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Literature summary for 2.1.2.13 extracted from

  • Gatzeva-Topalova, P.Z.; May, A.P.; Sousa, M.C.
    Crystal structure and mechanism of the Escherichia coli ArnA (PmrI) transformylase domain. An enzyme for lipid A modification with 4-amino-4-deoxy-L-arabinose and polymyxin resistance (2005), Biochemistry, 44, 5328-5338.
    View publication on PubMed
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Cloned(Commentary)

Cloned (Comment) Organism
ArnA transformylase domain Escherichia coli

Crystallization (Commentary)

Crystallization (Comment) Organism
hanging drop vapor diffusion method, crystal structure of the ArnA transformylase domain is solved to 1.7 A resolution Escherichia coli

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
10-formyltetrahydrofolate + UDP-4-amino-4-deoxy-beta-L-arabinopyranose Escherichia coli ArnA is a key enzyme in the 4-amino-4-deoxy-L-arabinose-lipid A modification pathway. It is a bifunctional enzyme catalyzing the oxidative decarboxylation of UDP-glucuronic acid to the UDP-4''-ketopentose (UDP-beta-L-threo-pentapyranosyl-4''-ulose) and the N-10-formyltetrahydrofolate-dependent formylation of UDP-4-amino-4-deoxy-L-arabinose. The transformylase activity of the Escherichia coli ArnA is contained in its 300 N-terminal residues 5,6,7,8-tetrahydrofolate + UDP-4-deoxy-4-formamido-beta-L-arabinopyranose
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Organism

Organism UniProt Comment Textmining
Escherichia coli P77398
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Purification (Commentary)

Purification (Comment) Organism
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 Escherichia coli

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
10-formyltetrahydrofolate + UDP-4-amino-4-deoxy-beta-L-arabinopyranose ArnA is a key enzyme in the 4-amino-4-deoxy-L-arabinose-lipid A modification pathway. It is a bifunctional enzyme catalyzing the oxidative decarboxylation of UDP-glucuronic acid to the UDP-4''-ketopentose (UDP-beta-L-threo-pentapyranosyl-4''-ulose) and the N-10-formyltetrahydrofolate-dependent formylation of UDP-4-amino-4-deoxy-L-arabinose. The transformylase activity of the Escherichia coli ArnA is contained in its 300 N-terminal residues Escherichia coli 5,6,7,8-tetrahydrofolate + UDP-4-deoxy-4-formamido-beta-L-arabinopyranose
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10-formyltetrahydrofolate + UDP-4-amino-4-deoxy-beta-L-arabinopyranose ArnA is a key enzyme in the 4-amino-4-deoxy-L-arabinose-lipid A modification pathway. It is a bifunctional enzyme catalyzing the oxidative decarboxylation of UDP-glucuronic acid to the UDP-4''-ketopentose (UDP-beta-L-threo-pentapyranosyl-4''-ulose) and the N-10-formyltetrahydrofolate-dependent formylation of UDP-4-amino-4-deoxy-L-arabinose. The transformylase activity of the Escherichia coli ArnA is contained in its 300 N-terminal residues. A mechanism for the transformylation reaction is proposed, catalyzed by ArnA involving residues N102, H104, and D140 Escherichia coli 5,6,7,8-tetrahydrofolate + UDP-4-deoxy-4-formamido-beta-L-arabinopyranose
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