ArticleActa crystallographica. Section F, Structural biology and crystallization communications2009
Crystallization and preliminary crystallographic studies of putative RNA 3'-terminal phosphate cyclase from the crenarchaeon Sulfolobus tokodaii.
Article in Acta crystallographica. Section F, Structural biology and crystallization communications, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
RNA 3'-terminal phosphate cyclase (Rtc) is an enzyme involved in RNA splicing that converts the 3'-terminal hydroxyl group of truncated RNA to 2',3'-cyclic phosphate, which is required just before its ligation. This reaction may occur in the following two steps: (i) Rtc + ATP --> Rtc-AMP + PP(i) and (ii) RNA-N3'p + Rtc-AMP --> RNA-N>p + Rtc + AMP. In order to reveal the reaction mechanism, Rtc of Sulfolobus tokodaii (St-Rtc) overexpressed in Escherichia coli was purified and crystallized in the following states: St-Rtc, St-Rtc+Mn, St-Rtc+ATP, St-Rtc+AMP and St-Rtc-AMP. The crystals diffracted to 2.25-3.00 A resolution and preliminary solutions of their structures have been obtained by molecular replacement using the structure of a selenomethionine-labelled St-Rtc crystal which was solved in advance using the MAD method as a model. These crystals grew in two different space groups (P3(1) and P4(2)), with the former space group displaying two distinct packing modes.
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