FABH_STAA2
ID FABH_STAA2 Reviewed; 313 AA.
AC A6U089;
DT 20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT 21-AUG-2007, sequence version 1.
DT 25-MAY-2022, entry version 82.
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};
GN OrderedLocusNames=SaurJH1_1001;
OS Staphylococcus aureus (strain JH1).
OC Bacteria; Firmicutes; Bacilli; Bacillales; Staphylococcaceae;
OC Staphylococcus.
OX NCBI_TaxID=359787;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=JH1;
RG US DOE Joint Genome Institute;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA Chain P., Malfatti S., Shin M., Vergez L., Schmutz J., Larimer F., Land M.,
RA Hauser L., Kyrpides N., Ivanova N., Tomasz A., Richardson P.;
RT "Complete sequence of chromosome of Staphylococcus aureus subsp. aureus
RT JH1.";
RL Submitted (JUN-2007) 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: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; CP000736; ABR51857.1; -; Genomic_DNA.
DR RefSeq; WP_001100526.1; NC_009632.1.
DR AlphaFoldDB; A6U089; -.
DR SMR; A6U089; -.
DR KEGG; sah:SaurJH1_1001; -.
DR HOGENOM; CLU_039592_3_1_9; -.
DR OMA; WGSEGDK; -.
DR UniPathway; UPA00094; -.
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..313
FT /note="3-oxoacyl-[acyl-carrier-protein] synthase 3"
FT /id="PRO_1000088324"
FT REGION 239..243
FT /note="ACP-binding"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 112
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 238
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 268
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
SQ SEQUENCE 313 AA; 33879 MW; 728D2DCCAB9B95F7 CRC64;
MNVGIKGFGA YAPEKIIDNA YFEQFLDTSD EWISKMTGIK ERHWADDDQD TSDLAYEASV
KAIADAGIQP EDIDMIIVAT ATGDMPFPTV ANMLQERLGT GKVASMDQLA ACSGFMYSMI
TAKQYVQSGD YHNILVVGAD KLSKITDLTD RSTAVLFGDG AGAVIIGEVS EGRGIISYEM
GSDGTGGKHL YLDKDTGKLK MNGREVFKFA VRIMGDASTR VVEKANLTSD DIDLFIPHQA
NIRIMESARE RLGISKDKMS VSVNKYGNTS AASIPLSIDQ ELKNGKLKDD DTIVLVGFGG
GLTWGAMTIK WGK
