3n0g
From Proteopedia
Crystal Structure of Isoprene Synthase from Grey Poplar Leaves (Populus x canescens) in complex with three Mg2+ ions and dimethylallyl-S-thiolodiphosphate
Structural highlights
FunctionISPS_POPCN Lyase that catalyzes the formation of isoprene from dimethylallyl diphosphate via a syn-periplanar elimination mechanism in which the diphosphate-leaving group serves as a general base.[1] [2] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe X-ray crystal structure of recombinant PcISPS (isoprene synthase from gray poplar hybrid Populusxcanescens) has been determined at 2.7 A resolution, and the structure of its complex with three Mg(2+) and the unreactive substrate analogue dimethylallyl-S-thiolodiphosphate has been determined at 2.8 A resolution. Analysis of these structures suggests that the generation of isoprene from substrate dimethylallyl diphosphate occurs via a syn-periplanar elimination mechanism in which the diphosphate-leaving group serves as a general base. This chemical mechanism is responsible for the annual atmospheric emission of 100 Tg of isoprene by terrestrial plant life. Importantly, the PcISPS structure promises to guide future protein engineering studies, potentially leading to hydrocarbon fuels and products that do not rely on traditional petrochemical sources. Structure of Isoprene Synthase Illuminates the Chemical Mechanism of Teragram Atmospheric Carbon Emission.,Koksal M, Zimmer I, Schnitzler JP, Christianson DW J Mol Biol. 2010 Jul 17. PMID:20624401[3] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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