ID   LPXB_NITWN              Reviewed;         396 AA.
AC   Q3SRI5;
DT   31-OCT-2006, integrated into UniProtKB/Swiss-Prot.
DT   11-OCT-2005, sequence version 1.
DT   27-MAR-2024, entry version 101.
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=Nwi_1846;
OS   Nitrobacter winogradskyi (strain ATCC 25391 / DSM 10237 / CIP 104748 /
OS   NCIMB 11846 / Nb-255).
OC   Bacteria; Pseudomonadota; Alphaproteobacteria; Hyphomicrobiales;
OC   Nitrobacteraceae; Nitrobacter.
OX   NCBI_TaxID=323098;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 25391 / DSM 10237 / CIP 104748 / NCIMB 11846 / Nb-255;
RX   PubMed=16517654; DOI=10.1128/aem.72.3.2050-2063.2006;
RA   Starkenburg S.R., Chain P.S.G., Sayavedra-Soto L.A., Hauser L., Land M.L.,
RA   Larimer F.W., Malfatti S.A., Klotz M.G., Bottomley P.J., Arp D.J.,
RA   Hickey W.J.;
RT   "Genome sequence of the chemolithoautotrophic nitrite-oxidizing bacterium
RT   Nitrobacter winogradskyi Nb-255.";
RL   Appl. Environ. Microbiol. 72:2050-2063(2006).
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=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: Bacterial outer membrane biogenesis; LPS lipid A biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_00392}.
CC   -!- SIMILARITY: Belongs to the LpxB family. {ECO:0000255|HAMAP-
CC       Rule:MF_00392}.
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DR   EMBL; CP000115; ABA05106.1; -; Genomic_DNA.
DR   RefSeq; WP_011315102.1; NC_007406.1.
DR   AlphaFoldDB; Q3SRI5; -.
DR   SMR; Q3SRI5; -.
DR   STRING; 323098.Nwi_1846; -.
DR   CAZy; GT19; Glycosyltransferase Family 19.
DR   KEGG; nwi:Nwi_1846; -.
DR   eggNOG; COG0763; Bacteria.
DR   HOGENOM; CLU_036577_3_0_5; -.
DR   OrthoDB; 9801642at2; -.
DR   UniPathway; UPA00973; -.
DR   Proteomes; UP000002531; 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   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..396
FT                   /note="Lipid-A-disaccharide synthase"
FT                   /id="PRO_0000255202"
SQ   SEQUENCE   396 AA;  43640 MW;  BBDE4D4CFCE7CAD7 CRC64;
     MPDEASANPS RKIFLIATEE SGDRLGSSLM KALRRRLGCS VRFEGVGGQT MAREGLVSLF
     PIEELSIMGF TAVVKQLPMI VRRIRGTADA VIAAAPDVLV IIDSPDFTHR VARRVRARCR
     GLPIVDYVSP SVWAWRSGRA RAMRSYVDHV LALLPFEPEA YRRLGGPPCT YVGHPLLEQI
     GVLRPDAQER QRRDADPPTL LVLPGSRRSE IRHHLSVFGE TIGMLQQSIP EIEVVLPTTP
     HLVDEITPAV ATWPRRPRVV IGEDDKRAAF RVARAALAKS GTVTLELALA GVPMVAAYKA
     GSVEAWIARR VIRVSSVILA NLVIRENVIP EFLQEDCVPG KLAPALQEIL TDSPMRRRQL
     KAFDGLNTIM ATGQRSPSEL AADIVIEAMR ESRARM
//