← Back to Patent Explorer
US4772691A Expired / Lapsed US ⏱️ 0.0 years remaining

Chemically cleavable nucleotides

Assignee: Medical College of Wisconsin
•
Filing: 1985-06-05
•
Granted: 1988-09-20
•
Expires: 2005-06-05
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract Novel biotinylated nucleotides have a chemically cleavable linker arm between a biotin and an organic basic group. They are useful in a method of isolating target macromolecules from crude physiological mixtures. The biotinylated nucleotides are bound via their organic basic groups to macromolecules having an affinity for the target macromolecules and brought into contact with the target macromolecules to form a biotinylated nucleotide-affinity macromolecule - target macromolecule complex. The complex thus obtained is brought into contact with immobilized avidin whereupon the biotin moeity binds to the avidin. The complex and avidin are washed to remove undesired substances and then the chemically cleavable bond in the nucleotide is cleaved to obtain the affinity-macromolecule - target macromolecule complex from which the target macromolecule can be obtained.

Inventors

  • 👤 Timothy M. Herman

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-07 05:08
CPC Classifications
C; C12; C12N; C12N15/00; C12N15/09; C12N15/10; C12N15/1003; C07; C07H; C07H21/00; C12Q; C12Q1/00; C12Q1/68; C12Q1/6813; C12Q1/6816; C12Q1/6823; C12Q1/6827

Claims Analysis

Total Claims: 11
Claim 1
Independent Claim 130 words
A compound having the structure: ##STR12## wherein B is selected from purine, 7-deazapurine and pyrimidine provided that when B is purine or 7-deazapurine, it is attached at the N 9 -position of purine or deazapurine, and when B is pyrimidine, it is attached at the N 1 -position; wherein A represents biotin or iminobiotin wherein ...D... is selected from the formulae: ##STR13## D is a chemically cleavable disulfide bond and ...D... joins B and A, provided that if B is purine, the linkage is attached to the 8-position of the purine, if B is 7-deazapurine, the linkage is attached to the 7-position of the deazapurine, and if B is pyrimidine, the linkage is attached to the 5-position of the pyrimidine; and wherein each of x, y and z represents ##STR14##
Claim 2
Dependent Claim 130 words
A compound having the structure: ##STR12## wherein B is selected from purine, 7-deazapurine and pyrimidine provided that when B is purine or 7-deazapurine, it is attached at the N 9 -position of purine or deazapurine, and when B is pyrimidine, it is attached at the N 1 -position; wherein A represents biotin or iminobiotin wherein ...D... is selected from the formulae: ##STR13## D is a chemically cleavable disulfide bond and ...D... joins B and A, provided that if B is purine, the linkage is attached to the 8-position of the purine, if B is 7-deazapurine, the linkage is attached to the 7-position of the deazapurine, and if B is pyrimidine, the linkage is attached to the 5-position of the pyrimidine; and wherein each of x, y and z represents ##STR14##
Claim 3
Dependent Claim 11 words
A compound in accordance with claim 1 wherein A is biotin.
Claim 4
Dependent Claim 11 words
A compound in accordance with claim 1 wherein A is iminobiotin.
Claim 5
Dependent Claim 14 words
A compound in accordance with claim 1 wherein B is purine, deazapurine, or pyrimidine.
Claim 6
Dependent Claim 29 words
A compound of the formula: ##STR15## in which D is a chemically cleavable disulfide bond and W is a single bond or ##STR16## and n is 2 to 6.
Claim 7
Dependent Claim 29 words
A compound of the formula: ##STR15## in which D is a chemically cleavable disulfide bond and W is a single bond or ##STR16## and n is 2 to 6.
Claim 8
Dependent Claim 6 words
A compound of the formula: ##STR17##
Claim 9
Dependent Claim 6 words
A compound of the formula: ##STR17##
Claim 10
Dependent Claim 6 words
A compound of the formula: ##STR18##
Claim 11
Dependent Claim 6 words
A compound of the formula: ##STR18##

References Cited (Backward Citations)

GB638792A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1991-09-20 1992-03-21 1992-09-20 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1995-09-20 1996-03-21 1996-09-20 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1999-09-20 2000-03-21 2000-09-20 $7700.00 Window Closed / Lapsed

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag