REVERSIBLE TERMINATORS FOR EFFICIENT SEQUENCING BY SYNTHESIS

摘要

The invention relates to compounds of general structure (I) or salts thereof, wherein B is a nucleobase, X and Y independently are oxygen or sulphur, Z is a chemical group characterized by strong electron withdrawing properties, R1 is hydrogen, hydroxyl or a protected hydroxyl, R2 and R3 are together or separately hydrogen or a hydrocarbyl, R4 is hydrogen or a chemical moiety consisting of a linker molecule L, linking a detectable group to the rest of the structure (I), R5 is hydrogen or an additional electron withdrawing group. R5 can be identical with Z or different. R6 is hydrogen or a chemical moiety consisting of a linker unit L, a cleavable group and a detectable group joined together in the following order R6 = -L-cleavable group-detectable group. The detectable group is placed either on R4 or R6 or is absent, thus either R4 is hydrogen and the detectable group is placed on R6, or R6 is hydrogen and the detectable group is placed on R4, or both R4 and R6 are hydrogen. Numbers m and n are independently 0 or 1. Compounds of formula (I) are useful as reversible chain extension terminators. The invention also relates to the use of the compounds (I) in nucleic acid sequencing as well as to a method of preparing compounds of Formula (I).