ID A0A0Q8NY40_9ACTN Unreviewed; 343 AA.
AC A0A0Q8NY40;
DT 20-JAN-2016, integrated into UniProtKB/TrEMBL.
DT 20-JAN-2016, sequence version 1.
DT 27-MAR-2024, entry version 36.
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=ASE03_07220 {ECO:0000313|EMBL:KRB62382.1};
OS Kitasatospora sp. Root187.
OC Bacteria; Actinomycetota; Actinomycetes; Kitasatosporales;
OC Streptomycetaceae; Kitasatospora.
OX NCBI_TaxID=1736486 {ECO:0000313|EMBL:KRB62382.1, ECO:0000313|Proteomes:UP000051829};
RN [1] {ECO:0000313|EMBL:KRB62382.1, ECO:0000313|Proteomes:UP000051829}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Root187 {ECO:0000313|EMBL:KRB62382.1,
RC ECO:0000313|Proteomes:UP000051829};
RA Gilbert D.G.;
RL Submitted (OCT-2015) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:KRB62382.1, ECO:0000313|Proteomes:UP000051829}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Root187 {ECO:0000313|EMBL:KRB62382.1,
RC ECO:0000313|Proteomes:UP000051829};
RA Schulze-Lefert P.;
RT "Functional overlap of the Arabidopsis leaf and root microbiotas.";
RL Submitted (NOV-2015) 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}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:KRB62382.1}.
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DR EMBL; LMHX01000045; KRB62382.1; -; Genomic_DNA.
DR RefSeq; WP_057238784.1; NZ_LMHX01000045.1.
DR AlphaFoldDB; A0A0Q8NY40; -.
DR STRING; 1736486.ASE03_07220; -.
DR UniPathway; UPA00094; -.
DR Proteomes; UP000051829; Unassembled WGS sequence.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0016020; C:membrane; IEA:UniProtKB-KW.
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 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}; Membrane {ECO:0000256|SAM:Phobius};
KW Multifunctional enzyme {ECO:0000256|HAMAP-Rule:MF_01815};
KW Reference proteome {ECO:0000313|Proteomes:UP000051829};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_01815}; Transmembrane {ECO:0000256|SAM:Phobius};
KW Transmembrane helix {ECO:0000256|SAM:Phobius}.
FT TRANSMEM 323..342
FT /note="Helical"
FT /evidence="ECO:0000256|SAM:Phobius"
FT DOMAIN 118..195
FT /note="Beta-ketoacyl-[acyl-carrier-protein] synthase III N-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF08545"
FT DOMAIN 252..341
FT /note="Beta-ketoacyl-[acyl-carrier-protein] synthase III C-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF08541"
FT REGION 269..273
FT /note="ACP-binding"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 124
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 268
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 299
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
SQ SEQUENCE 343 AA; 35567 MW; 5F867C6802529259 CRC64;
MTSPQIQSST GAAFARIHGV GGYRPVRVIP NSEVLNWIES SDEWIRSRSG ITERRWAGPE
ESVAEMSVQA AGKAIAQAGI GPEQIGGVIV ATVSHLKQTP AIATEIAQRL GCGTAPAFDI
SAACAGFGYG LSLADGMVRG GSAEYVLVIG VERLSDLTDT SDRSTAFIFG DGAGAAIVGP
SDTPGIGKVI WGSDGAQKDV ISQTQAWDTA FAKADAVNGT GEEVKWPALR MEGQSVFRWA
VWEMAKVAQQ ALDAAGITAD QLGAFIPHQA NMRITDAMIK ALKLPATVPV ARDIAETGNT
SAASIPLAME RMLESGEARS GDLALIIGFG AGLVYAAAVV TLP
//
