deazaguanine

Deazaguanine is a modified nucleobase, specifically an analog of guanine. In deazaguanine, the nitrogen atom at position 7 in the guanine ring is replaced by a carbon atom. This structural modification has significant implications for its chemical properties and biological interactions. It is a purine derivative and is sometimes incorporated into nucleic acids to alter their properties. The change from nitrogen to carbon at the 7-position influences the hydrogen bonding patterns and electronic distribution of the molecule. Deazaguanine and its derivatives have found applications in various biochemical and biotechnological fields, including the study of DNA structure and function, as well as in the development of diagnostic tools and therapeutic agents. For example, the altered base pairing can affect the stability and recognition of DNA duplexes. Research has explored its use in modifying oligonucleotides for applications such as PCR (polymerase chain reaction) and sequencing. While not a standard component of naturally occurring DNA or RNA, synthetic deazaguanine-containing oligonucleotides can be created for specific experimental purposes. The synthesis and study of deazaguanine analogs continue to be an area of interest in medicinal chemistry and molecular biology.