Bread-Making Yeast Strain for Sugar-Range and Cold Dough Stability
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Solution Overview
Problem
Conventional Korean yeast strains like SPC-SNU 70-1 are unsuitable for European bread with no sugar or sweet bread with high sugar content due to low fermentation power and are not suitable for refrigerated or frozen dough distribution due to fermentation at low temperatures, leading to quality control issues.
Innovation Solution
Development of Saccharomyces cerevisiae SPC Y76LT, which exhibits excellent fermentation characteristics across various sugar concentrations, minimizes fermentation at refrigerated temperatures, and maintains fermentation power after freeze-storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional yeast strains like SPC-SNU 70-1 are used, then fermentation power is adequate in some bread types, but fermentation power becomes insufficient in European bread with no sugar or sweet bread with high sugar content
Solution Approach 1:
The yeast strain has been genetically modified to alter its metabolic parameters, specifically enhancing its ability to ferment across a wide range of sugar concentrations. This includes modifying enzyme systems such as invertase and maltase to function efficiently whether sugar is abundant or scarce, thereby resolving the contradiction between maintaining high fermentation power and adapting to varying sugar environments.
2Productivity
If conventional yeast strains are used for refrigerated or frozen dough distribution, then fermentation can proceed during storage, but this leads to quality control issues and makes quality changes difficult to minimize
Solution Approach 1:
The yeast strain exhibits dynamic responsiveness to temperature changes, being engineered to remain metabolically active at optimal fermentation temperatures while automatically reducing its metabolic rate and fermentation activity at refrigerated temperatures. This temperature-dependent dynamic behavior allows the yeast to maintain productivity when needed while ensuring reliability and quality control stability during refrigerated or frozen distribution.
3Ease of operation
If yeast fermentation is active at low temperatures, then fermentation can occur during distribution, but this causes quality changes and makes quality control difficult
Solution Approach 1:
The yeast strain incorporates temperature-sensitive regulatory mechanisms that act as a feedback system. When temperature drops to refrigerated levels, the yeast automatically receives a signal to reduce its metabolic activity and fermentation rate, preventing unwanted fermentation during distribution. This feedback-controlled behavior maintains manufacturing precision and quality consistency while preserving fermentation flexibility under appropriate conditions.
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
Saccharomyces cerevisiae SPC Y76LT provides wide applicability in bread with varying sugar content, suppresses fermentation during refrigerated distribution, and maintains fermentation power after freezing, ensuring consistent bread quality.
Implementation Method 1
yeast is involved in fermentation and is a key factor for baking that determines taste, aroma, and flavor
Implementation Method 2
excellent low-temperature sensitivity (minimized fermentation and metabolism at low temperatures)
Implementation Method 3
superior freeze-storage properties
Data Source
AI summary
The present invention pertains to (Saccharomyces cerevisiae) SPC Y76LT (KCTC 14767BP). The yeast strain (SPC Y76LT) of the present invention exhibits excellent fermentation efficiency across various sugar contents and thus can be applied to a wide variety of breads with differing sugar levels. Furthermore, the strain of the present invention shows reduced fermentation activity at low temperatures, which leads to minimal quality changes during refrigerated distribution, and thus is suitable for refrigerated dough distribution. Additionally, the dough made using the strain of the present invention retains its superior fermentation capabilities even after being stored in a frozen state and then thawed, and thus is suitable for frozen dough distribution.