Organic compounds -- part of the class 532-570 series – Organic compounds – Carbohydrates or derivatives
Reexamination Certificate
2000-12-18
2002-11-26
Riley, Jezia (Department: 1656)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carbohydrates or derivatives
C536S025300, C536S025320, C514S04400A, C546S270100, C546S271100, C548S311100, C548S312400
Reexamination Certificate
active
06486308
ABSTRACT:
FIELD OF THE INVENTION
The present invention is directed to new derivatives of oligonucleotides. More particularly, the present invention is directed to oligonucleotide derivatives wherein one or more minor groove binding molecules are covalently attached to the oligonucleotide. The oligonucleotide minor groove binding moiety conjugates show strong affinity to hybridize and strongly bind to complementary sequences of single or double stranded nucleic acids, and thereby have utility as sequence specific probes and as antisense and anti-gene therapeutic agents.
BRIEF DESCRIPTION OF THE PRIOR ART
Minor groove binding agents which non-covalently bind into the minor groove of double stranded DNA are known in the art. Intercalating agents which bind to double stranded DNA or RNA are also well known in the art. Intercalating agents are, generally speaking, flat aromatic molecules which non-covalently bind to double stranded DNA or RNA by positioning (intercalating) themselves between interfacing purine and pyrimidine bases of the two strands of double stranded DNA or RNA. U.S. Pat. No. 4,835,263 describes oligonucleotides which are covalently bound to an intercalating group. Such oligonucleotides carrying an intercalating group can be useful as hybridization probes.
SUMMARY OF THE INVENTION
The present invention relates to a covalently bound oligonucleotide and minor groove binder combination which includes an oligonucleotide having a plurality of nucleotide units, a 3′-end and a 5′-end, and a minor groove binder moiety covalently attached to at least one of said nucleotides. The minor groove binder is typically attached to the oligonucleotide through a linking group comprising a chain of no more than 15 atoms. The minor groove binder moiety is a radical of a molecule having a molecular weight of approximately 150 to approximately 2000 Daltons which molecule binds in a non-intercalating manner into the minor groove of double stranded DNA, RNA or hybrids thereof with an association constant greater than approximately 10
3
M
−1
.
In another aspect, the present invention relates to the process of synthesizing certain covalently bound oligonucleotide minor groove binder combinations, and to the manner of using such combinations for hybridization probe and related analytical and diagnostic, as well as therapeutic (anti-sense and anti-gene) purposes.
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Gamper Howard B.
Kutyavin Igor V.
Lukhtanov Eugeny A.
Meyer, Jr. Rich B.
Epoch Biosciences, Inc.
Riley Jezia
Townsend and Townsend / and Crew LLP
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