Enzymes
| UniProtKB help_outline | 1 proteins |
Reaction participants Show >> << Hide
- Name help_outline (9Z)-hexadecenoyl-(Kdo)2-lipid IVA (E. coli) Identifier CHEBI:61520 Charge -6 Formula C100H176N2O38P2 InChIKeyhelp_outline GUGOELZTMNFFOJ-MHGVWHNGSA-H SMILEShelp_outline [H][C@@]1(O[C@@](C[C@@H](O)[C@H]1O)(O[C@@H]1C[C@@](OC[C@H]2O[C@@H](OC[C@H]3O[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]3O)[C@H](NC(=O)C[C@@H](CCCCCCCCCCC)OC(=O)CCCCCCC\C=C/CCCCCC)[C@@H](OC(=O)C[C@H](O)CCCCCCCCCCC)[C@@H]2OP([O-])([O-])=O)(O[C@]([H])([C@H](O)CO)[C@@H]1O)C([O-])=O)C([O-])=O)[C@H](O)CO 2D coordinates Mol file for the small molecule Search links Involved in 2 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
tetradecanoyl-[ACP]
Identifier
RHEA-COMP:9648
Reactive part
help_outline
- Name help_outline O-(S-tetradecanoylpantetheine-4ʼ-phosphoryl)-L-serine residue Identifier CHEBI:78477 Charge -1 Formula C28H51N3O9PS SMILEShelp_outline CCCCCCCCCCCCCC(=O)SCCNC(=O)CCNC(=O)[C@H](O)C(C)(C)COP([O-])(=O)OC[C@H](N-*)C(-*)=O 2D coordinates Mol file for the small molecule Search links Involved in 8 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
- Name help_outline ((9Z)-hexadecenoyl-tetradecanoyl)-(Kdo)2-lipid A Identifier CHEBI:61522 Charge -6 Formula C114H202N2O39P2 InChIKeyhelp_outline YMYMIWUIGJUAIZ-LSPGFKFTSA-H SMILEShelp_outline [H][C@@]1(O[C@@](C[C@@H](O)[C@H]1O)(O[C@@H]1C[C@@](OC[C@H]2O[C@@H](OC[C@H]3O[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]3O)[C@H](NC(=O)C[C@@H](CCCCCCCCCCC)OC(=O)CCCCCCC\C=C/CCCCCC)[C@@H](OC(=O)C[C@@H](CCCCCCCCCCC)OC(=O)CCCCCCCCCCCCC)[C@@H]2OP([O-])([O-])=O)(O[C@]([H])([C@H](O)CO)[C@@H]1O)C([O-])=O)C([O-])=O)[C@H](O)CO 2D coordinates Mol file for the small molecule Search links Involved in 1 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
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Namehelp_outline
holo-[ACP]
Identifier
RHEA-COMP:9685
Reactive part
help_outline
- Name help_outline O-(pantetheine-4ʼ-phosphoryl)-L-serine residue Identifier CHEBI:64479 Charge -1 Formula C14H25N3O8PS SMILEShelp_outline C(NC(CCNC(=O)[C@@H](C(COP(OC[C@@H](C(*)=O)N*)(=O)[O-])(C)C)O)=O)CS 2D coordinates Mol file for the small molecule Search links Involved in 190 reaction(s) Find molecules that contain or resemble this structure Find proteins in UniProtKB for this molecule
Cross-references
| RHEA:28434 | RHEA:28435 | RHEA:28436 | RHEA:28437 | |
|---|---|---|---|---|
| Reaction direction help_outline | undefined | left-to-right | right-to-left | bidirectional |
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| EcoCyc help_outline |
Publications
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Effect of cold shock on lipid A biosynthesis in Escherichia coli. Induction at 12 degrees C of an acyltransferase specific for palmitoleoyl-acyl carrier protein.
Carty S.M., Sreekumar K.R., Raetz C.R.
Palmitoleate is not present in lipid A isolated from Escherichia coli grown at 30 degrees C or higher, but it comprises approximately 11% of the fatty acyl chains of lipid A in cells grown at 12 degrees C. The appearance of palmitoleate at 12 degrees C is accompanied by a decline in laurate from a ... >> More
Palmitoleate is not present in lipid A isolated from Escherichia coli grown at 30 degrees C or higher, but it comprises approximately 11% of the fatty acyl chains of lipid A in cells grown at 12 degrees C. The appearance of palmitoleate at 12 degrees C is accompanied by a decline in laurate from approximately 18% to approximately 5.5%. We now report that wild-type E. coli shifted from 30 degrees C to 12 degrees C acquire a novel palmitoleoyl-acyl carrier protein (ACP)-dependent acyltransferase that acts on the key lipid A precursor Kdo2-lipid IVA. The palmitoleoyl transferase is induced more than 30-fold upon cold shock, as judged by assaying extracts of cells shifted to 12 degrees C. The induced activity is maximal after 2 h of cold shock, and then gradually declines but does not disappear. Strains harboring an insertion mutation in the lpxL(htrB) gene, which encodes the enzyme that normally transfers laurate from lauroyl-ACP to Kdo2-lipid IVA (Clementz, T., Bednarski, J. J., and Raetz, C. R. H. (1996) J. Biol. Chem. 271, 12095-12102) are not defective in the cold-induced palmitoleoyl transferase. Recently, a gene displaying 54% identity and 73% similarity at the protein level to lpxL was found in the genome of E. coli. This lpxL homologue, designated lpxP, encodes the cold shock-induced palmitoleoyl transferase. Extracts of cells containing lpxP on the multicopy plasmid pSK57 exhibit a 10-fold increase in the specific activity of the cold-induced palmitoleoyl transferase compared with cells lacking the plasmid. The elevated specific activity of the palmitoleoyl transferase under conditions of cold shock is attributed to greatly increased levels of lpxP mRNA. The replacement of laurate with palmitoleate in lipid A may reflect the desirability of maintaining the optimal outer membrane fluidity at 12 degrees C. << Less
J. Biol. Chem. 274:9677-9685(1999) [PubMed] [EuropePMC]
This publication is cited by 2 other entries.