ID   LPXB_PHOLL              Reviewed;         389 AA.
AC   Q7N8N4;
DT   15-DEC-2003, integrated into UniProtKB/Swiss-Prot.
DT   15-DEC-2003, sequence version 1.
DT   27-MAR-2024, entry version 93.
DE   RecName: Full=Lipid-A-disaccharide synthase {ECO:0000255|HAMAP-Rule:MF_00392};
DE            EC=2.4.1.182 {ECO:0000255|HAMAP-Rule:MF_00392};
GN   Name=lpxB {ECO:0000255|HAMAP-Rule:MF_00392};
GN   OrderedLocusNames=plu0685;
OS   Photorhabdus laumondii subsp. laumondii (strain DSM 15139 / CIP 105565 /
OS   TT01) (Photorhabdus luminescens subsp. laumondii).
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC   Morganellaceae; Photorhabdus.
OX   NCBI_TaxID=243265;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 15139 / CIP 105565 / TT01;
RX   PubMed=14528314; DOI=10.1038/nbt886;
RA   Duchaud E., Rusniok C., Frangeul L., Buchrieser C., Givaudan A.,
RA   Taourit S., Bocs S., Boursaux-Eude C., Chandler M., Charles J.-F.,
RA   Dassa E., Derose R., Derzelle S., Freyssinet G., Gaudriault S., Medigue C.,
RA   Lanois A., Powell K., Siguier P., Vincent R., Wingate V., Zouine M.,
RA   Glaser P., Boemare N., Danchin A., Kunst F.;
RT   "The genome sequence of the entomopathogenic bacterium Photorhabdus
RT   luminescens.";
RL   Nat. Biotechnol. 21:1307-1313(2003).
CC   -!- FUNCTION: Condensation of UDP-2,3-diacylglucosamine and 2,3-
CC       diacylglucosamine-1-phosphate to form lipid A disaccharide, a precursor
CC       of lipid A, a phosphorylated glycolipid that anchors the
CC       lipopolysaccharide to the outer membrane of the cell.
CC       {ECO:0000255|HAMAP-Rule:MF_00392}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2-N,3-O-bis[(3R)-3-hydroxytetradecanoyl]-alpha-D-glucosaminyl
CC         1-phosphate + UDP-2-N,3-O-bis[(3R)-3-hydroxytetradecanoyl]-alpha-D-
CC         glucosamine = H(+) + lipid A disaccharide (E. coli) + UDP;
CC         Xref=Rhea:RHEA:22668, ChEBI:CHEBI:15378, ChEBI:CHEBI:57957,
CC         ChEBI:CHEBI:58223, ChEBI:CHEBI:58466, ChEBI:CHEBI:78847;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00392};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=a lipid X + a UDP-2-N,3-O-bis[(3R)-3-hydroxyacyl]-alpha-D-
CC         glucosamine = a lipid A disaccharide + H(+) + UDP;
CC         Xref=Rhea:RHEA:67828, ChEBI:CHEBI:15378, ChEBI:CHEBI:58223,
CC         ChEBI:CHEBI:137748, ChEBI:CHEBI:176338, ChEBI:CHEBI:176343;
CC         EC=2.4.1.182; Evidence={ECO:0000255|HAMAP-Rule:MF_00392};
CC   -!- PATHWAY: Glycolipid biosynthesis; lipid IV(A) biosynthesis; lipid IV(A)
CC       from (3R)-3-hydroxytetradecanoyl-[acyl-carrier-protein] and UDP-N-
CC       acetyl-alpha-D-glucosamine: step 5/6. {ECO:0000255|HAMAP-
CC       Rule:MF_00392}.
CC   -!- SIMILARITY: Belongs to the LpxB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00392}.
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DR   EMBL; BX571861; CAE12980.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q7N8N4; -.
DR   SMR; Q7N8N4; -.
DR   STRING; 243265.plu0685; -.
DR   CAZy; GT19; Glycosyltransferase Family 19.
DR   KEGG; plu:plu0685; -.
DR   eggNOG; COG0763; Bacteria.
DR   HOGENOM; CLU_036577_3_0_6; -.
DR   UniPathway; UPA00359; UER00481.
DR   Proteomes; UP000002514; Chromosome.
DR   GO; GO:0008915; F:lipid-A-disaccharide synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0009245; P:lipid A biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd01635; Glycosyltransferase_GTB-type; 1.
DR   HAMAP; MF_00392; LpxB; 1.
DR   InterPro; IPR003835; Glyco_trans_19.
DR   NCBIfam; TIGR00215; lpxB; 1.
DR   PANTHER; PTHR30372; LIPID-A-DISACCHARIDE SYNTHASE; 1.
DR   PANTHER; PTHR30372:SF7; LIPID-A-DISACCHARIDE SYNTHASE; 1.
DR   Pfam; PF02684; LpxB; 1.
DR   SUPFAM; SSF53756; UDP-Glycosyltransferase/glycogen phosphorylase; 1.
PE   3: Inferred from homology;
KW   Glycosyltransferase; Lipid A biosynthesis; Lipid biosynthesis;
KW   Lipid metabolism; Reference proteome; Transferase.
FT   CHAIN           1..389
FT                   /note="Lipid-A-disaccharide synthase"
FT                   /id="PRO_0000190174"
SQ   SEQUENCE   389 AA;  43122 MW;  9A5984F63DCA842E CRC64;
     MATISSIDSL RPLTIGLIAG ETSGDILGAG LIRALKAKVP NARFVGVAGP LMQAEGCEAW
     YEMEELAVMG IVEVLGRLPR LLKIRKDLTT RFTELKPDVF VGIDAPDFNI TLEGRLKQRG
     IRTIHYVSPS VWAWRQKRVF KIGKATDMVL AFLPFEKAFY DKFNVPCRFI GHTMADAMPL
     QPNKATAREL LGILPESVCL ALLPGSRHSE VEMLSADFLK TAQLLKRNIP DLHVFVPLVN
     AKRREQFERI KQEVAPELNV HLVDGKAREI MIASDAALLA SGTAALECML AKCPMVVGYR
     MKPLTFWLAK RLVKTPYVSL PNLLSGEELV KELLQEKCQP QKLADELLPL LQGSEKVGAL
     KQTFLHLHKS IRCNADEQAA QAVLELAGK
//