ID A0A161I165_9MICO Unreviewed; 336 AA.
AC A0A161I165;
DT 06-JUL-2016, integrated into UniProtKB/TrEMBL.
DT 06-JUL-2016, sequence version 1.
DT 27-MAR-2024, entry version 29.
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_1 {ECO:0000313|EMBL:ANC29879.1};
GN Synonyms=fabH {ECO:0000256|HAMAP-Rule:MF_01815};
GN ORFNames=I598_0290 {ECO:0000313|EMBL:ANC29879.1};
OS Isoptericola dokdonensis DS-3.
OC Bacteria; Actinomycetota; Actinomycetes; Micrococcales;
OC Promicromonosporaceae; Isoptericola.
OX NCBI_TaxID=1300344 {ECO:0000313|EMBL:ANC29879.1, ECO:0000313|Proteomes:UP000076794};
RN [1] {ECO:0000313|EMBL:ANC29879.1, ECO:0000313|Proteomes:UP000076794}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DS-3 {ECO:0000313|EMBL:ANC29879.1,
RC ECO:0000313|Proteomes:UP000076794};
RA Kwon S.-K., Kim J.F.;
RT "Complete genome sequence of a soil Actinobacterium, Isoptericola
RT dokdonensis DS-3.";
RL Submitted (JAN-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; CP014209; ANC29879.1; -; Genomic_DNA.
DR RefSeq; WP_068200646.1; NZ_CP014209.1.
DR AlphaFoldDB; A0A161I165; -.
DR STRING; 1300344.I598_0290; -.
DR KEGG; ido:I598_0290; -.
DR PATRIC; fig|1300344.3.peg.288; -.
DR UniPathway; UPA00094; -.
DR Proteomes; UP000076794; 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; -; 2.
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 ECO:0000313|EMBL:ANC29879.1};
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:UP000076794};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_01815}.
FT DOMAIN 119..196
FT /note="Beta-ketoacyl-[acyl-carrier-protein] synthase III N-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF08545"
FT DOMAIN 245..333
FT /note="Beta-ketoacyl-[acyl-carrier-protein] synthase III C-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF08541"
FT REGION 262..266
FT /note="ACP-binding"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 125
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 261
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 292
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
SQ SEQUENCE 336 AA; 35115 MW; 04FE0BCD408A2430 CRC64;
MTTRKALRQA EPVRHSRILA LGAERGTATV TNDDVAGPID SSDEWIRQRT GIVTRRRASA
DVDVIDLAEA AARRAMDAAG LTGADVDAVI LSTITWFHQT PSGAAVLADR LGATPAAAYD
VSAACAGYSY GIAQADALVR SGAARHVLVV GAEKLSDFVD PTDRTISFLL GDGAGAAIVG
PSDTPGIGPT VWGSDGSRAQ AIRQTHPWTD LRDSPDAGFA TMRQDGQTVF KWASFQMAPI
AAKAMAEAGV EPDDIQAFVP HQANMRIIDQ MIKQLRLPES VVVARDIAET GNTSAASIPL
AAHRLLAEGR VSSGDLALQI GFGAGLVYAA QVVVLP
//
