ID   LPXB_AROAE              Reviewed;         391 AA.
AC   Q5NZG2;
DT   31-OCT-2006, integrated into UniProtKB/Swiss-Prot.
DT   04-JAN-2005, sequence version 1.
DT   25-MAY-2022, 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}; OrderedLocusNames=AZOSEA34270;
GN   ORFNames=ebA6002;
OS   Aromatoleum aromaticum (strain EbN1) (Azoarcus sp. (strain EbN1)).
OC   Bacteria; Proteobacteria; Betaproteobacteria; Rhodocyclales;
OC   Rhodocyclaceae; Aromatoleum.
OX   NCBI_TaxID=76114;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=EbN1;
RX   PubMed=15551059; DOI=10.1007/s00203-004-0742-9;
RA   Rabus R., Kube M., Heider J., Beck A., Heitmann K., Widdel F.,
RA   Reinhardt R.;
RT   "The genome sequence of an anaerobic aromatic-degrading denitrifying
RT   bacterium, strain EbN1.";
RL   Arch. Microbiol. 183:27-36(2005).
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; CR555306; CAI09552.1; -; Genomic_DNA.
DR   RefSeq; WP_011239212.1; NC_006513.1.
DR   AlphaFoldDB; Q5NZG2; -.
DR   SMR; Q5NZG2; -.
DR   STRING; 76114.ebA6002; -.
DR   CAZy; GT19; Glycosyltransferase Family 19.
DR   EnsemblBacteria; CAI09552; CAI09552; ebA6002.
DR   KEGG; eba:ebA6002; -.
DR   eggNOG; COG0763; Bacteria.
DR   HOGENOM; CLU_036577_3_0_4; -.
DR   OMA; PTVWAWR; -.
DR   OrthoDB; 1258510at2; -.
DR   UniPathway; UPA00973; -.
DR   Proteomes; UP000006552; 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..391
FT                   /note="Lipid-A-disaccharide synthase"
FT                   /id="PRO_0000255160"
SQ   SEQUENCE   391 AA;  43120 MW;  A6607CA2A0110B54 CRC64;
     MATRIAMVAG EASGDLLASH LIRAIRQQVP EAEFYGIGGP KMQAEGFDAL WPCERLAVHG
     YVDALKRYRE LSGIRKALLR RVQADRPDAF IGVDAPDFNL WLEGRIRSSG IPAIHFVSPS
     IWAWRGGRIK GIARSVSHML CLFPFEPALY EKAGIPVSYV GHPLADVFPL VPDRAAAREL
     LSLPTDCRIV ALLPGSRQSE VRSLAATYIE TARLLAERHP DIGFVVPLAT RETRALFEQA
     LHAADADELP IRLLFGHAVE AMTAADVVLV ASGTASLEAA LLKRPMVISY RIGKWQYRLM
     KRMAYLPWVG LPNILCNDSV VPELLQDDAT PQALADALDR WLNDADACAE LALRFDALHR
     ELRQDTAGRA AAAILPYLNR SPEWKPSRQS A