Recombinant Polymerases for Broad-Temperature Isothermal Amplification
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Solution Overview
Problem
The existing methods for nucleic acid amplification, particularly isothermal amplification, are limited by the availability of polymerase enzymes that are active over a narrow temperature range, restricting their applicability in nucleic acid amplification assays.
Innovation Solution
Development of novel recombinant polymerases with amino acid sequences showing at least 70% sequence identity to specific SEQ IDs, which are active over a broad temperature range (51° C. to 85° C.), enabling efficient nucleic acid amplification across various templates including ssDNA, dsDNA, and RNA, with specific exonuclease activities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional DNA polymerases are used for isothermal amplification, then the amplification can be performed at constant temperature, but the polymerase activity is limited to narrow temperature ranges
Solution Approach 1:
The patent applies parameter changes by modifying the temperature range parameter of the polymerase enzyme. The novel polymerases are engineered to function at expanded temperature ranges (51-85°C) compared to conventional polymerases, allowing isothermal amplification to be performed at multiple constant temperatures while maintaining enzyme activity and stability.
2Reliability
If polymerases with narrow temperature activity ranges are used, then the enzyme activity is high at specific temperatures, but the applicability in nucleic acid amplification assays is restricted
Solution Approach 1:
The patent implements universality by creating polymerases that can function across multiple temperature conditions and with various nucleic acid templates (ssDNA, dsDNA, RNA). The novel polymerases serve multiple functions in different isothermal amplification assays, replacing the need for temperature-specific polymerases and expanding assay applicability while maintaining reliable enzyme activity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The recombinant polymerases provide stable and processive activity over a wide temperature range, enhancing the efficiency and versatility of nucleic acid amplification assays, particularly suitable for isothermal amplification techniques.
Implementation Method 1
One particularly useful class of enzymes is the polymerases, which can catalyze the polymerization of biomolecules (e.g., nucleotides or amino acids) into biopolymers (e.g., nucleic acids or peptides)
Implementation Method 2
Generally, the recombinant polymerase disclosed herein is capable of 3'-5' exonuclease activity
Data Source
AI summary
Provided herein are recombinant polymerases that are suitable for nucleic acid amplification assays. The recombinant polymerases disclosed herein are useful in many recombinant DNA techniques, in particular nucleic acid amplification. Also provided herein are methods of producing the recombinant polymerases.