Nucleosides & nucleotides最新文献

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A single carbocyclic nucleotide substitution in a 12mer DNA gives a Hoogsteen basepaired duplex (till 38 degrees C) and a hairpin (till 65 degrees C). A 600 MHz NMR spectroscopic study. 在一个12聚体DNA中,一个单碳环核苷酸取代得到一个胡格斯汀碱基双链(直到38摄氏度)和一个发夹(直到65摄氏度)。600 MHz核磁共振光谱研究。
Nucleosides & nucleotides Pub Date : 1999-06-01 DOI: 10.1080/07328319908044793
J Isaksson, T Maltseva, P Agback, X Luo, A Kumar, E Zamaratski, J Chattopadhyaya
{"title":"A single carbocyclic nucleotide substitution in a 12mer DNA gives a Hoogsteen basepaired duplex (till 38 degrees C) and a hairpin (till 65 degrees C). A 600 MHz NMR spectroscopic study.","authors":"J Isaksson,&nbsp;T Maltseva,&nbsp;P Agback,&nbsp;X Luo,&nbsp;A Kumar,&nbsp;E Zamaratski,&nbsp;J Chattopadhyaya","doi":"10.1080/07328319908044793","DOIUrl":"https://doi.org/10.1080/07328319908044793","url":null,"abstract":"<p><p>The impact of intramolecular stereoelectronic effects has been examined by comparison of the solution structures of natural oligo-DNA duplex, 5'(1C2G3C4G5A6A7T8T9C10G11C12G)2(3'), and its carbocyclic-nucleotide analogues in which the pentose sugar in 2'-dA residue is replaced with its carbocyclic counterpart (i.e. 2'-deoxyaristeromycin). Based on the NMR evidences, it has been shown, that 2'-deoxyaristeromycin analog exists in a dynamic equilibrium between the two forms of duplexes, one with W-C bp and the second with Hoogsteen bp in ca 1:1 ratio at lower temperature (below 35 degrees C) and as hairpin at higher temperature (from approximately 40 degrees-60 degrees C).</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 6-7","pages":"1593-6"},"PeriodicalIF":0.0,"publicationDate":"1999-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/07328319908044793","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21338145","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}
引用次数: 2
Effect of oligomer length and base substitutions on the cytotoxic activity and specific nuclear protein recognition of GTn oligonucleotides in the human leukemic CCRF-CEM cell line. 低聚物长度和碱基取代对人白血病CCRF-CEM细胞系GTn寡核苷酸细胞毒活性和特异性核蛋白识别的影响
Nucleosides & nucleotides Pub Date : 1999-06-01 DOI: 10.1080/07328319908044830
C Morassutti, B Dapas, B Scaggiante, G Paroni, L Xodo, F Quadrifoglio
{"title":"Effect of oligomer length and base substitutions on the cytotoxic activity and specific nuclear protein recognition of GTn oligonucleotides in the human leukemic CCRF-CEM cell line.","authors":"C Morassutti,&nbsp;B Dapas,&nbsp;B Scaggiante,&nbsp;G Paroni,&nbsp;L Xodo,&nbsp;F Quadrifoglio","doi":"10.1080/07328319908044830","DOIUrl":"https://doi.org/10.1080/07328319908044830","url":null,"abstract":"<p><p>We have identified phosphodiester oligonucleotides composed of G and T bases, named GTn, which are able to inhibit the cellular growth of human cancer cell lines by recognising specific nuclear proteins. We demonstrated that GTn oligonucleotides require a length of at least 20 nucleotides in order to exert a significant cytotoxic effect and to retain the specific protein binding ability. In addition, we found that GTn cytotoxicity was lost when A or C bases were introduced at either 3' and 5' end or within the GTn sequences.</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 6-7","pages":"1711-6"},"PeriodicalIF":0.0,"publicationDate":"1999-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/07328319908044830","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21337932","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}
引用次数: 11
Modified nucleoside 5'-triphosphonates as a new type of antiviral agents. 修饰核苷5′-三膦酸盐作为一种新型抗病毒药物。
Nucleosides & nucleotides Pub Date : 1999-04-01 DOI: 10.1080/15257779908041639
E A Shirokova, A V Shipitsin, L S Victorova, N B Dyatkina, L E Goryunova, R S Beabealashvilli, C J Hamilton, S M Roberts, A A Krayevsky
{"title":"Modified nucleoside 5'-triphosphonates as a new type of antiviral agents.","authors":"E A Shirokova,&nbsp;A V Shipitsin,&nbsp;L S Victorova,&nbsp;N B Dyatkina,&nbsp;L E Goryunova,&nbsp;R S Beabealashvilli,&nbsp;C J Hamilton,&nbsp;S M Roberts,&nbsp;A A Krayevsky","doi":"10.1080/15257779908041639","DOIUrl":"https://doi.org/10.1080/15257779908041639","url":null,"abstract":"Abstract The design of dNTP analogs with increased stability in vivo could produce a new group of highly effective inhibitors of HIV reproduction. The advantages of such compounds would be as follows: (i) Independence on the phosphorylation process catalyzed by intracellular enzymes, and direct inhibition of proviral DNA synthesis. (ii) The lack of the cell cycle effect on their activity. (iii) The ability to inhibit reverse transcription of the virus circulating in blood plasma. It is also desirable that such dNTP/rNTP analogs possess selective substrate properties towards viral enzymes and be hydrophobic enough to penetrate into the cell or be able to be bound by membrane proteins which would facilitate their transportation into cells. We present the biological evaluation of carbocyclic analogs of L-d4NTP of I-III types in cell-free systems with HIV and avian myeloblastosis reverse transcriptases, DNA polymerases α and β, terminal deoxynucleotidyl transferase, as well as in Rat1 cell culture infected by...","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 4-5","pages":"1027-8"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15257779908041639","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21297804","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}
引用次数: 5
Synthesis and inhibitory activity against phosphatidylinositol 4-kinase of echiguanine analogs. 酯瓜氨酸类似物的合成及其对磷脂酰肌醇4-激酶的抑制活性。
Nucleosides & nucleotides Pub Date : 1999-04-01 DOI: 10.1080/15257779908041550
Y Saito, K Kato, K Umezawa
{"title":"Synthesis and inhibitory activity against phosphatidylinositol 4-kinase of echiguanine analogs.","authors":"Y Saito,&nbsp;K Kato,&nbsp;K Umezawa","doi":"10.1080/15257779908041550","DOIUrl":"https://doi.org/10.1080/15257779908041550","url":null,"abstract":"<p><p>N-Substituted-2-amino-4(3H)-7H-oxopyrrolo[2,3-d]pyrimidine-5-carbo xamides and their ribofuranosyl and 2',3'-dideoxyribofuranosyl derivatives were prepared as membrane permeable echiguanine analogs and tested for their ability to inhibit phosphatidylinositol (PI) 4-kinase. The ethylamide 5 and the corresponding ribofuranosyl compound 11 inhibited PI 4-kinase with IC50 values of 0.02 and 2.4 micrograms/ml, respectively.</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 4-5","pages":"713-4"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15257779908041550","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21298260","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}
引用次数: 3
Synthesis and testing of new modified nucleosides. 新修饰核苷的合成与测试。
Nucleosides & nucleotides Pub Date : 1999-04-01 DOI: 10.1080/15257779908041490
M E Jung, C J Nichols, O Kretschik, Y Xu
{"title":"Synthesis and testing of new modified nucleosides.","authors":"M E Jung,&nbsp;C J Nichols,&nbsp;O Kretschik,&nbsp;Y Xu","doi":"10.1080/15257779908041490","DOIUrl":"https://doi.org/10.1080/15257779908041490","url":null,"abstract":"<p><p>New efficient routes for the high-yielding synthesis of several classes of modified nucleosides have been developed. We have prepared both the D- and L-enantiomers of the methylene-expanded oxetanocin isonucleosides 1a-c and the L-2',3'-dideoxy isonucleosides 2abc (both the oxa and thia analogues) as well as new routes for the preparation of L-ribose and 2-deoxy L-ribose 3ab and their modified nucleosides 4.</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 4-5","pages":"541-6"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15257779908041490","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21298363","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}
引用次数: 11
Potent anti-hepatitis B viral activity and inhibition of bacteriophage T7 RNA polymerase by a "fat" nucleoside and its 5'-triphosphate derivative: synthetic, biochemical, and biological studies of 4,8-diamino-6-imino-6H-1-beta-D-ribofuranosyl-imidazo[4,5-E] [1,3]diazepine-5'-triphosphate. 一种“脂肪”核苷及其5′-三磷酸衍生物对噬菌体T7 RNA聚合酶的有效抗乙型肝炎病毒活性和抑制作用:4,8-二氨基-6-亚胺- 6h -1- β -d -核呋喃基-咪唑[4,5- e][1,3]二氮平-5′-三磷酸的合成、生化和生物学研究
Nucleosides & nucleotides Pub Date : 1999-04-01 DOI: 10.1080/15257779908041574
M Bretner, D Beckett, R S Hosmane
{"title":"Potent anti-hepatitis B viral activity and inhibition of bacteriophage T7 RNA polymerase by a \"fat\" nucleoside and its 5'-triphosphate derivative: synthetic, biochemical, and biological studies of 4,8-diamino-6-imino-6H-1-beta-D-ribofuranosyl-imidazo[4,5-E] [1,3]diazepine-5'-triphosphate.","authors":"M Bretner,&nbsp;D Beckett,&nbsp;R S Hosmane","doi":"10.1080/15257779908041574","DOIUrl":"https://doi.org/10.1080/15257779908041574","url":null,"abstract":"<p><p>The title nucleoside, 4,8-diamino-6-imino-6H-1-beta-d-ribofuranosylimidazo[4,5-e][1,3]-d iazepine, exhibited potent anti-hepatitis B viral activity with minimum toxicity in vitro, and its 5'-triphosphate derivative strongly inhibited the bacteriophage T7 RNA polymerase.</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 4-5","pages":"837-8"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15257779908041574","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21299260","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}
引用次数: 3
Resistance profiles of (+)2'-deoxy-3'-oxa-4'-thiocytidine and (-)2'-deoxy-3'-oxa-4'-thio-5-fluorocytidine. (+)2'-脱氧-3'-氧-4'-硫代胞苷和(-)2'-脱氧-3'-氧-4'-硫-5-氟代胞苷的抗性谱。
Nucleosides & nucleotides Pub Date : 1999-04-01 DOI: 10.1080/15257779908041564
N Richard, H Salomon, M Oliveira, R Rando, M A Wainberg
{"title":"Resistance profiles of (+)2'-deoxy-3'-oxa-4'-thiocytidine and (-)2'-deoxy-3'-oxa-4'-thio-5-fluorocytidine.","authors":"N Richard,&nbsp;H Salomon,&nbsp;M Oliveira,&nbsp;R Rando,&nbsp;M A Wainberg","doi":"10.1080/15257779908041564","DOIUrl":"https://doi.org/10.1080/15257779908041564","url":null,"abstract":"<p><p>Resistant variants were selected in vitro against two novel nucleoside analogues, (+) dOTC and (-) dOTFC using the HIV-1 molecular clone HXB2D. The variants obtained displayed 6.5-fold and 10-fold resistance to these compounds, respectively. Cloning and sequencing of the RT genes of the selected viruses identified two mutations, M184I for (+) dOTC and M184V for (-) dOTFC. Results with mutated recombinant clones of HXB2D confirmed the importance of these mutations in MT-4 cells. The resistance profiles of clinical samples with wild-type or 3TC-resistant phenotypes were also studied; low to moderate levels of cross-resistance were observed against the novel compounds.</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 4-5","pages":"773-8"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15257779908041564","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21299348","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}
引用次数: 1
Structural determinants of HIV-1 reverse transcriptase stereoselectivity towards (beta)-L-deoxy- and dideoxy-pyrimidine nucleoside triphosphates: molecular basis for the combination of L-dideoxynucleoside analogs with non-nucleoside inhibitors in anti HIV chemotherapy. HIV-1逆转录酶对(β)- l -脱氧和二脱氧嘧啶核苷三磷酸立体选择性的结构决定因素:l -二脱氧核苷类似物与非核苷抑制剂联合抗HIV化疗的分子基础
Nucleosides & nucleotides Pub Date : 1999-04-01 DOI: 10.1080/15257779908041566
G Maga, M Amacker, U Hübscher, G Gosselin, J L Imbach, C Mathé, A Faraj, J P Sommadossi, S Spadari
{"title":"Structural determinants of HIV-1 reverse transcriptase stereoselectivity towards (beta)-L-deoxy- and dideoxy-pyrimidine nucleoside triphosphates: molecular basis for the combination of L-dideoxynucleoside analogs with non-nucleoside inhibitors in anti HIV chemotherapy.","authors":"G Maga,&nbsp;M Amacker,&nbsp;U Hübscher,&nbsp;G Gosselin,&nbsp;J L Imbach,&nbsp;C Mathé,&nbsp;A Faraj,&nbsp;J P Sommadossi,&nbsp;S Spadari","doi":"10.1080/15257779908041566","DOIUrl":"https://doi.org/10.1080/15257779908041566","url":null,"abstract":"<p><p>We have compared the HIV-1 RT mutants containing the single substitutions L100I, K103N, V106A, V179D, Y181I and Y188L, known to confer NNI-resistance in treated patients, to HIV-1 RT wt for their sensitivity towards inhibition by D- and L-deoxy- and dideoxy-nucleoside tiphosphates. The results showed a differential effect of the substitutions on the affinity for both D- and L-enantiomers of deoxy- and dideoxy-nucleoside triphosphates and provide a rationale for the utilization of L-dideoxynucleoside analogs with NNI in combination chemotherapy.</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 4-5","pages":"795-805"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15257779908041566","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21299352","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}
引用次数: 3
Stereospecific synthesis and antiviral activities of beta-L-2',3'-dideoxy-5-chloropyrimidine nucleoside derivatives. β - l -2′,3′-二脱氧-5-氯嘧啶核苷衍生物的立体特异性合成及其抗病毒活性。
Nucleosides & nucleotides Pub Date : 1999-04-01 DOI: 10.1080/15257779908041526
C Pierra, G Gosselin, J P Sommadossi, A Faraj, E De Clercq, J Balzarini, J L Imbach
{"title":"Stereospecific synthesis and antiviral activities of beta-L-2',3'-dideoxy-5-chloropyrimidine nucleoside derivatives.","authors":"C Pierra,&nbsp;G Gosselin,&nbsp;J P Sommadossi,&nbsp;A Faraj,&nbsp;E De Clercq,&nbsp;J Balzarini,&nbsp;J L Imbach","doi":"10.1080/15257779908041526","DOIUrl":"https://doi.org/10.1080/15257779908041526","url":null,"abstract":"<p><p>Several 5-chlorouracil and 5-chlorocytosine beta-L-dideoxynucleosides were stereospecifically synthesized and their activities against human immunodeficiency virus (HIV) and hepatitis B virus (HBV) were examined in cell culture.</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 4-5","pages":"643-4"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15257779908041526","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21298249","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}
引用次数: 1
Hydrolysis of some mRNA 5'-cap analogs catalyzed by the human Fhit protein--and lupin ApppA hydrolases. 由人类Fhit蛋白和lupin ApppA水解酶催化的一些mRNA 5'-cap类似物的水解。
Nucleosides & nucleotides Pub Date : 1999-04-01 DOI: 10.1080/15257779908041666
E Bojarska, R Kraciuk, J Wierzchowski, Z Wieczorek, J Stepiński, M Jankowska, E Starzyńska, A Guranowski, E Darzynkiewicz
{"title":"Hydrolysis of some mRNA 5'-cap analogs catalyzed by the human Fhit protein--and lupin ApppA hydrolases.","authors":"E Bojarska,&nbsp;R Kraciuk,&nbsp;J Wierzchowski,&nbsp;Z Wieczorek,&nbsp;J Stepiński,&nbsp;M Jankowska,&nbsp;E Starzyńska,&nbsp;A Guranowski,&nbsp;E Darzynkiewicz","doi":"10.1080/15257779908041666","DOIUrl":"https://doi.org/10.1080/15257779908041666","url":null,"abstract":"<p><p>Hydrolysis of the following four cap analogs: m7G(5')ppp(5')A, m7G(5')ppp(5')m6A, m7G(5')ppp(5')m2'OG and m7G(5')ppp(5')2'dG catalyzed by homogeneous human Fhit protein and yellow lupin Ap3A hydrolase has been investigated. The hydrolysis products were identified by HPLC analysis and the K(m) and Vmax values calculated based on the data obtained by the fluorimetric method.</p>","PeriodicalId":19222,"journal":{"name":"Nucleosides & nucleotides","volume":"18 4-5","pages":"1125-6"},"PeriodicalIF":0.0,"publicationDate":"1999-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15257779908041666","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"21297733","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}
引用次数: 3
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