FABH_NITEC
ID FABH_NITEC Reviewed; 320 AA.
AC Q0AIS4;
DT 15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT 17-OCT-2006, sequence version 1.
DT 25-MAY-2022, entry version 91.
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=Neut_0470;
OS Nitrosomonas eutropha (strain DSM 101675 / C91 / Nm57).
OC Bacteria; Proteobacteria; Betaproteobacteria; Nitrosomonadales;
OC Nitrosomonadaceae; Nitrosomonas.
OX NCBI_TaxID=335283;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 101675 / C91 / Nm57;
RX PubMed=17991028; DOI=10.1111/j.1462-2920.2007.01409.x;
RA Stein L.Y., Arp D.J., Berube P.M., Chain P.S., Hauser L., Jetten M.S.,
RA Klotz M.G., Larimer F.W., Norton J.M., Op den Camp H.J.M., Shin M., Wei X.;
RT "Whole-genome analysis of the ammonia-oxidizing bacterium, Nitrosomonas
RT eutropha C91: implications for niche adaptation.";
RL Environ. Microbiol. 9:2993-3007(2007).
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}.
CC ---------------------------------------------------------------------------
CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC ---------------------------------------------------------------------------
DR EMBL; CP000450; ABI58747.1; -; Genomic_DNA.
DR AlphaFoldDB; Q0AIS4; -.
DR SMR; Q0AIS4; -.
DR STRING; 335283.Neut_0470; -.
DR EnsemblBacteria; ABI58747; ABI58747; Neut_0470.
DR KEGG; net:Neut_0470; -.
DR eggNOG; COG0332; Bacteria.
DR HOGENOM; CLU_039592_3_1_4; -.
DR OMA; WGSEGDK; -.
DR UniPathway; UPA00094; -.
DR Proteomes; UP000001966; 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; -; 1.
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..320
FT /note="3-oxoacyl-[acyl-carrier-protein] synthase 3"
FT /id="PRO_1000056384"
FT REGION 248..252
FT /note="ACP-binding"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 114
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 247
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT ACT_SITE 277
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
SQ SEQUENCE 320 AA; 34038 MW; 67A812FC2D020398 CRC64;
MAMYSRIIGT GSYLPEKILT NLELESMVDT SDEWIQARTG IKQRHIAAPG QMASDLALEA
SRNAIEAAGI QASDIDLVIV ATTTPDMIFP STACILQNKL GISGSPAFDV QAVCSGFIYA
LATADMFVSS GKSRNALIVG SEVYSRIMDW NDRSTCVLFG DGAGAVVLTR DQKPGILSSH
LHADGSYSQV LSAPASIHSG KIQGTPFITM EGSTVFKFAV KVLEEAVLEA LHANDLQSSD
IDWLIPHQAN IRIITSTAKK LGIPEEKVVV TVTQHGNTSA ASVPLALDQA VRDGRVQSGQ
HVVLEGVGGG FTWGSVLVRW
