Method for nucleic acid isolation by solid phase reversible binding of nucleic acids
First Claim
1. A method of reversibly binding nucleic acids non-specifically to a solid phase material having a surface coated with one or more functional groups with multiple amide bonds without relying on any crowding reagent, the method comprising the steps of:
- a) contacting a surface of a solid phase material coated with one or more functional groups with multiple amide bonds with a solution containing nucleic acids; and
b) adjusting the salt concentration and pH of the solution until suitable for binding the nucleic acids onto the surface of the solid phase material, thereby binding the nucleic acids non-specifically to the one or more functional groups with multiple amide bonds and therefore the solid phase material without relying on any crowding agent.
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Abstract
The invention includes a method for separating polynucleotides, such as DNA, RNA and PNA, from a solution containing polynucleotides by reversibly and non-specifically binding the polynucleotides to a solid surface having a functional amide group-coated surface. The materials containing a solid surface can be in the form of microparticles, fibers, beads, membranes, test tubes, pipette tips or microwells and can further comprise a magnetic core portion. The pH, salt and concentration of crowding reagent, such as polyethylene glycol or alcohol, of the solution is adjusted to levels which result in nucleic acid binding to the solid surface. The magnetic microparticles with bound polynucleotides are separated from the solution under mild alkaline conditions and the nucleic acids are eluted from the magnetic microparticles. Solutions having different nucleic acid concentrations can be normalized by restricting the availability of the solid phase surface.
11 Citations
27 Claims
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1. A method of reversibly binding nucleic acids non-specifically to a solid phase material having a surface coated with one or more functional groups with multiple amide bonds without relying on any crowding reagent, the method comprising the steps of:
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a) contacting a surface of a solid phase material coated with one or more functional groups with multiple amide bonds with a solution containing nucleic acids; and b) adjusting the salt concentration and pH of the solution until suitable for binding the nucleic acids onto the surface of the solid phase material, thereby binding the nucleic acids non-specifically to the one or more functional groups with multiple amide bonds and therefore the solid phase material without relying on any crowding agent. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23, 24, 25, 26, 27)
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14. A method of separating nucleic acids from a solution containing nucleic acids, comprising the steps of:
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a) combining a solid phase material surface-coated with one or more functional groups with multiple amide bonds and a solution containing nucleic acids, thereby producing a first combination; b) adjusting the salt concentration of the first combination until suitable for binding nucleic acids to the surface of the solid phase material, thereby producing a second combination comprising nucleic acids bound non-specifically to the one or more functional groups with multiple amide bonds and therefore the solid phase material without relying on any crowding agent; c) separating the solid phase material from the second combination; d) contacting the solid phase material separated in c) with the bound nucleic acids in an elution solution, whereby nucleic acids separate from the solid phase material and dissolve into the elution solution; and e) separating the solid phase material from the elution solution. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22)
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Specification