The United States of America, As Represented by the Secretary, Department of Health and Human Services

The United States of America As Represented by the Secretary of

The United States of America As Represented by the Department of Health

Mary E Hawkins

Wolfgang Pfleiderer

Frank Balis

Michael D Davis

The invention provides pteridine nucleotides of formula (I) which are highly fluorescent and which can be used in the chemical synthesis of fluorescent oligonucleotide. The invention further provides for fluorescent oligonucleotide comprising one or more pteridine nucleotides. In addition the invention provides for pteridine nucleotide triphosphates which may be used as the constituent monomers in DNA amplification procedures. The pteridine nucleotides are more stable and possess higher quantum yields than structurally similar pteridine nucleotides.

Pteridine nucleotide analogs

This invention provides methods and compositions for the detection of nucleic acid interactions with other nucleic acids or with proteins. The methods generally utilize a nucleic acid (e.g., an oligonucleotide) that contains one or more fluorescent nucleotide analogues. The fluorescence of the nucleotide analogues is quenched (reduced) when they are incorporated into the oligonucleotide. Alteration of the normal conformation of the oligonucleotide by hybridization (e.g. to form a loop) or by protein binding reduces and/or eliminates the quench thereby causing a detectable increase in fluorescence.

Fluorescent nucleotide analog hairpin formation for detection of nucleic acid hybridization

The invention provides novel pteridine nucleotides which are highly fluorescent under physiological conditions and which may be used in the chemical synthesis of fluorescent oligonucleotides. The invention further provides for fluorescent oligonucleotides comprising one or more pteridine nucleotides. In addition the invention provides for pteridine nucleotide triphosphates which may be used as the constituent monomers in DNA amplification procedures.

Pteridine nucletide analogs as fluorescent DNA probes

The invention provides novel pteridine nucleotides which are highly fluorescent under physiological conditions and which may be used in the chemical synthesis of fluorescent oligonucleotidcs. The invention further provides for fluorescent oligonucleotides comprising one or more pteridine nucleotides. In addition the invention provides for pteridine nucleotide triphosphates which may be used as the constituent monomers in DNA amplification procedures.

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Potomac, MD, United States of America

Mary E Hawkins