ID A0A3N5ADH6_9THEO Unreviewed; 330 AA.
AC A0A3N5ADH6;
DT 13-FEB-2019, integrated into UniProtKB/TrEMBL.
DT 13-FEB-2019, sequence version 1.
DT 27-MAR-2024, entry version 17.
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=EDD75_1705 {ECO:0000313|EMBL:RPF42603.1};
OS Thermodesulfitimonas autotrophica.
OC Bacteria; Bacillota; Clostridia; Thermoanaerobacterales;
OC Thermoanaerobacteraceae; Thermodesulfitimonas.
OX NCBI_TaxID=1894989 {ECO:0000313|EMBL:RPF42603.1, ECO:0000313|Proteomes:UP000282654};
RN [1] {ECO:0000313|EMBL:RPF42603.1, ECO:0000313|Proteomes:UP000282654}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 102936 {ECO:0000313|EMBL:RPF42603.1,
RC ECO:0000313|Proteomes:UP000282654};
RA Goeker M.;
RT "Genomic Encyclopedia of Type Strains, Phase IV (KMG-IV): sequencing the
RT most valuable type-strain genomes for metagenomic binning, comparative
RT biology and taxonomic classification.";
RL Submitted (NOV-2018) 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:RPF42603.1}.
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DR EMBL; RKRE01000003; RPF42603.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A3N5ADH6; -.
DR OrthoDB; 9815506at2; -.
DR UniPathway; UPA00094; -.
DR Proteomes; UP000282654; Unassembled WGS sequence.
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|ARBA:ARBA00023315, ECO:0000256|HAMAP-
KW 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:UP000282654};
KW Transferase {ECO:0000256|ARBA:ARBA00022679, ECO:0000256|HAMAP-
KW Rule:MF_01815}.
FT DOMAIN 111..189
FT /note="Beta-ketoacyl-[acyl-carrier-protein] synthase III N-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF08545"
FT DOMAIN 241..330
FT /note="Beta-ketoacyl-[acyl-carrier-protein] synthase III C-
FT terminal"
FT /evidence="ECO:0000259|Pfam:PF08541"
FT REGION 258..262
FT /note="ACP-binding"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 117
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 257
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
FT ACT_SITE 287
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01815"
SQ SEQUENCE 330 AA; 34932 MW; 335A9724DCEFEF66 CRC64;
MGKDGLTAGI TGLGVYVPER VLTNFDLERM VETSDAWIQE RTGIRERRIA APEENTSDLA
ANAAKGALAA AGLRPEEVEL LIVATATPDM LFPATACLVQ DRLGAKQAAA FDLEAGCSGF
VYGLAVAAQF INAGCYRNVL VIGADTLSRV TNWKDRTTCV LFGDGAGAAV VQPVAPPRGI
LSLYLRADGS GSELLKLPAG GARLPASPET VQAGLHYLHM NGREVFKFAV RSMEEASLEA
LRRAGLEPEE LGCFIPHQAN VRIIDAVAKR LNLPPEKIFV NVDRYGNTSA ASIPIALYEA
VKSGKVKPGT AVLLVAFGAG LTWGGVVLRY
//
