Record Information
Version 1.0
Update Date 1/22/2018 12:54:54 PM
Metabolite IDPAMDB001507
Identification
Name: Lipid A
Description:Lipid A is a lipid that comprises the innermost of the three regions of the lipopolysaccharide (LPS) molecule found in the outer membrane of Gram-negative bacteria such as Pseudomonas aeruginosa. Its hydrophobic nature allows it to anchor the LPS to the outer membrane. Lipid A consists of two glucosamine (carbohydrate/sugar) units with attached acyl chains ("fatty acids"), and normally containing one phosphate group on each carbohydrate. The Pseudomonas aeruginosa lipid A typically has four C14 hydroxy acyl chains attached to the sugars and one C14 and one C12 attached to the beta hydroxy groups. (Wikipedia)
Structure
Thumb
Synonyms:
  • Diphosphoryl hexaacyl lipid A
  • NULL
  • Synthetic E. coli lipid A
Chemical Formula: C94H178N2O25P2
Average Molecular Weight: 1798.365
Monoisotopic Molecular Weight: 1797.21939228
InChI Key: GZQKNULLWNGMCW-PWQABINMSA-N
InChI:InChI=1S/C94H178N2O25P2/c1-7-13-19-25-31-37-38-44-50-56-62-68-84(103)115-78(66-60-54-48-42-35-29-23-17-11-5)72-86(105)119-92-88(96-82(101)71-77(65-59-53-47-41-34-28-22-16-10-4)114-83(102)67-61-55-49-43-36-30-24-18-12-6)93(116-79(73-97)90(92)120-122(107,108)109)113-74-80-89(106)91(118-85(104)70-76(99)64-58-52-46-40-33-27-21-15-9-3)87(94(117-80)121-123(110,111)112)95-81(100)69-75(98)63-57-51-45-39-32-26-20-14-8-2/h75-80,87-94,97-99,106H,7-74H2,1-6H3,(H,95,100)(H,96,101)(H2,107,108,109)(H2,110,111,112)/t75-,76-,77-,78-,79-,80-,87-,88-,89-,90-,91-,92-,93-,94-/m1/s1
CAS number: Not Available
IUPAC Name:{[(2R,3S,4R,5R,6R)-5-[(3R)-3-(dodecanoyloxy)tetradecanamido]-6-{[(2R,3S,4R,5R,6R)-3-hydroxy-5-[(3R)-3-hydroxytetradecanamido]-4-{[(3R)-3-hydroxytetradecanoyl]oxy}-6-(phosphonooxy)oxan-2-yl]methoxy}-2-(hydroxymethyl)-4-{[(3R)-3-(tetradecanoyloxy)tetradecanoyl]oxy}oxan-3-yl]oxy}phosphonic acid
Traditional IUPAC Name: lipid A
SMILES:CCCCCCCCCCCCCC(=O)O[C@H](CCCCCCCCCCC)CC(=O)O[C@@H]1[C@@H](NC(=O)C[C@@H](CCCCCCCCCCC)OC(=O)CCCCCCCCCCC)[C@H](OC[C@H]2O[C@H](OP(O)(O)=O)[C@H](NC(=O)C[C@H](O)CCCCCCCCCCC)[C@@H](OC(=O)C[C@H](O)CCCCCCCCCCC)[C@@H]2O)O[C@H](CO)[C@H]1OP(O)(O)=O
Chemical Taxonomy
Taxonomy DescriptionThis compound belongs to the class of organic compounds known as saccharolipids. These are compounds in which fatty acids are linked directly to a sugar backbone, forming structures that are compatible with membrane bilayers. In the saccharolipids, a sugar substitutes for the glycerol backbone that is present in glycerolipids and glycerophospholipids. The most familiar saccharolipids contain an acylated glucosamine. In contrast to others glycolipids, the fatty acid is not glycosidically linked to the sugar moiety.
Kingdom Organic compounds
Super ClassLipids and lipid-like molecules
Class Saccharolipids
Sub ClassNot Available
Direct Parent Saccharolipids
Alternative Parents
Substituents
  • Saccharolipid
  • N-acyl-alpha-hexosamine
  • Disaccharide phosphate
  • Tetracarboxylic acid or derivatives
  • Glucosamine
  • Amino sugar
  • O-glycosyl compound
  • Glycosyl compound
  • Disaccharide
  • Monoalkyl phosphate
  • Amino saccharide
  • Fatty acid ester
  • Beta-hydroxy acid
  • Fatty acyl
  • Alkyl phosphate
  • Phosphoric acid ester
  • Oxane
  • Organic phosphoric acid derivative
  • Organic phosphate
  • Hydroxy acid
  • Saccharide
  • Secondary alcohol
  • Carboxylic acid ester
  • Oxacycle
  • Organoheterocyclic compound
  • Organic 1,3-dipolar compound
  • Propargyl-type 1,3-dipolar organic compound
  • Carboxylic acid derivative
  • Carboximidic acid derivative
  • Carboximidic acid
  • Acetal
  • Hydrocarbon derivative
  • Primary alcohol
  • Organooxygen compound
  • Organonitrogen compound
  • Carbonyl group
  • Alcohol
  • Aliphatic heteromonocyclic compound
Molecular Framework Aliphatic heteromonocyclic compounds
External Descriptors
Physical Properties
State: Solid
Charge:-4
Melting point: Not Available
Experimental Properties:
PropertyValueSource
Predicted Properties
PropertyValueSource
Water Solubility0.00121 mg/mLALOGPS
logP6.8ALOGPS
logP23.97ChemAxon
logS-6.2ALOGPS
pKa (Strongest Acidic)0.61ChemAxon
pKa (Strongest Basic)-3ChemAxon
Physiological Charge-4ChemAxon
Hydrogen Acceptor Count19ChemAxon
Hydrogen Donor Count10ChemAxon
Polar Surface Area405.53 Å2ChemAxon
Rotatable Bond Count88ChemAxon
Refractivity477.18 m3·mol-1ChemAxon
Polarizability213.02 Å3ChemAxon
Number of Rings2ChemAxon
Bioavailability0ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleYesChemAxon
Biological Properties
Cellular Locations: Membrane
Reactions:
Pathways:
Spectra
Spectra:
References
References:
  • Kanehisa, M., Goto, S., Sato, Y., Furumichi, M., Tanabe, M. (2012). "KEGG for integration and interpretation of large-scale molecular data sets." Nucleic Acids Res 40:D109-D114. Pubmed: 22080510
  • Keseler, I. M., Collado-Vides, J., Santos-Zavaleta, A., Peralta-Gil, M., Gama-Castro, S., Muniz-Rascado, L., Bonavides-Martinez, C., Paley, S., Krummenacker, M., Altman, T., Kaipa, P., Spaulding, A., Pacheco, J., Latendresse, M., Fulcher, C., Sarker, M., Shearer, A. G., Mackie, A., Paulsen, I., Gunsalus, R. P., Karp, P. D. (2011). "EcoCyc: a comprehensive database of Escherichia coli biology." Nucleic Acids Res 39:D583-D590. Pubmed: 21097882
  • Uniprot Consortium (2012). "Reorganizing the protein space at the Universal Protein Resource (UniProt)." Nucleic Acids Res 40:D71-D75. Pubmed: 22102590
Synthesis Reference: Not Available
Material Safety Data Sheet (MSDS) Not Available
External Links:
ResourceLink
CHEBI ID47040
HMDB IDHMDB13244
Pubchem Compound ID9877306
Kegg IDC13908
ChemSpider ID8052983
WikipediaLipid A
BioCyc IDLipid-A
EcoCyc IDLipid-A

Enzymes

General function:
Involved in nucleotide binding
Specific function:
Involved in lipid A export and possibly also in glycerophospholipid export and for biogenesis of the outer membrane. Transmembrane domains (TMD) form a pore in the inner membrane and the ATP-binding domain (NBD) is responsible for energy generation
Gene Name:
msbA
Locus Tag:
PA4997
Molecular weight:
66.4 kDa

Transporters

General function:
Involved in nucleotide binding
Specific function:
Involved in lipid A export and possibly also in glycerophospholipid export and for biogenesis of the outer membrane. Transmembrane domains (TMD) form a pore in the inner membrane and the ATP-binding domain (NBD) is responsible for energy generation
Gene Name:
msbA
Locus Tag:
PA4997
Molecular weight:
66.4 kDa