ID A0A1Y0MJQ6_9FLAO Unreviewed; 331 AA.
AC A0A1Y0MJQ6;
DT 30-AUG-2017, integrated into UniProtKB/TrEMBL.
DT 30-AUG-2017, sequence version 1.
DT 27-MAR-2024, entry version 20.
DE RecName: Full=Beta-ketoacyl-[acyl-carrier-protein] synthase III {ECO:0000256|HAMAP-Rule:MF_01815};
DE Short=Beta-ketoacyl-ACP synthase III {ECO:0000256|HAMAP-Rule:MF_01815};
DE Short=KAS III {ECO:0000256|HAMAP-Rule:MF_01815};
DE EC=2.3.1.180 {ECO:0000256|HAMAP-Rule:MF_01815};
DE AltName: Full=3-oxoacyl-[acyl-carrier-protein] synthase 3 {ECO:0000256|HAMAP-Rule:MF_01815};
DE AltName: Full=3-oxoacyl-[acyl-carrier-protein] synthase III {ECO:0000256|HAMAP-Rule:MF_01815};
GN Name=fabH {ECO:0000256|HAMAP-Rule:MF_01815};
GN ORFNames=BTO05_08870 {ECO:0000313|EMBL:ARV09749.1};
OS Winogradskyella sp. PC-19.
OC Bacteria; Bacteroidota; Flavobacteriia; Flavobacteriales;
OC Flavobacteriaceae; Winogradskyella.
OX NCBI_TaxID=754417 {ECO:0000313|EMBL:ARV09749.1, ECO:0000313|Proteomes:UP000195547};
RN [1] {ECO:0000313|EMBL:ARV09749.1, ECO:0000313|Proteomes:UP000195547}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PC-19 {ECO:0000313|EMBL:ARV09749.1,
RC ECO:0000313|Proteomes:UP000195547};
RA Kumagai Y., Yoshizawa S., Kogure K., Iwasaki W.;
RT "Trade-off between light-utilization and light-protection in marine
RT flavobacteria.";
RL Submitted (DEC-2016) 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:0000256|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:0000256|HAMAP-Rule:MF_01815};
CC -!- PATHWAY: Lipid metabolism; fatty acid biosynthesis. {ECO:0000256|HAMAP-
CC Rule:MF_01815}.
CC -!- SUBUNIT: Homodimer. {ECO:0000256|HAMAP-Rule:MF_01815}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|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:0000256|HAMAP-
CC Rule:MF_01815}.
CC -!- SIMILARITY: Belongs to the thiolase-like superfamily. FabH family.
CC {ECO:0000256|ARBA:ARBA00008642, ECO:0000256|HAMAP-Rule:MF_01815}.
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DR EMBL; CP019332; ARV09749.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1Y0MJQ6; -.
DR OrthoDB; 9815506at2; -.
DR UniPathway; UPA00094; -.
DR Proteomes; UP000195547; 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 CDD; cd00830; KAS_III; 1.
DR Gene3D; 3.40.47.10; -; 1.
DR HAMAP; MF_01815; FabH; 1.
DR InterPro; IPR013747; ACP_syn_III_C.
DR InterPro; IPR013751; ACP_syn_III_N.
DR InterPro; IPR004655; FabH.
DR InterPro; IPR016039; Thiolase-like.
DR NCBIfam; TIGR00747; fabH; 1.
DR PANTHER; PTHR34069; 3-OXOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE 3; 1.
DR PANTHER; PTHR34069:SF2; BETA-KETOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE III; 1.
DR Pfam; PF08545; ACP_syn_III; 1.
DR Pfam; PF08541; ACP_syn_III_C; 1.
DR SUPFAM; SSF53901; Thiolase-like; 1.
PE 3: Inferred from homology;
KW Acyltransferase {ECO:0000256|HAMAP-Rule:MF_01815};
KW Cytoplasm {ECO:0000256|ARBA:ARBA00022490, ECO:0000256|HAMAP-Rule:MF_01815};
KW Fatty acid biosynthesis {ECO:0000256|ARBA:ARBA00023160, ECO:0000256|HAMAP-
KW Rule:MF_01815};
KW Fatty acid metabolism {ECO:0000256|ARBA:ARBA00022832, ECO:0000256|HAMAP-
KW Rule:MF_01815};
KW Lipid biosynthesis {ECO:0000256|ARBA:ARBA00022516, ECO:0000256|HAMAP-
KW Rule:MF_01815};
KW Lipid metabolism {ECO:0000256|ARBA:ARBA00023098, ECO:0000256|HAMAP-
KW Rule:MF_01815}; Multifunctional enzyme {ECO:0000256|HAMAP-Rule:MF_01815};
KW Reference proteome {ECO:0000313|Proteomes:UP000195547};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_01815}.
FT DOMAIN 110..188
FT /note="Beta-ketoacyl-[acyl-carrier-protein] synthase III N-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF08545"
FT DOMAIN 240..327
FT /note="Beta-ketoacyl-[acyl-carrier-protein] synthase III C-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF08541"
FT REGION 257..261
FT /note="ACP-binding"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 116
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 256
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 286
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
SQ SEQUENCE 331 AA; 36281 MW; 7F6581C3B95A5DB0 CRC64;
MSKITAAITA VGGYVPDFVL SNKVLETMVD TNDEWITTRT GIKERRILKE EGKGTSFLAI
KAAENLLEKS GLNPKEIDLV IVATATPDMK AASTAAYTAT QIGATNAFSY DLEAACSSFL
FGMSTAAAYI ESGRYKKILL IGADKNSSFI NYKDRATCII FGDGGGAVLF EPNNEGLGLQ
DELLRSDGKG REFLRAQFGG SSYPINKDTF DEGSHYVFQD GKTVFKNAVF NMADVAERIL
KRNNLTNDDV NWLAAHQANK RIIDATANRI KLEEDKVLMN IQKYGNTTSA TLPLLLHDFE
SQLKKGDTII FAAFGGGFTW GSIYFKWAYN S
//
