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Protein

Lipid-A-disaccharide synthase

Gene

lpxB

Organism
Haemophilus influenzae (strain PittEE)
Status
Reviewed-Annotation score: Annotation score: 2 out of 5-Protein inferred from homologyi

Functioni

Condensation of UDP-2,3-diacylglucosamine and 2,3-diacylglucosamine-1-phosphate to form lipid A disaccharide, a precursor of lipid A, a phosphorylated glycolipid that anchors the lipopolysaccharide to the outer membrane of the cell.UniRule annotation

Catalytic activityi

UDP-2-N,3-O-bis((3R)-3-hydroxytetradecanoyl)-alpha-D-glucosamine + 2-N,3-O-bis((3R)-3-hydroxytetradecanoyl)-alpha-D-glucosaminyl 1-phosphate = UDP + 2-N,3-O-bis((3R)-3-hydroxytetradecanoyl)-beta-D-glucosaminyl-(1->6)-2-N,3-O-bis((3R)-3-hydroxytetradecanoyl)-alpha-D-glucosaminyl 1-phosphate.UniRule annotation

Pathway:ilipid IV(A) biosynthesis

This protein is involved in step 5 of the subpathway that synthesizes lipid IV(A) from (3R)-3-hydroxytetradecanoyl-[acyl-carrier-protein] and UDP-N-acetyl-alpha-D-glucosamine.UniRule annotation
Proteins known to be involved in the 6 steps of the subpathway in this organism are:
  1. Acyl-[acyl-carrier-protein]--UDP-N-acetylglucosamine O-acyltransferase (lpxA)
  2. UDP-3-O-[3-hydroxymyristoyl] N-acetylglucosamine deacetylase (lpxC)
  3. no protein annotated in this organism
  4. UDP-2,3-diacylglucosamine hydrolase (lpxH)
  5. Lipid-A-disaccharide synthase (lpxB)
  6. Tetraacyldisaccharide 4'-kinase (lpxK)
This subpathway is part of the pathway lipid IV(A) biosynthesis, which is itself part of Glycolipid biosynthesis.
View all proteins of this organism that are known to be involved in the subpathway that synthesizes lipid IV(A) from (3R)-3-hydroxytetradecanoyl-[acyl-carrier-protein] and UDP-N-acetyl-alpha-D-glucosamine, the pathway lipid IV(A) biosynthesis and in Glycolipid biosynthesis.

GO - Molecular functioni

GO - Biological processi

Complete GO annotation...

Keywords - Molecular functioni

Glycosyltransferase, Transferase

Keywords - Biological processi

Lipid A biosynthesis, Lipid biosynthesis, Lipid metabolism

Enzyme and pathway databases

BioCyciHINF374930:GJDD-1259-MONOMER.
UniPathwayiUPA00359; UER00481.

Protein family/group databases

CAZyiGT19. Glycosyltransferase Family 19.

Names & Taxonomyi

Protein namesi
Recommended name:
Lipid-A-disaccharide synthaseUniRule annotation (EC:2.4.1.182UniRule annotation)
Gene namesi
Name:lpxBUniRule annotation
Ordered Locus Names:CGSHiEE_06780
OrganismiHaemophilus influenzae (strain PittEE)
Taxonomic identifieri374930 [NCBI]
Taxonomic lineageiBacteriaProteobacteriaGammaproteobacteriaPasteurellalesPasteurellaceaeHaemophilus

PTM / Processingi

Molecule processing

Feature keyPosition(s)LengthDescriptionGraphical viewFeature identifierActions
Chaini1 – 390390Lipid-A-disaccharide synthasePRO_1000049400Add
BLAST

Structurei

3D structure databases

ProteinModelPortaliA5UD44.
ModBaseiSearch...
MobiDBiSearch...

Family & Domainsi

Sequence similaritiesi

Belongs to the LpxB family.UniRule annotation

Phylogenomic databases

eggNOGiCOG0763.
HOGENOMiHOG000018003.
KOiK00748.
OMAiYYIIAGE.
OrthoDBiEOG6FBWZR.

Family and domain databases

HAMAPiMF_00392. LpxB.
InterProiIPR003835. Glyco_trans_19.
[Graphical view]
PfamiPF02684. LpxB. 1 hit.
[Graphical view]
TIGRFAMsiTIGR00215. lpxB. 1 hit.

Sequencei

Sequence statusi: Complete.

A5UD44-1 [UniParc]FASTAAdd to basket

« Hide

        10         20         30         40         50
MNKTNPTIAL VAGEVSGDIL GAGLIRQLKA HYPNARFIGI AGPRMLAEGC
60 70 80 90 100
ETLVDMEELS VMGLAEILKH LPRLLKIRKN IIQTMLQEKP DVYIGIDAPD
110 120 130 140 150
FNLDVELKLK ANGIKTIHYV SPSVWAWRQN RIHKIAKATH QVLAFLPFEK
160 170 180 190 200
AFYDKFNVPC RFIGHTMADA IPLKPNRAEA CQTLQIDPAQ RYLAILVGSR
210 220 230 240 250
GSEVEFLAEP FLKTALLLKE QFPDLQFLVP LVNEKRRIQF EAIKAKITPN
260 270 280 290 300
LDLHLIDGNA RQAMIAADAT LLASGTAALE AMLCKSPMVV GYRMKPLTYF
310 320 330 340 350
LAKRLVKTDY ISLPNLLANE MLVPEMIQEE CTPELLAEKL SVYLSDDESA
360 370 380 390
VKNRHVLIQH FTDLHQKIQC NADKQAAQAV IDLLEGTENV
Length:390
Mass (Da):43,594
Last modified:July 10, 2007 - v1
Checksum:i6BA2C64B3B361B31
GO

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000671 Genomic DNA. Translation: ABQ98695.1.
RefSeqiWP_012054516.1. NC_009566.1.

Genome annotation databases

EnsemblBacteriaiABQ98695; ABQ98695; CGSHiEE_06780.
KEGGihip:CGSHiEE_06780.
PATRICi20278863. VBIHaeInf81350_1366.

Cross-referencesi

Sequence databases

Select the link destinations:
EMBLi
GenBanki
DDBJi
Links Updated
CP000671 Genomic DNA. Translation: ABQ98695.1.
RefSeqiWP_012054516.1. NC_009566.1.

3D structure databases

ProteinModelPortaliA5UD44.
ModBaseiSearch...
MobiDBiSearch...

Protein family/group databases

CAZyiGT19. Glycosyltransferase Family 19.

Protocols and materials databases

Structural Biology KnowledgebaseSearch...

Genome annotation databases

EnsemblBacteriaiABQ98695; ABQ98695; CGSHiEE_06780.
KEGGihip:CGSHiEE_06780.
PATRICi20278863. VBIHaeInf81350_1366.

Phylogenomic databases

eggNOGiCOG0763.
HOGENOMiHOG000018003.
KOiK00748.
OMAiYYIIAGE.
OrthoDBiEOG6FBWZR.

Enzyme and pathway databases

UniPathwayiUPA00359; UER00481.
BioCyciHINF374930:GJDD-1259-MONOMER.

Family and domain databases

HAMAPiMF_00392. LpxB.
InterProiIPR003835. Glyco_trans_19.
[Graphical view]
PfamiPF02684. LpxB. 1 hit.
[Graphical view]
TIGRFAMsiTIGR00215. lpxB. 1 hit.
ProtoNetiSearch...

Publicationsi

  1. "Characterization and modeling of the Haemophilus influenzae core and supragenomes based on the complete genomic sequences of Rd and 12 clinical nontypeable strains."
    Hogg J.S., Hu F.Z., Janto B., Boissy R., Hayes J., Keefe R., Post J.C., Ehrlich G.D.
    Genome Biol. 8:R103.1-R103.18(2007) [PubMed] [Europe PMC] [Abstract]
    Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
    Strain: PittEE.

Entry informationi

Entry nameiLPXB_HAEIE
AccessioniPrimary (citable) accession number: A5UD44
Entry historyi
Integrated into UniProtKB/Swiss-Prot: January 15, 2008
Last sequence update: July 10, 2007
Last modified: July 22, 2015
This is version 52 of the entry and version 1 of the sequence. [Complete history]
Entry statusiReviewed (UniProtKB/Swiss-Prot)
Annotation programProkaryotic Protein Annotation Program

Miscellaneousi

Documents

  1. PATHWAY comments
    Index of metabolic and biosynthesis pathways
  2. SIMILARITY comments
    Index of protein domains and families

External Data

Dasty 3

Similar proteinsi

Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:
100%UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into Uniref entry.
90%UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence).
50%UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster.