ID   LPXB_SACD2              Reviewed;         388 AA.
AC   Q21HI5;
DT   31-OCT-2006, integrated into UniProtKB/Swiss-Prot.
DT   18-APR-2006, sequence version 1.
DT   27-MAR-2024, entry version 83.
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=Sde_2584;
OS   Saccharophagus degradans (strain 2-40 / ATCC 43961 / DSM 17024).
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Cellvibrionales;
OC   Cellvibrionaceae; Saccharophagus.
OX   NCBI_TaxID=203122;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=2-40 / ATCC 43961 / DSM 17024;
RX   PubMed=18516288; DOI=10.1371/journal.pgen.1000087;
RA   Weiner R.M., Taylor L.E. II, Henrissat B., Hauser L., Land M.,
RA   Coutinho P.M., Rancurel C., Saunders E.H., Longmire A.G., Zhang H.,
RA   Bayer E.A., Gilbert H.J., Larimer F., Zhulin I.B., Ekborg N.A., Lamed R.,
RA   Richardson P.M., Borovok I., Hutcheson S.;
RT   "Complete genome sequence of the complex carbohydrate-degrading marine
RT   bacterium, Saccharophagus degradans strain 2-40 T.";
RL   PLoS Genet. 4:E1000087-E1000087(2008).
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; CP000282; ABD81844.1; -; Genomic_DNA.
DR   RefSeq; WP_011469061.1; NC_007912.1.
DR   AlphaFoldDB; Q21HI5; -.
DR   SMR; Q21HI5; -.
DR   STRING; 203122.Sde_2584; -.
DR   CAZy; GT19; Glycosyltransferase Family 19.
DR   KEGG; sde:Sde_2584; -.
DR   eggNOG; COG0763; Bacteria.
DR   HOGENOM; CLU_036577_3_0_6; -.
DR   OrthoDB; 9801642at2; -.
DR   UniPathway; UPA00973; -.
DR   Proteomes; UP000001947; 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..388
FT                   /note="Lipid-A-disaccharide synthase"
FT                   /id="PRO_0000255220"
SQ   SEQUENCE   388 AA;  42934 MW;  AC341C9DF3A03F65 CRC64;
     MSSLKRVAIV VGEASGDILG AGLMAALKKR YPDCEFEGIG GPKMLALGFN SLYQMDRLAV
     MGFVEPLKRL PELLGIRKSL RQRYLTNPPD VFIGIDAPDF NLNLEVNLRE AGVPVVHYVS
     PSVWAWRRGR LKKIAKAVDL MLTLFPFESS FFNEQNIPNL FVGHPLADTI PLENEKTGAR
     ERLGLSAENN ERWVALLPGS RGGEVEHLCE RFLLAAQQSF AGRPNLRIII PAANDARHSQ
     ISEVLKRYSE LPVTLLHGQS HDAMLAADAI LIASGTATLE AMLLKRPMVI AYHMAAFSYW
     LLSKLVKSKF VGLPNLLADK ELVPELLQHN ATPSQLSAAL NVYLDSEKTT QQLIEQFNAI
     HLQLRRDASE TAAQGIVDML AAKRDIAR
//