ID B1X4N6_PAUCH Unreviewed; 415 AA.
AC B1X4N6;
DT 20-MAY-2008, integrated into UniProtKB/TrEMBL.
DT 20-MAY-2008, sequence version 1.
DT 27-MAR-2024, entry version 64.
DE RecName: Full=3-oxoacyl-[acyl-carrier-protein] synthase {ECO:0000256|PIRNR:PIRNR000447};
GN Name=fabF {ECO:0000313|EMBL:ACB42905.1};
GN OrderedLocusNames=PCC_0466 {ECO:0000313|EMBL:ACB42905.1};
OS Paulinella chromatophora.
OG Plastid; Organellar chromatophore {ECO:0000313|EMBL:ACB42905.1}.
OC Eukaryota; Sar; Rhizaria; Cercozoa; Imbricatea; Silicofilosea; Euglyphida;
OC Paulinellidae; Paulinella.
OX NCBI_TaxID=39717 {ECO:0000313|EMBL:ACB42905.1};
RN [1] {ECO:0000313|EMBL:ACB42905.1}
RP NUCLEOTIDE SEQUENCE.
RA Gloeckner G., Nowack E., Melkonian M.;
RL Submitted (AUG-2007) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:ACB42905.1}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=18356055; DOI=10.1016/j.cub.2008.02.051;
RA Nowack E.C.M., Melkonian M., Gloeckner G.;
RT "Chromatophore genome sequence of Paulinella sheds light on acquisition of
RT photosynthesis by eukaryotes.";
RL Curr. Biol. 18:410-418(2008).
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H(+) + hexanoyl-[ACP] + malonyl-[ACP] = 3-oxooctanoyl-[ACP] +
CC CO2 + holo-[ACP]; Xref=Rhea:RHEA:41836, Rhea:RHEA-COMP:9623,
CC Rhea:RHEA-COMP:9632, Rhea:RHEA-COMP:9633, Rhea:RHEA-COMP:9685,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:64479,
CC ChEBI:CHEBI:78449, ChEBI:CHEBI:78459, ChEBI:CHEBI:78460;
CC Evidence={ECO:0000256|ARBA:ARBA00023361};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41837;
CC Evidence={ECO:0000256|ARBA:ARBA00023361};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H(+) + malonyl-[ACP] + octanoyl-[ACP] = 3-oxodecanoyl-[ACP] +
CC CO2 + holo-[ACP]; Xref=Rhea:RHEA:41852, Rhea:RHEA-COMP:9623,
CC Rhea:RHEA-COMP:9636, Rhea:RHEA-COMP:9637, Rhea:RHEA-COMP:9685,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:64479,
CC ChEBI:CHEBI:78449, ChEBI:CHEBI:78463, ChEBI:CHEBI:78464;
CC Evidence={ECO:0000256|ARBA:ARBA00023414};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41853;
CC Evidence={ECO:0000256|ARBA:ARBA00023414};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=H(+) + malonyl-[ACP] + tetradecanoyl-[ACP] = 3-
CC oxohexadecanoyl-[ACP] + CO2 + holo-[ACP]; Xref=Rhea:RHEA:41900,
CC Rhea:RHEA-COMP:9623, Rhea:RHEA-COMP:9648, Rhea:RHEA-COMP:9649,
CC Rhea:RHEA-COMP:9685, ChEBI:CHEBI:15378, ChEBI:CHEBI:16526,
CC ChEBI:CHEBI:64479, ChEBI:CHEBI:78449, ChEBI:CHEBI:78477,
CC ChEBI:CHEBI:78478; Evidence={ECO:0000256|ARBA:ARBA00023341};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41901;
CC Evidence={ECO:0000256|ARBA:ARBA00023341};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a fatty acyl-[ACP] + H(+) + malonyl-[ACP] = a 3-oxoacyl-[ACP]
CC + CO2 + holo-[ACP]; Xref=Rhea:RHEA:22836, Rhea:RHEA-COMP:9623,
CC Rhea:RHEA-COMP:9685, Rhea:RHEA-COMP:9916, Rhea:RHEA-COMP:14125,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:64479,
CC ChEBI:CHEBI:78449, ChEBI:CHEBI:78776, ChEBI:CHEBI:138651;
CC EC=2.3.1.41; Evidence={ECO:0000256|ARBA:ARBA00023389};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:22837;
CC Evidence={ECO:0000256|ARBA:ARBA00023389};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=butanoyl-[ACP] + H(+) + malonyl-[ACP] = 3-oxohexanoyl-[ACP] +
CC CO2 + holo-[ACP]; Xref=Rhea:RHEA:41820, Rhea:RHEA-COMP:9623,
CC Rhea:RHEA-COMP:9628, Rhea:RHEA-COMP:9629, Rhea:RHEA-COMP:9685,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:64479,
CC ChEBI:CHEBI:78449, ChEBI:CHEBI:78454, ChEBI:CHEBI:78456;
CC Evidence={ECO:0000256|ARBA:ARBA00023403};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41821;
CC Evidence={ECO:0000256|ARBA:ARBA00023403};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=decanoyl-[ACP] + H(+) + malonyl-[ACP] = 3-oxododecanoyl-[ACP]
CC + CO2 + holo-[ACP]; Xref=Rhea:RHEA:41868, Rhea:RHEA-COMP:9623,
CC Rhea:RHEA-COMP:9640, Rhea:RHEA-COMP:9641, Rhea:RHEA-COMP:9685,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:64479,
CC ChEBI:CHEBI:78449, ChEBI:CHEBI:78468, ChEBI:CHEBI:78469;
CC Evidence={ECO:0000256|ARBA:ARBA00023396};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41869;
CC Evidence={ECO:0000256|ARBA:ARBA00023396};
CC -!- CATALYTIC ACTIVITY:
CC Reaction=dodecanoyl-[ACP] + H(+) + malonyl-[ACP] = 3-oxotetradecanoyl-
CC [ACP] + CO2 + holo-[ACP]; Xref=Rhea:RHEA:41884, Rhea:RHEA-COMP:9623,
CC Rhea:RHEA-COMP:9644, Rhea:RHEA-COMP:9645, Rhea:RHEA-COMP:9685,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:16526, ChEBI:CHEBI:64479,
CC ChEBI:CHEBI:65264, ChEBI:CHEBI:78449, ChEBI:CHEBI:78473;
CC Evidence={ECO:0000256|ARBA:ARBA00023348};
CC PhysiologicalDirection=left-to-right; Xref=Rhea:RHEA:41885;
CC Evidence={ECO:0000256|ARBA:ARBA00023348};
CC -!- PATHWAY: Lipid metabolism; fatty acid biosynthesis.
CC {ECO:0000256|ARBA:ARBA00005194}.
CC -!- SIMILARITY: Belongs to the thiolase-like superfamily. Beta-ketoacyl-ACP
CC synthases family. {ECO:0000256|ARBA:ARBA00008467,
CC ECO:0000256|PIRNR:PIRNR000447, ECO:0000256|RuleBase:RU003694}.
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DR EMBL; CP000815; ACB42905.1; -; Genomic_DNA.
DR RefSeq; YP_002049115.1; NC_011087.1.
DR AlphaFoldDB; B1X4N6; -.
DR GeneID; 6481886; -.
DR GO; GO:0009536; C:plastid; IEA:UniProtKB-KW.
DR GO; GO:0004315; F:3-oxoacyl-[acyl-carrier-protein] synthase activity; IEA:InterPro.
DR GO; GO:0006633; P:fatty acid biosynthetic process; IEA:UniProtKB-KW.
DR CDD; cd00834; KAS_I_II; 1.
DR Gene3D; 3.40.47.10; -; 1.
DR InterPro; IPR017568; 3-oxoacyl-ACP_synth-2.
DR InterPro; IPR000794; Beta-ketoacyl_synthase.
DR InterPro; IPR018201; Ketoacyl_synth_AS.
DR InterPro; IPR014031; Ketoacyl_synth_C.
DR InterPro; IPR014030; Ketoacyl_synth_N.
DR InterPro; IPR020841; PKS_Beta-ketoAc_synthase_dom.
DR InterPro; IPR016039; Thiolase-like.
DR NCBIfam; TIGR03150; fabF; 1.
DR PANTHER; PTHR11712:SF336; 3-OXOACYL-[ACYL-CARRIER-PROTEIN] SYNTHASE, MITOCHONDRIAL; 1.
DR PANTHER; PTHR11712; POLYKETIDE SYNTHASE-RELATED; 1.
DR Pfam; PF00109; ketoacyl-synt; 1.
DR Pfam; PF02801; Ketoacyl-synt_C; 1.
DR PIRSF; PIRSF000447; KAS_II; 1.
DR SMART; SM00825; PKS_KS; 1.
DR SUPFAM; SSF53901; Thiolase-like; 2.
DR PROSITE; PS00606; KS3_1; 1.
DR PROSITE; PS52004; KS3_2; 1.
PE 3: Inferred from homology;
KW Acyltransferase {ECO:0000256|ARBA:ARBA00023315};
KW Fatty acid biosynthesis {ECO:0000256|ARBA:ARBA00023160,
KW ECO:0000256|PIRNR:PIRNR000447};
KW Fatty acid metabolism {ECO:0000256|ARBA:ARBA00022832};
KW Lipid biosynthesis {ECO:0000256|ARBA:ARBA00022516,
KW ECO:0000256|PIRNR:PIRNR000447};
KW Lipid metabolism {ECO:0000256|ARBA:ARBA00023098};
KW Plastid {ECO:0000313|EMBL:ACB42905.1};
KW Transferase {ECO:0000256|PIRNR:PIRNR000447, ECO:0000256|RuleBase:RU003694}.
FT DOMAIN 5..413
FT /note="Ketosynthase family 3 (KS3)"
FT /evidence="ECO:0000259|PROSITE:PS52004"
FT ACT_SITE 166
FT /note="For beta-ketoacyl synthase activity"
FT /evidence="ECO:0000256|PIRSR:PIRSR000447-1"
SQ SEQUENCE 415 AA; 43327 MW; 097DDB36E3D346AD CRC64;
MVEGLHRVVV TGLGAVTPIG NTVSDYWEGL STAKNGVSPI TLFDATHHSC RFAAEVKDFD
ITSLVNLKDS KRWDRFCQFG VVAAKQAVND ANLYIDETNA SRVGVAIGSG VGGLLMMETQ
VHVLNERGPD RVSPFCVPMM IPNMVAGLTA ITLGAKGPSI STSTACAAGS NAIGDAFRVL
QLGKADVMIC GGSESAITPL ALAGFASAKA LSLRNDNPAA ASRPFDAERN GFVIGEGAGM
LVMETLDHAR ARGAKILAEM IGYGATCDAY HITLPAPEGI GGCKAILLAL ADGSIAAPEV
DYINAHGTST FANDKNETAA IKSALGNHAY RIPISSTKSM TGHLLGGSGG IEAVACILAI
RHNLAPPTIN YKNSDPLCDL DYVPNEAREY KIKVALSNSF GFGGHNVCLA FRQMT
//
