Recognition of Artificial Nucleobases by<i>E. coli</i>Purine Nucleoside Phosphorylase versus its Ser90Ala Mutant in the Synthesis of Base-Modified Nucleosides
作者:Ilja V. Fateev、Maria I. Kharitonova、Konstantin V. Antonov、Irina D. Konstantinova、Vasily N. Stepanenko、Roman S. Esipov、Frank Seela、Kartik W. Temburnikar、Katherine L. Seley-Radtke、Vladimir A. Stepchenko、Yuri A. Sokolov、Anatoly I. Miroshnikov、Igor A. Mikhailopulo
DOI:10.1002/chem.201501334
日期:2015.9.14
mechanism of recognition by the wild‐type (WT) E. coli purine nucleosidephosphorylase (PNP) versusitsSer90Alamutant. The results were analyzed from viewpoint of the role of the Ser90 residue and the structural features of the bases. It was found that the Ser90 residue of the PNP 1) plays an important role in the binding and activation of 8‐aza‐7‐deazapurines in the synthesis of their nucleosides, 2) participates
Ribonucleoside analogs with novel hydrogen bonding patterns
申请人:Benner Steven A.
公开号:US08389703B1
公开(公告)日:2013-03-05
This invention relates to nucleoside, nucleotide, and oligonucleotide analogs that incorporate non-standard nucleobase analogs, defined to be those that present a pattern of hydrogen bonds to a paired nucleobase analog in a complementary strand that is different from the pattern presented by adenine, guanine, cytosine, and thymine. The invention is specifically concerned with nucleotide analogs that present the donor-donor-acceptor, hydrogen bonding patterns on pyrimidine analogs, and especially those that are analogs of ribonucleotides, including protected ribonucleotides suitable for phosphoramidite-based synthesis of RNA. The heterocycles on these nucleoside analogs are aminopyridones that have electron withdrawing groups attached to the position analogous to the 5-position of the ring in standard pyrimidines, including nitro, cyano, and carboxylic acid derivatives.
Broad-spectrum inhibitor of viruses in the Flaviviridae family
申请人:Ojwang O. Joshua
公开号:US20060035848A1
公开(公告)日:2006-02-16
The present invention relates generally to the fields of chemistry and molecular biology. More particularly, it concerns the use of compounds to treat viral infection. In a preferred embodiment, 2-amino-8-(β-D-ribofuranosyl) imidazo [1,2-a]-s-triazine-4-one may be used to treat infection by viruses of the Flaviviridae family.
Imidazo[1,2-a]-s-triazines including the base, the nucleoside, derivatives of the nucleoside, and the 5' nucleotide are prepared and are useful as antiviral Agents against RNA viruses.
5-Aza-7-deazapurine derivatives for treating Flaviviridae
申请人:Gosselin Gilles
公开号:US20060040944A1
公开(公告)日:2006-02-23
This invention is directed to a method for treating a host, especially a human, infected with hepatitis C, flavivirus and/or pestivirus, comprising administering to that host an effective amount of an anti-flavivirus or anti-pestivirus, biologically active compound has a 5-aza-7-deazapurine moiety. The 5-aza-7-deazapurine moiety may be substituted or unsubstituted, and may comprise a nucleoside analogue, or a salt or prodrug thereof. The compound of the present invention may be administered alone or in combination with another anti-hepatitis C, anti-flavivirus and/or anti-pestivirus agent.