Solubilized Phospholipids Stabilize Polymerases Without Light Scattering

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Solution Overview

Problem

Existing polymerases face stability issues under storage and reaction conditions, with long-chain phosphatidylcholine phospholipids being insoluble and causing light scattering in activity assays, limiting their effectiveness in polymerase-dependent amplification reactions.

Innovation Solution

A composition is developed with a solubilized long-chain phospholipid, having a tail with at least 8 carbons, which acts as a stabilizer for polymerases, enhancing their activity by at least 3-fold when used in conjunction with an amphipathic solubilizer, allowing the phospholipid to remain in solution and improve polymerase stability and activity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If long-chain phosphatidylcholine phospholipids are used to stabilize polymerases, then polymerase stability is improved, but solubility deteriorates and light scattering increases

Engineering Contradiction:

Improvepolymerase stabilityVSAvoidlight scattering

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent uses short-chain phospholipids (with 1-7 carbon atoms in the tail) as intermediary solubilizing agents that enable long-chain phospholipids (with 8 or more carbon atoms) to remain soluble in aqueous buffers. The short-chain phospholipids act as mediators that prevent aggregation and light scattering while maintaining the stabilizing effect on polymerases.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the carbon chain length parameter of phospholipids from long-chain (8+ carbons) to short-chain (1-7 carbons) to achieve solubility. By adjusting this critical physical parameter, the phospholipids can stabilize polymerases without forming light-scattering vesicles or liposomes.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If long-chain phospholipids are used to stabilize polymerases, then polymerase stability is improved, but vesicle formation occurs causing adverse effects

Engineering Contradiction:

Improvepolymerase stabilityVSAvoidvesicle formation

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Short-chain phospholipids serve as intermediary agents that prevent long-chain phospholipids from aggregating into vesicles or liposomes. The short-chain molecules intercalate between long-chain phospholipid molecules, disrupting the formation of ordered vesicular structures while maintaining soluble micellar aggregates that do not scatter light.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

By changing the tail length parameter of phospholipids from long (8+ carbons) to short (1-7 carbons), the patent alters the self-assembly behavior of phospholipids. Short-chain phospholipids form soluble micelles rather than insoluble vesicles, eliminating the need for extrusion equipment and complex liposome preparation procedures.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If phospholipids are used in suspension or matrix form, then polymerase stability is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvepolymerase stabilityVSAvoidmanufacturing simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent changes the physical state parameter of phospholipids from suspension/matrix form to solubilized form by using short-chain phospholipids (1-7 carbons). This parameter change allows phospholipids to be directly dissolved in aqueous buffers without requiring extrusion through polycarbonate membranes or complex homogenization procedures, greatly simplifying manufacturing.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

Short-chain phospholipids act as intermediary solubilizing agents that enable the direct dissolution of phospholipid stabilizers in aqueous buffers. This intermediary approach eliminates the need for specialized extrusion equipment and complex liposome preparation procedures, allowing simple mixing to achieve stable polymerase formulations.

Inventive Principle:

Principle #24Intermediary (Mediator)

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 solubilized long-chain phospholipids effectively stabilize polymerases during storage and reaction conditions, reversing activity loss and enhancing polymerase activity, as demonstrated by increased dNTP incorporation in assays, without the need for forming vesicles or liposomes, thus overcoming solubility and light scattering issues.

Implementation Method 1

a solubilized long-chain phospholipid in which the phospholipid comprises a tail with a carbon backbone of at least 8 carbons

Methodology Applied

Scientific EffectHydrophobic interaction: Hydrophobe

Data Source

PatentUS9315797B2Solubilized phospholipids for stabilizing nucleic acid polymerases

Publication Date: 2016.04.19 NEW ENGLAND BIOLABS INC

AI summary

Compositions and methods are provided that relate to solubilized phospholipids and their use in stabilizing nucleic acid polymerases. For example, a phospholipid with a tail containing at least 8 carbons can be solubilized in the presence of an amphipathic molecule.