[EN] REAGENTS FOR REVERSIBLY TERMINATING PRIMER EXTENSION<br/>[FR] RÉACTIFS UTILISÉS POUR L'INTERRUPTION RÉVERSIBLE D'EXTENSION D'AMORCE
申请人:BENNER STEVEN ALBERT
公开号:WO2010110775A1
公开(公告)日:2010-09-30
This invention relates to the field of nucleic acid chemistry, more specifically to the field of compositions of matter that comprise triphosphates of modified 2'-deoxynucleosides and oligonucleotides that are formed when these are appended to the 3'-end of a primer, wherein said modifications comprise NH2 moiety attached to their 3'-hydroxyl group and a fluorescent species in a form of a tag affixed to the nucleobase via a linker that can be cleaved. Such compositions and their associated processes enable and improve the sequencing of oligonucleotides using a strategy of cyclic reversible termination, as outlined in US Patent 6,664,079. Most specifically, the invention concerns compositions of matter that are 5'-triphosphates of ribo- and 2'- deoxyribonucleosides carrying detectable tags and oligonucleotides that might be derived from them. The invention also concerns processes wherein a DNA polymerase, RNA polymerase, or reverse transcriptase synthesizes said oligonucleotides via addition of said triphosphates to a primer.
There are disclosed an antiviral agent which comprises a nucleoside of the formula:
wherein B is a thymin-1-yl group, a cytosin-1-yl group, an adenin-9-yl group or a guanin-9-yl group;
and R¹ is amino group when B being a thymin-1-yl group, a cytosin-1-yl group, an adenin-9-yl group or a guanin-9-yl group, -NHCHO when B being a thymin-1-yl group or an adenin-9-yl group, -N=CH₂ when B being a thymin-1-yl group, or -N=C(CH₃)₂ when B being a thymin-1-yl group or an adenin-9-yl group,
or a pharmaceutically acceptable salt thereof as an active therapeutic substance, and a pharmaceutical composition which comprises the nucleoside as mentioned above and a pharmaceutically.acceptable carrier, and a novel nucleoside used therefor.
Reagents for reversibly terminating primer extension
申请人:——
公开号:US08034923B1
公开(公告)日:2011-10-11
Processes are disclosed that use 3′-reversibly terminated nucleoside triphosphates to analyze DNA for purposes other than sequencing using cyclic reversible termination. These processes are based on the unexpected ability of terminal transferase to accept these triphosphates as substrates, the unexpected ability of polymerases to add reversibly and irreversibly terminated triphosphates in competition with each other, the development of cleavage conditions to remove the terminating group rapidly, in high yield, and without substantial damage to the terminated oligonucleotide product, and the ability of reversibly terminated primer extension products to capture groups. The presently preferred embodiments of the disclosed processes use a triphosphate having its 3′-OH group blocked as a 3′-ONH2 group, which can be removed in buffered NaNO2 and use variants of Taq DNA polymerase, including one that has a replacement (L616A).