FABH_MYCA9
ID FABH_MYCA9 Reviewed; 340 AA.
AC B1MKD7;
DT 28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT 29-APR-2008, sequence version 1.
DT 25-MAY-2022, entry version 87.
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}; OrderedLocusNames=MAB_1141c;
OS Mycobacteroides abscessus (strain ATCC 19977 / DSM 44196 / CIP 104536 / JCM
OS 13569 / NCTC 13031 / TMC 1543) (Mycobacterium abscessus).
OC Bacteria; Actinobacteria; Corynebacteriales; Mycobacteriaceae;
OC Mycobacteroides; Mycobacteroides abscessus.
OX NCBI_TaxID=561007;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 19977 / DSM 44196 / CIP 104536 / JCM 13569 / NCTC 13031 / TMC
RC 1543;
RX PubMed=19543527; DOI=10.1371/journal.pone.0005660;
RA Ripoll F., Pasek S., Schenowitz C., Dossat C., Barbe V., Rottman M.,
RA Macheras E., Heym B., Herrmann J.L., Daffe M., Brosch R., Risler J.L.,
RA Gaillard J.L.;
RT "Non mycobacterial virulence genes in the genome of the emerging pathogen
RT Mycobacterium abscessus.";
RL PLoS ONE 4:E5660-E5660(2009).
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; CU458896; CAM61229.1; -; Genomic_DNA.
DR RefSeq; WP_005109965.1; NZ_MLCG01000004.1.
DR AlphaFoldDB; B1MKD7; -.
DR SMR; B1MKD7; -.
DR EnsemblBacteria; CAM61229; CAM61229; MAB_1141c.
DR GeneID; 66971527; -.
DR KEGG; mab:MAB_1141c; -.
DR OMA; WGSEGDK; -.
DR UniPathway; UPA00094; -.
DR Proteomes; UP000007137; 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; -; 2.
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..340
FT /note="3-oxoacyl-[acyl-carrier-protein] synthase 3"
FT /id="PRO_1000187878"
FT REGION 261..265
FT /note="ACP-binding"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 122
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 260
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 291
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
SQ SEQUENCE 340 AA; 35546 MW; 26E733895E7CD90B CRC64;
MTDIAEITGI NKIGLLSLGA YRPERVVTND EICERIESSD EWIYTRTGIK TRRFAADEET
AQTLAIEAGR KAIANALLTG AEIDAVIVAT STHYLQTPAS APAVATALGA QGVPAFDLSA
GCAGFGYAVG VAGDMIRGGS ASKVLVIGSE KLSPALDMTD RGNCFIFGDG AGAVVVGETA
EQGIGPTVWG SDGSQSNAIR QDIDWMDFAA APDPEGPRPY LRIEGTSVFR WAAFEMGKVG
QRAMEAAKVG PEQIDVFVPH QANTRINELL AKNLHLRADA VIANDIEHTG NTSAASVPLA
METLLSTGAA KPGDLALLIG YGAGLSYAAQ VVRMPPVPFE
