ID   LPXB_BLOFL              Reviewed;         384 AA.
AC   Q7VRD3;
DT   15-DEC-2003, integrated into UniProtKB/Swiss-Prot.
DT   01-OCT-2003, sequence version 1.
DT   27-MAR-2024, entry version 89.
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=Bfl284;
OS   Blochmannia floridanus.
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; ant endosymbionts; Blochmannia.
OX   NCBI_TaxID=203907;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX   PubMed=12886019; DOI=10.1073/pnas.1533499100;
RA   Gil R., Silva F.J., Zientz E., Delmotte F., Gonzalez-Candelas F.,
RA   Latorre A., Rausell C., Kamerbeek J., Gadau J., Hoelldobler B.,
RA   van Ham R.C.H.J., Gross R., Moya A.;
RT   "The genome sequence of Blochmannia floridanus: comparative analysis of
RT   reduced genomes.";
RL   Proc. Natl. Acad. Sci. U.S.A. 100:9388-9393(2003).
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; BX248583; CAD83355.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q7VRD3; -.
DR   SMR; Q7VRD3; -.
DR   STRING; 203907.Bfl284; -.
DR   CAZy; GT19; Glycosyltransferase Family 19.
DR   KEGG; bfl:Bfl284; -.
DR   eggNOG; COG0763; Bacteria.
DR   HOGENOM; CLU_036577_3_0_6; -.
DR   OrthoDB; 9801642at2; -.
DR   UniPathway; UPA00359; UER00481.
DR   Proteomes; UP000002192; 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   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; Transferase.
FT   CHAIN           1..384
FT                   /note="Lipid-A-disaccharide synthase"
FT                   /id="PRO_0000190157"
SQ   SEQUENCE   384 AA;  44187 MW;  7FE83D581B23F144 CRC64;
     MINNRSVIIG IVVGENSGDI LGVGLIRSLK KCFKKVQFFG IGGFRMRSEN MECWYDISEL
     SIMGITGVIF RLPKLLNMRR ELIKRFLKLK LNIFIGIDFP DFNISLEKRL KKYGITTIHY
     VSPSIWAWRS NRVFALKEAT HNVLLLFPFE KSIYARCGIP NQFIGHPLAD EIPLYPNKIA
     LRQKFDIPSN RCCLAILPGS RPKEIQILTK IFMHCAKLLQ DTIPNLEILI PLHDTDLINQ
     FVTLTSFISV KFRVLHTLTA WEVMAAADAA LLTSGTATLE CMLAKCPMVV AYRMNPVIFM
     LIRHLIKVKW ISLPNLLAGK PIVQEFIQKK CDPQRLASSL FYLLNYNQEQ RTTLQQEFYH
     LHRSIKLHAN DQATRLILKY INLL
//