ID   LPXB_RUEPO              Reviewed;         401 AA.
AC   Q5LSU1;
DT   31-OCT-2006, integrated into UniProtKB/Swiss-Prot.
DT   01-FEB-2005, sequence version 1.
DT   25-MAY-2022, entry version 84.
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=SPO1675;
OS   Ruegeria pomeroyi (strain ATCC 700808 / DSM 15171 / DSS-3) (Silicibacter
OS   pomeroyi).
OC   Bacteria; Proteobacteria; Alphaproteobacteria; Rhodobacterales;
OC   Roseobacteraceae; Ruegeria.
OX   NCBI_TaxID=246200;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 700808 / DSM 15171 / DSS-3;
RX   PubMed=15602564; DOI=10.1038/nature03170;
RA   Moran M.A., Buchan A., Gonzalez J.M., Heidelberg J.F., Whitman W.B.,
RA   Kiene R.P., Henriksen J.R., King G.M., Belas R., Fuqua C., Brinkac L.M.,
RA   Lewis M., Johri S., Weaver B., Pai G., Eisen J.A., Rahe E., Sheldon W.M.,
RA   Ye W., Miller T.R., Carlton J., Rasko D.A., Paulsen I.T., Ren Q.,
RA   Daugherty S.C., DeBoy R.T., Dodson R.J., Durkin A.S., Madupu R.,
RA   Nelson W.C., Sullivan S.A., Rosovitz M.J., Haft D.H., Selengut J., Ward N.;
RT   "Genome sequence of Silicibacter pomeroyi reveals adaptations to the marine
RT   environment.";
RL   Nature 432:910-913(2004).
RN   [2]
RP   GENOME REANNOTATION.
RC   STRAIN=ATCC 700808 / DSM 15171 / DSS-3;
RX   PubMed=25780504; DOI=10.1186/1944-3277-9-11;
RA   Rivers A.R., Smith C.B., Moran M.A.;
RT   "An updated genome annotation for the model marine bacterium Ruegeria
RT   pomeroyi DSS-3.";
RL   Stand. Genomic Sci. 9:11-11(2014).
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; CP000031; AAV94960.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q5LSU1; -.
DR   SMR; Q5LSU1; -.
DR   STRING; 246200.SPO1675; -.
DR   CAZy; GT19; Glycosyltransferase Family 19.
DR   EnsemblBacteria; AAV94960; AAV94960; SPO1675.
DR   KEGG; sil:SPO1675; -.
DR   eggNOG; COG0763; Bacteria.
DR   HOGENOM; CLU_036577_3_0_5; -.
DR   OMA; PTVWAWR; -.
DR   UniPathway; UPA00973; -.
DR   Proteomes; UP000001023; 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; Reference proteome; Transferase.
FT   CHAIN           1..401
FT                   /note="Lipid-A-disaccharide synthase"
FT                   /id="PRO_0000255226"
SQ   SEQUENCE   401 AA;  42664 MW;  AAE8DB2FA164182D CRC64;
     MRPAGPVPVC CRAGRLMRVF ILAGEPSGDR LGGALMAGLR QLCPDVQFDG VGGPAMESEG
     LSSRFPMAEL SIMGLVEVLP KYFHLKRRIA ETAQAVLAMR PDVMITIDSP DFSLRVARLV
     KDASDIRTVH YVAPSVWAWR PGRADKMAKV IDHVLALLPF EPPYMERAGM ECDFVGHPVV
     TEPEATGADI AALRTELGLG AAPVLLALPG SRRGEVERLA PVFGAALRRF LPEHPDMRVV
     VPVVPHVADQ VAQQVAEWPG APVLVDPRGL APAQAAMRKR AAFAAADLAL AASGTVSLEL
     AAAGTPMVIA YKVNWLTQKI AERMVTIDTV TLVNLVSETR VVPECLGPAC TPENIAARLA
     AVHADPAAQD AAMRLTMERL GRGGTPPGLR AAQAVLDRLP G