FABH_CAMJD
ID FABH_CAMJD Reviewed; 324 AA.
AC A7H541;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 11-SEP-2007, sequence version 1.
DT 03-AUG-2022, entry version 77.
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};
GN OrderedLocusNames=JJD26997_1630;
OS Campylobacter jejuni subsp. doylei (strain ATCC BAA-1458 / RM4099 /
OS 269.97).
OC Bacteria; Proteobacteria; Epsilonproteobacteria; Campylobacterales;
OC Campylobacteraceae; Campylobacter.
OX NCBI_TaxID=360109;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-1458 / RM4099 / 269.97;
RA Fouts D.E., Mongodin E.F., Puiu D., Sebastian Y., Miller W.G.,
RA Mandrell R.E., Lastovica A.J., Nelson K.E.;
RT "Complete genome sequence of Campylobacter jejuni subsp doylei 269.97
RT isolated from human blood.";
RL Submitted (JUL-2007) to the EMBL/GenBank/DDBJ databases.
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; CP000768; ABS44499.1; -; Genomic_DNA.
DR AlphaFoldDB; A7H541; -.
DR SMR; A7H541; -.
DR EnsemblBacteria; ABS44499; ABS44499; JJD26997_1630.
DR KEGG; cjd:JJD26997_1630; -.
DR HOGENOM; CLU_039592_4_0_7; -.
DR OMA; WGSEGDK; -.
DR UniPathway; UPA00094; -.
DR Proteomes; UP000002302; 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; Transferase.
FT CHAIN 1..324
FT /note="3-oxoacyl-[acyl-carrier-protein] synthase 3"
FT /id="PRO_1000056336"
FT REGION 247..251
FT /note="ACP-binding"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 114
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 246
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 276
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
SQ SEQUENCE 324 AA; 35191 MW; 5CE20F0FD061E86F CRC64;
MLKASLKSIA SYIPEKILSN TDLEKMVDTT DEWIARRTGI KERRIANENE NTSDLGTKAA
LKAIERANLK PEDIDAILVA TLSPDYFTMP STACKIASNL GLVNISAFDI SAACSGFIYL
LEQAKALVES GLKKNVLIIG AEKTSSIMDY SDRSICILFG DGAGAGVVSL DNENYILDVH
TASNGNYGDL LMTQRSQKSS LCQTLSMQMK GNEVFKIAVN TLSNDVVEIL AKNNILAQEI
DLFIPHQANL RIIKAVQEKL NLSDEKCVIT VQKYGNTSAA SIPMAMNDAY EEGRLKKGNL
ILLDAFGGGF TWGSALLKFG GENF
