Hiroyuki Furuta

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A new strategy termed "Design & Selection" has been developed for construction of artificial ribozymes. In this strategy, two distinct approaches (de novo rational design and in vitro selection) were successfully combined. De novo rational design was employed for construction of a structural scaffold of a new ribozyme whereas in vitro selection was adopted(More)
A novel ribozyme that accelerates the ligation of beta-nicotinamide mononucleotide (beta-NMN)-activated RNA fragments was isolated and characterized. This artificial ligase ribozyme (YFL ribozyme) was isolated by a "design and selection" strategy, in which a modular catalytic unit was generated on a rationally designed modular scaffold RNA. Biochemical(More)
RNA molecules are versatile biomaterials that act not only as DNA-like genetic materials but also have diverse functions in regulation of cellular biosystems. RNA is capable of regulating gene expression by sequence-specific hybridization. This feature allows the design of RNA-based artificial gene regulators (riboregulators). RNA can also build complex(More)
In vitro selection with long random RNA libraries has been used as a powerful method to generate novel functional RNAs, although it often requires laborious structural analysis of isolated RNA molecules. Rational RNA design is an attractive alternative to avoid this laborious step, but rational design of catalytic modules is still a challenging task. A(More)
Interactions between GNRA tetraloops and their receptors are found frequently as modular units in various types of naturally occurring structured RNAs. Due to their functional importance, GNRA/receptor interactions have been studied extensively with regard to their 3D structures and biochemical and biophysical properties. Artificial non-natural(More)
The DSL ribozyme is a class of artificial ligase ribozymes with a highly modular architecture, which catalyzes template-directed RNA ligation on a helical substrate module that can be either covalently connected (cis-DSL) or physically separated (trans-DSL) from the catalytic module. Substrate recognition by the catalytic module is promoted by one or two(More)
As inexpensive and readily available fluorophores for 3' and 5' end labeling of RNA molecules, symmetrical BODIPY (boron dipyrromethene: 4,4-difluoro-4-bora-3a,4a-diaza-s-indacene) derivatives having a primary amino group were designed, and their facile synthetic route was established. Novel BODIPY derivatives exhibited photophysical properties comparable(More)
The YFL ribozyme is an artificial ligase ribozyme isolated by a 'design and selection' strategy, in which a modular catalytic unit was generated on a rationally designed modular scaffold RNA. This ligase ribozyme has a versatile catalytic unit that accepts not only beta-nicotinamide mononucleotide (beta-NMN) but also inorganic pyrophosphate as leaving(More)
As dynamic structural changes are pivotal for the functions of some classes of RNA molecule, it is important to develop methods to monitor structural changes in RNA in a time-dependent manner without chemical modification. Based on previous reports that trans-acting RNAs can be used as probes for analysis and control of 3D structures of target RNAs, we(More)