ID   LPXB_ECOLU              Reviewed;         382 AA.
AC   B7N849;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   10-FEB-2009, sequence version 1.
DT   25-MAY-2022, entry version 61.
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}; OrderedLocusNames=ECUMN_0179;
OS   Escherichia coli O17:K52:H18 (strain UMN026 / ExPEC).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=585056;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=UMN026 / ExPEC;
RX   PubMed=19165319; DOI=10.1371/journal.pgen.1000344;
RA   Touchon M., Hoede C., Tenaillon O., Barbe V., Baeriswyl S., Bidet P.,
RA   Bingen E., Bonacorsi S., Bouchier C., Bouvet O., Calteau A., Chiapello H.,
RA   Clermont O., Cruveiller S., Danchin A., Diard M., Dossat C., Karoui M.E.,
RA   Frapy E., Garry L., Ghigo J.M., Gilles A.M., Johnson J., Le Bouguenec C.,
RA   Lescat M., Mangenot S., Martinez-Jehanne V., Matic I., Nassif X., Oztas S.,
RA   Petit M.A., Pichon C., Rouy Z., Ruf C.S., Schneider D., Tourret J.,
RA   Vacherie B., Vallenet D., Medigue C., Rocha E.P.C., Denamur E.;
RT   "Organised genome dynamics in the Escherichia coli species results in
RT   highly diverse adaptive paths.";
RL   PLoS Genet. 5:E1000344-E1000344(2009).
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; CU928163; CAR11399.1; -; Genomic_DNA.
DR   RefSeq; WP_000139685.1; NC_011751.1.
DR   RefSeq; YP_002410955.1; NC_011751.1.
DR   AlphaFoldDB; B7N849; -.
DR   SMR; B7N849; -.
DR   STRING; 585056.ECUMN_0179; -.
DR   CAZy; GT19; Glycosyltransferase Family 19.
DR   EnsemblBacteria; CAR11399; CAR11399; ECUMN_0179.
DR   KEGG; eum:ECUMN_0179; -.
DR   PATRIC; fig|585056.7.peg.373; -.
DR   HOGENOM; CLU_036577_3_0_6; -.
DR   OMA; PTVWAWR; -.
DR   UniPathway; UPA00359; UER00481.
DR   Proteomes; UP000007097; 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   HAMAP; MF_00392; LpxB; 1.
DR   InterPro; IPR003835; Glyco_trans_19.
DR   PANTHER; PTHR30372; PTHR30372; 1.
DR   Pfam; PF02684; LpxB; 1.
DR   TIGRFAMs; TIGR00215; lpxB; 1.
PE   3: Inferred from homology;
KW   Glycosyltransferase; Lipid A biosynthesis; Lipid biosynthesis;
KW   Lipid metabolism; Transferase.
FT   CHAIN           1..382
FT                   /note="Lipid-A-disaccharide synthase"
FT                   /id="PRO_1000191480"
SQ   SEQUENCE   382 AA;  42360 MW;  2D9A8398E241BC16 CRC64;
     MTEQRPLTIA LVAGETSGDI LGAGLIRALK ERVPNARFVG VAGPRMQAEG CEAWYEMEEL
     AVMGIVEVLG RLRRLLHIRA DLTTRFGELK PDVFVGIDAP DFNITLEGNL KKQGIKTIHY
     VSPSVWAWRQ KRVFKIGRAT DLVLAFLPFE KAFYDKYNVP CRFIGHTMAD AMPLDPDKNG
     ARDVLGIPHD AHCLALLPGS RGAEVEMLSA DFLKTAQLLR QTYPDLEIVV PLVNAKRREQ
     FERIKAEVAP DLSVHMLDGL GREAMVASDA ALLASGTAAL ECMLAKCPMV VGYRMKPFTF
     WLAKRLVKTD YVSLPNLLAG RELVKELLQE ECEPQKLAAA LLPLLANGKT SHAMHDTFRE
     LHQQIRCNAD EQAAQAVLEL AQ