Record Information
Version1.0
StatusDetected and Quantified
Creation Date2021-11-18 02:04:00 UTC
Update Date2022-08-31 18:30:49 UTC
Metabolite IDMMDBc0032140
Metabolite Identification
Common Name(heptosyl)2-Kdo2-lipid A
Description(Heptosyl)2-Kdo2-lipid A is a component of lipopolysaccharide. Bacterial lipopolysaccharides (LPS) typically consist of a hydrophobic domain inserted into the outer membrane known as lipid A (or endotoxin), a phosphorylated "core" oligosaccharide and a distal polysaccharide (or O antigen). The core oligosaccharides are conceptually divided into two regions: inner core and outer core. The inner core is highly conserved, comprises three deoxy-D-manno-octulosonic acid (KDO) and L-glycero-D-manno-heptose (Hep) and is often phosphorylated. The inner core oligosaccharide plays a critical role in essential barrier function of the outer membrane. The outer core comprises a tri-hexose backbone modified with varying side-branch substitutions of hexose and acetamidohexose residues. The outer core provides an attachment site for O-antigen. The completed lipid A-KDO2 serves as the acceptor on which the core oligosaccharide chains are assembled by sequential glycosyl transfer from nucleotide sugar precursors. This process involves a co-ordinated complex of membrane-associated glycosyltransferases acting at the cytoplasmic face of the plasma membrane.
Structure
SynonymsNot Available
Molecular FormulaC126H225N2O49P2
Average Mass2614.101
Monoisotopic Mass2612.467863529
IUPAC Name6-(1,2-dihydroxyethyl)-4-{[6-(1,2-dihydroxyethyl)-4,5-dihydroxy-2-(prop-1-en-2-yl)oxan-2-yl]oxy}-5-{[6-(1,2-dihydroxyethyl)-4-{[6-(1,2-dihydroxyethyl)-3,4,5-trihydroxyoxan-2-yl]oxy}-3,5-dihydroxyoxan-2-yl]oxy}-2-({5-[3-(dodecanoyloxy)tetradecanamido]-6-{[3-hydroxy-5-(3-hydroxytetradecanamido)-4-[(3-hydroxytetradecanoyl)oxy]-6-(phosphonatooxy)oxan-2-yl]methoxy}-3-(phosphonatooxy)-4-{[3-(tetradecanoyloxy)tetradecanoyl]oxy}oxan-2-yl}methoxy)oxane-2-carboxylate
Traditional Name6-(1,2-dihydroxyethyl)-4-{[6-(1,2-dihydroxyethyl)-4,5-dihydroxy-2-(prop-1-en-2-yl)oxan-2-yl]oxy}-5-{[6-(1,2-dihydroxyethyl)-4-{[6-(1,2-dihydroxyethyl)-3,4,5-trihydroxyoxan-2-yl]oxy}-3,5-dihydroxyoxan-2-yl]oxy}-2-({5-[3-(dodecanoyloxy)tetradecanamido]-6-{[3-hydroxy-5-(3-hydroxytetradecanamido)-4-[(3-hydroxytetradecanoyl)oxy]-6-(phosphonatooxy)oxan-2-yl]methoxy}-3-(phosphonatooxy)-4-{[3-(tetradecanoyloxy)tetradecanoyl]oxy}oxan-2-yl}methoxy)oxane-2-carboxylate
CAS Registry NumberNot Available
SMILES
CCCCCCCCCCCCCC(=O)OC(CCCCCCCCCCC)CC(=O)OC1C(NC(=O)CC(CCCCCCCCCCC)OC(=O)CCCCCCCCCCC)C(OCC2OC(OP([O-])([O-])=O)C(NC(=O)CC(O)CCCCCCCCCCC)C(OC(=O)CC(O)CCCCCCCCCCC)C2O)OC(COC2(CC(OC3(CC(O)C(O)C(O3)C(O)CO)C(C)=C)C(OC3OC(C(O)CO)C(O)C(OC4OC(C(O)CO)C(O)C(O)C4O)C3O)C(O2)C(O)CO)C([O-])=O)C1OP([O-])([O-])=O
InChI Identifier
InChI=1S/C126H230N2O49P2/c1-9-15-21-27-33-39-40-46-52-58-64-70-99(143)164-87(68-62-56-50-44-37-31-25-19-13-5)74-101(145)168-118-103(128-97(141)73-86(67-61-55-49-43-36-30-24-18-12-4)163-98(142)69-63-57-51-45-38-32-26-20-14-6)120(161-81-94-105(147)117(167-100(144)72-85(134)66-60-54-48-42-35-29-23-17-11-3)102(121(165-94)177-179(158,159)160)127-96(140)71-84(133)65-59-53-47-41-34-28-22-16-10-2)166-95(116(118)176-178(155,156)157)82-162-126(124(153)154)76-93(173-125(83(7)8)75-88(135)104(146)113(174-125)91(138)79-131)115(114(175-126)92(139)80-132)171-123-110(152)119(109(151)112(170-123)90(137)78-130)172-122-108(150)106(148)107(149)111(169-122)89(136)77-129/h84-95,102-123,129-139,146-152H,7,9-82H2,1-6,8H3,(H,127,140)(H,128,141)(H,153,154)(H2,155,156,157)(H2,158,159,160)/p-5
InChI KeyDBFYJNVGWVVVGJ-UHFFFAOYSA-I