3I4X

Crystal structure of the dimethylallyl tryptophan synthase FgaPT2 from Aspergillus fumigatus in complex with Trp and DMSPP

3I4X の概要

• エントリーDOI: 10.2210/pdb3i4x/pdb
• 関連するPDBエントリー: 3I4Z
• 分子名称: Tryptophan dimethylallyltransferase, DIMETHYLALLYL S-THIOLODIPHOSPHATE, TRYPTOPHAN, ... (5 entities in total)
• 機能のキーワード: prenyl transferase, dimethylallyl tryptophan synthase, pt barrel, tryptophan complex, dimethylallyl s-thiolodiphosphate complex, alkaloid metabolism, transferase
• 由来する生物種: Aspergillus fumigatus (Sartorya fumigata)
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 107101.13

構造登録者

Schall, C.,Zocher, G.,Stehle, T. (登録日: 2009-07-03, 公開日: 2009-09-01, 最終更新日: 2023-11-01)

主引用文献

Metzger, U.,Schall, C.,Zocher, G.,Unsoeld, I.,Stec, E.,Li, S.-M.,Heide, L.,Stehle, T.
The structure of dimethylallyl tryptophan synthase reveals a common architecture of aromatic prenyltransferases in fungi and bacteria
Proc.Natl.Acad.Sci.USA, 106:14309-14314, 2009

PubMed Abstract: Ergot alkaloids are toxins and important pharmaceuticals that are produced biotechnologically on an industrial scale. The first committed step of ergot alkaloid biosynthesis is catalyzed by dimethylallyl tryptophan synthase (DMATS; EC 2.5.1.34). Orthologs of DMATS are found in many fungal genomes. We report here the x-ray structure of DMATS, determined at a resolution of 1.76 A. A complex of DMATS from Aspergillus fumigatus with its aromatic substrate L-tryptophan and with an analogue of its isoprenoid substrate dimethylallyl diphosphate reveals the structural basis of this enzyme-catalyzed Friedel-Crafts reaction, which shows strict regiospecificity for position 4 of the indole nucleus of tryptophan as well as unusual independence of the presence of Mg(2+) ions. The 3D structure of DMATS belongs to a rare beta/alpha barrel fold, called prenyltransferase barrel, that was recently discovered in a small group of bacterial enzymes with no sequence similarity to DMATS. These bacterial enzymes catalyze the prenylation of aromatic substrates in the biosynthesis of secondary metabolites (i.e., a reaction similar to that of DMATS).

PubMed: 19706516
DOI: 10.1073/pnas.0904897106

実験手法

X-RAY DIFFRACTION (2.1 Å)