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FABH_BARHE
ID   FABH_BARHE              Reviewed;         324 AA.
AC   Q6G3K4;
DT   28-JUL-2009, integrated into UniProtKB/Swiss-Prot.
DT   19-JUL-2004, sequence version 1.
DT   25-MAY-2022, entry version 103.
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=BH07630;
OS   Bartonella henselae (strain ATCC 49882 / DSM 28221 / Houston 1)
OS   (Rochalimaea henselae).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Hyphomicrobiales;
OC   Bartonellaceae; Bartonella.
OX   NCBI_TaxID=283166;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 49882 / DSM 28221 / Houston 1;
RX   PubMed=15210978; DOI=10.1073/pnas.0305659101;
RA   Alsmark U.C.M., Frank A.C., Karlberg E.O., Legault B.-A., Ardell D.H.,
RA   Canbaeck B., Eriksson A.-S., Naeslund A.K., Handley S.A., Huvet M.,
RA   La Scola B., Holmberg M., Andersson S.G.E.;
RT   "The louse-borne human pathogen Bartonella quintana is a genomic derivative
RT   of the zoonotic agent Bartonella henselae.";
RL   Proc. Natl. Acad. Sci. U.S.A. 101:9716-9721(2004).
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; BX897699; CAF27564.1; -; Genomic_DNA.
DR   RefSeq; WP_011180665.1; NZ_LRIJ02000001.1.
DR   AlphaFoldDB; Q6G3K4; -.
DR   SMR; Q6G3K4; -.
DR   STRING; 283166.BH07630; -.
DR   PaxDb; Q6G3K4; -.
DR   PRIDE; Q6G3K4; -.
DR   EnsemblBacteria; CAF27564; CAF27564; BH07630.
DR   GeneID; 64157016; -.
DR   KEGG; bhe:BH07630; -.
DR   eggNOG; COG0332; Bacteria.
DR   OMA; WGSEGDK; -.
DR   UniPathway; UPA00094; -.
DR   Proteomes; UP000000421; 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..324
FT                   /note="3-oxoacyl-[acyl-carrier-protein] synthase 3"
FT                   /id="PRO_1000187842"
FT   REGION          252..256
FT                   /note="ACP-binding"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT   ACT_SITE        113
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT   ACT_SITE        251
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
FT   ACT_SITE        281
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01815"
SQ   SEQUENCE   324 AA;  34771 MW;  8BC3E428CA1EF466 CRC64;
     MIRSVVRGIG GALPKKSLSN DDIAKFVETS DSWIVQRTGI RQRYIANEKE TTVSLGVEAA
     QAALINAGLT IKDIDCIILA TSTPNHTFPA SAVEIQHALG MSHGFAFDIQ AVCSGFIFAL
     TTGDAYLRCG TAKRILVIGS DTFSRILDWQ DRTTCVLFGD GAGAAVLEAQ EIERGVASDH
     GILSTKLRSN GAYMDKLYVD GGPSTTQKTG YLRMEGREVF KYAVGMITDV VDECFAAAGM
     DSSQLDWFVP HQANKRIIEA SAKKLGISID KVVITVDRHG NTSAASVPLA LTMAICDGKI
     KKGDLVMLEA MGGGFTWGAI LIRW
 
 
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