WP_012031510.1; NC_009446.1.
DR   AlphaFoldDB; A5EXD7; -.
DR   SMR; A5EXD7; -.
DR   STRING; 246195.DNO_1207; -.
DR   EnsemblBacteria; ABQ13902; ABQ13902; DNO_1207.
DR   KEGG; dno:DNO_1207; -.
DR   eggNOG; COG0332; Bacteria.
DR   HOGENOM; CLU_039592_3_1_6; -.
DR   OMA; WGSEGDK; -.
DR   OrthoDB; 872193at2; -.
DR   UniPathway; UPA00094; -.
DR   Proteomes; UP000000248; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0004315; F:3-oxoacyl-[acyl-carrier-protein] synthase activity; IEA:InterPro.
DR   GO; GO:0033818; F:beta-ketoacyl-acyl-carrier-protein synthase III activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0006633; P:fatty acid biosynthetic process; IEA:UniProtKB-UniRule.
DR   Gene3D; 3.40.47.10; -; 1.
DR   HAMAP; MF_01815; FabH; 1.
DR   InterPro; IPR013751; ACP_syn_III.
DR   InterPro; IPR013747; ACP_syn_III_C.
DR   InterPro; IPR004655; FabH_synth.
DR   InterPro; IPR016039; Thiolase-like.
DR   Pfam; PF08545; ACP_syn_III; 1.
DR   Pfam; PF08541; ACP_syn_III_C; 1.
DR   SUPFAM; SSF53901; SSF53901; 1.
DR   TIGRFAMs; TIGR00747; fabH; 1.
PE   3: Inferred from homology;
KW   Acyltransferase; Cytoplasm; Fatty acid biosynthesis; Fatty acid metabolism;
KW   Lipid biosynthesis; Lipid metabolism; Multifunctional enzyme;
KW   Reference proteome; Transferase.
FT   CHAIN           1..322
FT                   /note="3-oxoacyl-[acyl-carrier-protein] synthase 3"
FT                   /id="PRO_1000088310"
FT   REGION          250..254
FT                   /note="ACP-binding"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT   ACT_SITE        113
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT   ACT_SITE        249
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT   ACT_SITE        279
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
SQ   SEQUENCE   322 AA;  35048 MW;  40D7BE253FA614D7 CRC64;
     MMYSKIIGTG GYLPSRIVSN DELSQSMQTS DEWIYSRTGI RQRHLASPDE SCSDMAFYAA
     KRALENAHIE ADAIDLIIVA TSTPEHIFPS TATVVQSRLS CQRAAAFDVQ AACTGFMYAL
     NTADCFIKSG QYQNVLVIGA EVFSRIVDWQ DRNTAVLFGD GAGAVVLSAS EEAGILGTIL
     HADGSHKELL WVPQGIGSSE TDFATRRPFI EMQGREVFKF AVRSLTHLVS ELLVQCQMSA
     DEIDFLIPHQ ANSRIIQAVA EHLNLPIEKV IITVNQHANT SAASVPLALD YGVQNGIIKR
     GDNLLLEAFG GGFTWGGCIL TY