ID   LPXB_ALKEH              Reviewed;         382 AA.
AC   Q0A7J2;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   17-OCT-2006, sequence version 1.
DT   27-MAR-2024, entry version 86.
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=Mlg_1851;
OS   Alkalilimnicola ehrlichii (strain ATCC BAA-1101 / DSM 17681 / MLHE-1).
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Chromatiales;
OC   Ectothiorhodospiraceae; Alkalilimnicola.
OX   NCBI_TaxID=187272;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-1101 / DSM 17681 / MLHE-1;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Sims D., Brettin T., Bruce D., Han C., Tapia R., Gilna P., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Mikhailova N., Oremland R.S.,
RA   Hoeft S.E., Switzer-Blum J., Kulp T., King G., Tabita R., Witte B.,
RA   Santini J.M., Basu P., Hollibaugh J.T., Xie G., Stolz J.F., Richardson P.;
RT   "Complete sequence of Alkalilimnicola ehrilichei MLHE-1.";
RL   Submitted (AUG-2006) to the EMBL/GenBank/DDBJ databases.
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; CP000453; ABI57195.1; -; Genomic_DNA.
DR   RefSeq; WP_011629589.1; NC_008340.1.
DR   AlphaFoldDB; Q0A7J2; -.
DR   SMR; Q0A7J2; -.
DR   CAZy; GT19; Glycosyltransferase Family 19.
DR   KEGG; aeh:Mlg_1851; -.
DR   eggNOG; COG0763; Bacteria.
DR   HOGENOM; CLU_036577_3_0_6; -.
DR   OrthoDB; 9801642at2; -.
DR   UniPathway; UPA00973; -.
DR   Proteomes; UP000001962; 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   Gene3D; 3.40.50.2000; Glycogen Phosphorylase B; 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..382
FT                   /note="Lipid-A-disaccharide synthase"
FT                   /id="PRO_1000049383"
SQ   SEQUENCE   382 AA;  41866 MW;  6C6A8414633175F4 CRC64;
     MRVALVAGEH SGDRLGAGLI RAIRARCPEA EFDGVGGPLM QAEGLRSHYP MEALSVMGLV
     EVLRHLPRLL RIRRDLVARY RTDPPDVFVG IDLPDFNLSI ERRLKAVGVP TVHYVSPQVW
     AWRQGRVRTI GRSVDRILAL YPFEAEFYRR HGVPVDFVGH PAADRFPLQP DAGAARAALG
     LVDDGGGPWV ALLPGSRLGE VQRHAELYAR TVARLRERQP DVRFIAPLAW PGLRAVFYEA
     LVQQGVSDAV QLFEGRADEV MAAADVVLTA SGTATLEAML LKRPMVVAYR LAPLTFWLMK
     RLVRVSHVSQ PNLLAGEGLV EEYLQDAATP DNLAYALYRL LNDEPRSAYL RARFAELHGT
     LRRGADGQAA AAVLAAAGGN GS
//