Random G-Deficient Primers for Consistent Whole Genome Amplification
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Solution Overview
Problem
Current methods for nucleic acid amplification, such as PCR and whole genome amplification, face challenges with high cost, inadequate DNA size, and lot-to-lot variability in primer synthesis, particularly with random primers, which hinder consistent and sensitive amplification results.
Innovation Solution
The use of random G-deficient primers, which are synthesized with controlled production methods to ensure consistency and efficiency in nucleic acid amplification, allowing for effective replication and displacement without compromising sensitivity or amplification advantages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If random primers are used for whole genome amplification, then amplification coverage is improved, but lot-to-lot variability in primer synthesis increases
Solution Approach 1:
The primer pool is segmented into multiple individual primer sequences (e.g., 50-200 different primers) rather than using a single random primer mixture. Each primer is individually synthesized and characterized, ensuring consistent quality while collectively providing comprehensive genome coverage through their diverse sequences.
Solution Approach 2:
The invention changes the synthesis approach from random mixture to controlled individual synthesis. By defining specific parameters for each primer (sequence, length, modifications) and synthesizing them individually with validated protocols, the method achieves both consistent manufacturing and effective random-like coverage.
2Reliability
If traditional random primers are used, then amplification sensitivity is maintained, but amplification efficiency varies between batches
Solution Approach 1:
Each primer in the set is individually characterized and validated for its amplification performance. This feedback loop ensures that only primers meeting specified efficiency criteria are included in the final set, guaranteeing consistent and reliable amplification sensitivity across different batches while maintaining high productivity.
3Ease of manufacture
If random primer mixtures are synthesized, then cost is reduced, but quality control becomes difficult
Solution Approach 1:
The invention changes from synthesizing one large random mixture to synthesizing multiple defined primer sequences individually. This allows application of standard quality control parameters to each primer (purity, concentration, sequence accuracy) while maintaining cost-effectiveness through optimized synthesis protocols and automated pooling.
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
Random G-deficient primers provide consistent and efficient amplification of nucleic acid sequences, overcoming the limitations of random primer synthesis, including reduced variability and maintaining high sensitivity, as demonstrated by comparable or superior amplification efficiency to traditional random primers.
Implementation Method 1
the primers are random G-deficient primers... under conditions that promote hybridization between the random G-deficient primers and the target sequence
Implementation Method 2
DNA polymerase, and a target sample, wherein the primers are random G-deficient primers, and incubating the target sample under conditions that promote replication of the target sequence
Implementation Method 3
Amplification proceeds by replication initiated at each primer and continuing through the target nucleic acid sequence, with the growing strands encountering and displacing previously replicated strands
Data Source
AI summary
Disclosed are compositions and methods for random amplification of nucleic acid sequences of interest using random-G-deficient primers. Also disclosed are methods of randomly amplifying a target nucleic acid sequence using random G-deficient primers alone or in combination with random, partially random, or specific primers.