Biology:Lipid IVA 4-amino-4-deoxy-L-arabinosyltransferase
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Short description: Class of enzymes
| Lipid IVA 4-amino-4-deoxy-L-arabinosyltransferase | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 2.4.2.43 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
| |||||||||
Lipid IVA 4-amino-4-deoxy-L-arabinosyltransferase (EC 2.4.2.43, undecaprenyl phosphate-alpha-L-Ara4N transferase, 4-amino-4-deoxy-L-arabinose lipid A transferase, polymyxin resistance protein PmrK, arnT (gene)) is an enzyme with systematic name 4-amino-4-deoxy-alpha-L-arabinopyranosyl ditrans, octacis-undecaprenyl phosphate:lipid IVA 4-amino-4-deoxy-L-arabinopyranosyltransferase.[1][2][3][4][5] This enzyme catalyses the following chemical reaction
- (1) 4-amino-4-deoxy-alpha-L-arabinopyranosyl ditrans, octacis-undecaprenyl phosphate + alpha-Kdo-(2->4)-alpha-Kdo-(2->6)-lipid A [math]\displaystyle{ \rightleftharpoons }[/math] alpha-Kdo-(2->4)-alpha-Kdo-(2->6)-[4-P-L-Ara4N]-lipid A + ditrans, octacis-undecaprenyl phosphate
- (2) 4-amino-4-deoxy-alpha-L-arabinopyranosyl ditrans, octacis-undecaprenyl phosphate + lipid IVA [math]\displaystyle{ \rightleftharpoons }[/math] lipid IIA + ditrans, octacis-undecaprenyl phosphate
- (3) 4-amino-4-deoxy-alpha-L-arabinopyranosyl ditrans, octacis-undecaprenyl phosphate + alpha-Kdo-(2->4)-alpha-Kdo-(2->6)-lipid IVA [math]\displaystyle{ \rightleftharpoons }[/math] 4'-alpha-L-Ara4N-alpha-Kdo-(2->4)-alpha-Kdo-(2->6)-lipid IVA + ditrans, octacis-undecaprenyl phosphate
This integral membrane protein is present in the inner membrane of certain Gram negative endobacteria.
References
- ↑ "An inner membrane enzyme in Salmonella and Escherichia coli that transfers 4-amino-4-deoxy-L-arabinose to lipid A: induction on polymyxin-resistant mutants and role of a novel lipid-linked donor". The Journal of Biological Chemistry 276 (46): 43122–31. November 2001. doi:10.1074/jbc.m106961200. PMID 11535604.
- ↑ "Accumulation of a polyisoprene-linked amino sugar in polymyxin-resistant Salmonella typhimurium and Escherichia coli: structural characterization and transfer to lipid A in the periplasm". The Journal of Biological Chemistry 276 (46): 43132–44. November 2001. doi:10.1074/jbc.m106962200. PMID 11535605.
- ↑ "Lipid A modifications in polymyxin-resistant Salmonella typhimurium: PMRA-dependent 4-amino-4-deoxy-L-arabinose, and phosphoethanolamine incorporation". The Journal of Biological Chemistry 276 (46): 43111–21. November 2001. doi:10.1074/jbc.m106960200. PMID 11535603.
- ↑ "Purification and characterization of the L-Ara4N transferase protein ArnT from Salmonella typhimurium". Protein Expression and Purification 46 (1): 33–9. March 2006. doi:10.1016/j.pep.2005.08.028. PMID 16226890.
- ↑ "Identification of a functionally important loop in Salmonella typhimurium ArnT". Biochemistry 49 (1): 29–35. January 2010. doi:10.1021/bi901572f. PMID 19947657.
External links
- Lipid+IVA+4-amino-4-deoxy-L-arabinosyltransferase at the US National Library of Medicine Medical Subject Headings (MeSH)
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