FABG_BUCAP
ID FABG_BUCAP Reviewed; 244 AA.
AC Q8K9J5;
DT 15-NOV-2002, integrated into UniProtKB/Swiss-Prot.
DT 01-OCT-2002, sequence version 1.
DT 03-AUG-2022, entry version 120.
DE RecName: Full=3-oxoacyl-[acyl-carrier-protein] reductase FabG;
DE EC=1.1.1.100;
DE AltName: Full=3-ketoacyl-acyl carrier protein reductase;
DE AltName: Full=Beta-Ketoacyl-acyl carrier protein reductase;
DE AltName: Full=Beta-ketoacyl-ACP reductase;
GN Name=fabG; OrderedLocusNames=BUsg_339;
OS Buchnera aphidicola subsp. Schizaphis graminum (strain Sg).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC Erwiniaceae; Buchnera.
OX NCBI_TaxID=198804;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=Sg;
RX PubMed=12089438; DOI=10.1126/science.1071278;
RA Tamas I., Klasson L., Canbaeck B., Naeslund A.K., Eriksson A.-S.,
RA Wernegreen J.J., Sandstroem J.P., Moran N.A., Andersson S.G.E.;
RT "50 million years of genomic stasis in endosymbiotic bacteria.";
RL Science 296:2376-2379(2002).
CC -!- FUNCTION: Catalyzes the NADPH-dependent reduction of beta-ketoacyl-ACP
CC substrates to beta-hydroxyacyl-ACP products, the first reductive step
CC in the elongation cycle of fatty acid biosynthesis. {ECO:0000250}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=a (3R)-hydroxyacyl-[ACP] + NADP(+) = a 3-oxoacyl-[ACP] + H(+)
CC + NADPH; Xref=Rhea:RHEA:17397, Rhea:RHEA-COMP:9916, Rhea:RHEA-
CC COMP:9945, ChEBI:CHEBI:15378, ChEBI:CHEBI:57783, ChEBI:CHEBI:58349,
CC ChEBI:CHEBI:78776, ChEBI:CHEBI:78827; EC=1.1.1.100;
CC -!- PATHWAY: Lipid metabolism; fatty acid biosynthesis.
CC -!- SUBUNIT: Homotetramer. {ECO:0000250}.
CC -!- MISCELLANEOUS: Calcium ions stabilize the structure, and may inhibit
CC FabG activity by obstructing access to the active site. {ECO:0000250}.
CC -!- SIMILARITY: Belongs to the short-chain dehydrogenases/reductases (SDR)
CC family. {ECO:0000305}.
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DR EMBL; AE013218; AAM67893.1; -; Genomic_DNA.
DR RefSeq; WP_011053860.1; NC_004061.1.
DR AlphaFoldDB; Q8K9J5; -.
DR SMR; Q8K9J5; -.
DR STRING; 198804.BUsg_339; -.
DR EnsemblBacteria; AAM67893; AAM67893; BUsg_339.
DR KEGG; bas:BUsg_339; -.
DR eggNOG; COG1028; Bacteria.
DR HOGENOM; CLU_010194_1_3_6; -.
DR OMA; KHMVDAG; -.
DR OrthoDB; 1601931at2; -.
DR UniPathway; UPA00094; -.
DR Proteomes; UP000000416; Chromosome.
DR GO; GO:0004316; F:3-oxoacyl-[acyl-carrier-protein] reductase (NADPH) activity; IEA:UniProtKB-EC.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0051287; F:NAD binding; IEA:InterPro.
DR GO; GO:0006633; P:fatty acid biosynthetic process; IEA:UniProtKB-UniPathway.
DR InterPro; IPR011284; 3oxo_ACP_reduc.
DR InterPro; IPR036291; NAD(P)-bd_dom_sf.
DR InterPro; IPR020904; Sc_DH/Rdtase_CS.
DR InterPro; IPR002347; SDR_fam.
DR PRINTS; PR00081; GDHRDH.
DR PRINTS; PR00080; SDRFAMILY.
DR SUPFAM; SSF51735; SSF51735; 1.
DR TIGRFAMs; TIGR01830; 3oxo_ACP_reduc; 1.
DR PROSITE; PS00061; ADH_SHORT; 1.
PE 3: Inferred from homology;
KW Calcium; Fatty acid biosynthesis; Fatty acid metabolism;
KW Lipid biosynthesis; Lipid metabolism; Metal-binding; NADP; Oxidoreductase.
FT CHAIN 1..244
FT /note="3-oxoacyl-[acyl-carrier-protein] reductase FabG"
FT /id="PRO_0000054667"
FT ACT_SITE 151
FT /note="Proton acceptor"
FT /evidence="ECO:0000255|PROSITE-ProRule:PRU10001"
FT BINDING 12..15
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000250"
FT BINDING 37
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000250"
FT BINDING 50
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /ligand_note="ligand shared between dimeric partners"
FT /evidence="ECO:0000250"
FT BINDING 53
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="1"
FT /ligand_note="ligand shared between dimeric partners"
FT /evidence="ECO:0000250"
FT BINDING 59..60
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000250"
FT BINDING 86
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000250"
FT BINDING 138
FT /ligand="substrate"
FT /evidence="ECO:0000250"
FT BINDING 145
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="2"
FT /evidence="ECO:0000250"
FT BINDING 151..155
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000250"
FT BINDING 184
FT /ligand="NADP(+)"
FT /ligand_id="ChEBI:CHEBI:58349"
FT /evidence="ECO:0000250"
FT BINDING 233
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="3"
FT /ligand_note="ligand shared between dimeric partners"
FT /evidence="ECO:0000250"
FT BINDING 234
FT /ligand="Ca(2+)"
FT /ligand_id="ChEBI:CHEBI:29108"
FT /ligand_label="3"
FT /ligand_note="ligand shared between dimeric partners"
FT /evidence="ECO:0000250"
SQ SEQUENCE 244 AA; 26939 MW; 14526C91CDC54D5A CRC64;
MKIEKKTALV TGANQGLGKE IAIKLSQKGI QVIGTSTTVD GVKTINKYLK KNGFGFILDL
KDTDSILEKM KEICQKKYSI DILINNAGIT SDNLLVYMSN KEWENVIKIN LTSVFYMSKS
VIRSMIKKRY GRIVTIGSVI GYLGNRGQIN YSASKSGLIG FHKSLALEVA QKGITVNIVS
PGFIKTNLTK NLNVFQYKKH LSKIPMKRIG TAEEIANAVI FLSSEKASYI TGQTIHVNGG
MYMT
