{"title":"9-(2-C-Cyano-2-deoxy-beta-D-arabino-pentofuranosyl)guanine, a potential antitumor agent against B-lymphoma infected with Kaposi's sarcoma-associated herpesvirus.","authors":"Satoshi Ichikawa, Masaki Otawa, Yasuhiro Teishikata, Koji Yamada, Masahiro Fujimuro, Hideyoshi Yokosawa, Akira Matsuda","doi":"10.1093/nass/nrp048","DOIUrl":"https://doi.org/10.1093/nass/nrp048","url":null,"abstract":"<p><p>Several 9-(2-C-cyano-2-deoxy-l-beta-D-arabino-pentofuranosyl)purine derivatives were tested against Kaposi's sarcoma-associated herpesvirus (KSHV)-infected primary effusion lymphoma (PEL) cells. The guanine derivative (2, CNDAG) as well as the 2-amino-6-substituted-purine derivatives 3, 4 and 5 inhibited KSHV-positive cell growth but showed no cytotoxicity against KSHV-negative cells at >15 muM concentrations. Therefore, it was found that compounds 2, 3, 4 and 5 showed selective cytotoxicity against PEL cells infected with KSHV.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"95-6"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp048","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28397565","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis of 5'-fluoro-2'-beta-methylneplanocin analogues.","authors":"Hiroki Kumamoto, Marina Kobayashi, Hiromichi Tanaka","doi":"10.1093/nass/nrp051","DOIUrl":"https://doi.org/10.1093/nass/nrp051","url":null,"abstract":"<p><p>Synthesis of 5'-fluoro-2'-beta-methylneplanocin analogues (5) was carried out. The cyclopentenone 16 was prepared from methyl mannopyranoside by using ring closing metathesis, stereoselective introduction of methyl group, and seleno cyclization as representative steps. Introduction of a fluorine atom was conducted by electrophilic fluorination. Antiviral activity of 5 will also be presented.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"101-2"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp051","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28397568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Acridone-labeled DNA aptamer for the detection of biomolecules.","authors":"Hiroaki Ozaki, Yasuhisa Hagiwara, Hiromi Asakura, Masayasu Kuwahara","doi":"10.1093/nass/nrp128","DOIUrl":"https://doi.org/10.1093/nass/nrp128","url":null,"abstract":"<p><p>An acridone-labeled DNA aptamer was synthesized to produce an aptamer probe. This aptamer probe could detect a specific molecule based on conformational changes upon binding of the specific molecules and the quenching of acridone emission.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"255-6"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp128","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28397574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Aptazyme-based biosensors using a eukaryotic cell-free translation system.","authors":"Atsushi Ogawa","doi":"10.1093/nass/nrp131","DOIUrl":"https://doi.org/10.1093/nass/nrp131","url":null,"abstract":"<p><p>I have constructed a novel aptazyme-based biosensor system for detecting cofactors of the aptazymes using a cell-free luciferase synthesis in wheat germ extract. In this system, the activity of the aptazyme that is fused to a 5'-untranslated region of a luciferase gene can be detected as luciferase expression. In translating the aptazyme-fused mRNA as-is using a wheat germ cell-free translation system, the luciferase is almost not expressed because of the following triple suppression effects: (1) 5'-terminal three bases and (2) 5'-terminal duplex prevent the ribosome from binding to own mRNA; (3) if the ribosome binds, translation of a mimic gene in the aptazyme inhibits that of the downstream luciferase gene (OFF state). In contrast, in the presence of the aptazyme cofactor, the aptazyme in mRNA is self-cleaved to produce an aptazyme-free luciferase gene, which is translated efficiently (ON state). The ON/OFF efficiency and the detection limit of the aptazyme-based biosensor for theophylline are much higher and lower, respectively, compared to those of previously-reported one that utilizes a prokaryotic translation system.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"261-2"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp131","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28397577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Three-dimensional DNA nanostructures constructed by folding of multiple rectangles.","authors":"Masayuki Endo, Hiroshi Sugiyama","doi":"10.1093/nass/nrp041","DOIUrl":"https://doi.org/10.1093/nass/nrp041","url":null,"abstract":"<p><p>The novel multi-arm DNA structures were designed using 2D-DNA Origami method, and these structures were folded into 3D hollow prism structures by introduction of connection strands into the arms. The opening of the prism structures were examined by a high-speed AFM, which showed the dissociation events of the connecting arms in the 3D-structures.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"81-2"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28398383","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Photo-controllable aptamer.","authors":"Shinzi Ogasawara, Mizuo Maeda","doi":"10.1093/nass/nrp098","DOIUrl":"https://doi.org/10.1093/nass/nrp098","url":null,"abstract":"<p><p>We have successfully developed a new method for photoregulation of G-quadruplex formation using cis-trans photoisomerization of the photochromic nucleobase (8FV)G. Our photo-controllable quadruplexes can be switched between a very stable quadruplex state and a non-structured state in a straightforward and reversible fashion. We also demonstrated reversibly control binding of a G-quadruplex aptamer to thrombin.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"195-6"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp098","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28398391","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Synthesis and properties of new fluorescent nucleosides and oligodeoxynucleotides derived from 5-formyl-2'-deoxyuridine.","authors":"Wataru Hirose, Kousuke Sato, Akira Matsuda","doi":"10.1093/nass/nrp068","DOIUrl":"https://doi.org/10.1093/nass/nrp068","url":null,"abstract":"<p><p>5-Formyl-2'-deoxyuridine (fdUrd) is a product of the oxidation of thymidine and is known to induce mutation (A:T to G:C) in DNA. Therefore, a selective detection method for fdUrd is needed, but convenient methods have not been developed. We planned to develop a novel selective method to detect fdUrd in damaged DNA based on a specific fluorogenic derivatization of fdUrd using 2-aminothiophenol derivatives (ATs) as fluorogenic reagents. To achieve this goal, we first investigated the synthesis and fluorescence properties of some 5-(benzothiazol-2-yl)-2'-deoxyuridine derivatives (btdUrds). We also report the reaction between oligodeoxynucleotides (ODNs) containing fdUrd and ATs.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"135-6"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp068","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28470956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Precise analysis of modification status at various stage of tRNA maturation in Saccharomyces cerevisiae.","authors":"Takayuki Ohira, Kenjyo Miyauchi, Yuriko Sakaguchi, Takeo Suzuki, Tsutomu Suzuki","doi":"10.1093/nass/nrp151","DOIUrl":"https://doi.org/10.1093/nass/nrp151","url":null,"abstract":"<p><p>Transfer RNAs (tRNAs) are decorated with various post-transcriptional modifications which are enzymatically introduced at various stages of maturation. It is known that eukaryotic tRNAs are modified both in nucleus and cytoplasm. However, the order of tRNA modifications remains to be investigated. To unveil the precise timing of each modification associated with tRNA processing, we isolated precursor forms of Saccharomyces cerevisiae tRNAs at different stages of maturation, and analyzed their primary structures including modifications by mass spectrometry. The primary transcript of tRNA(Ile) was isolated from the tRNA fraction co-precipitated with Lhp1p, a yeast homolog of La protein. The precursor tRNA(Ile) without 3'-trailer sequence was isolated from the expression controllable strain when RNase P was transiently inactivated. Mass spectrometric analyses of these tRNAs revealed that many modifications were fully introduced at the stage of primary transcript, however, some modifications were partially introduced.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"301-2"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp151","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28475071","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Investigation of the mechanism of the fluorescent emission of the silylated pyrene modified DNA.","authors":"Tomohisa Moriguchi, Masayoshi Hattori, Tohru Sekiguchi, Kazuo Shinozuka","doi":"10.1093/nass/nrp016","DOIUrl":"https://doi.org/10.1093/nass/nrp016","url":null,"abstract":"<p><p>Modified DNA containing silylated pyrene derivative at the 5'-terminus showed the obvious discrimination ability of the duplex formation, that the modified DNA showed the strong fluorescence emission in the presence of the complementary DNA, in spite of the very weak emission in the absence of the complementary DNA. The intensity of the fluorescence emission of the double strand found to increase about 10 times compared with that of the single strand. In this paper, we tried to disclose the detailed mechanism of such a discrimination ability of the silylated pyrene-modified DNA.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"31-2"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp016","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28475050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Physiological role of RsgA in ribosome biosynthesis.","authors":"Yoichi Hase, Shinichiro Yokoyama, Takatugu Kimura, Shimon Goto, Akira Muto, Hyouta Himeno","doi":"10.1093/nass/nrp154","DOIUrl":"https://doi.org/10.1093/nass/nrp154","url":null,"abstract":"<p><p>RsgA is a unique GTP hydrolytic protein, in which the GTPase activity is significantly enhanced by the small ribosomal subunit. Depletion of RsgA causes slow cell growth as well as defects in the subunit assembly of the ribosome and the 16S rRNA processing, suggesting its involvement in the maturation of the small subunit. Several antibiotics bound to the decoding center of the small subunit inhibited the ribosome-dependent GTPase activity of RsgA. Our recent study using chemical modification indicates that the binding of RsgA induces conformational changes around the A site, P site, and helix 44. These results suggest that RsgA is involved in the maturation step of the decoding center of the small subunit of ribosome. Here, we also show a physiological role of RsgA under stress condition.</p>","PeriodicalId":87448,"journal":{"name":"Nucleic acids symposium series (2004)","volume":" 53","pages":"307-8"},"PeriodicalIF":0.0,"publicationDate":"2009-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1093/nass/nrp154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28475074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}