Cellulase, Beta Glucanase, Cellulose Hydrolase, Endoglucanase, Cellobiohydrolase, 9012-54-8

Cellulase, Beta Glucanase, Cellulose Hydrolase, Endoglucanase, Cellobiohydrolase, 9012-54-8

CELLULASE (CELLULASE ENZYME)

Cellulase / Beta-1,4-Glucanase / Cellulose Hydrolase / Endoglucanase / Cellobiohydrolase

• CAS Number: 9012-54-8

• EC Number: 232-734-4

• Enzyme Class: EC 3.2.1.4 / EC 3.2.1.91 / EC 3.2.1.21

SECTION 1: PRODUCT DEFINITION AND CHEMICAL IDENTITY

Description:
Cellulase is an enzyme complex that breaks down cellulose fibers and hydrolyzes plant cell walls. Cellulose is a linear polysaccharide formed by glucose units linked by beta-1,4 glycosidic bonds. The cellulase complex consists of three main enzyme components: endoglucanase, exoglucanase (cellobiohydrolase), and beta-glucosidase. These enzymes work synergistically to convert cellulose to glucose. In the food industry, it is widely used especially in fruit juice production to increase efficiency by breaking down cell walls and to provide clarity. It is also used in the textile industry (stone-washing of cotton fabrics), paper industry, and biofuel production.

SECTION 2: SYNONYMS AND OTHER NAMES

SECTION 3: ENZYMATIC STRUCTURE

3.1. Molecular Structure
Cellulase is a complex composed of multiple enzyme components. Each component has a different catalytic activity. The enzyme complex typically includes the following components:

1. Endoglucanase (EC 3.2.1.4): Randomly cleaves beta-1,4 bonds in the interior of the cellulose chain, creating nicks in the chain.

2. Exoglucanase / Cellobiohydrolase (EC 3.2.1.91): Removes cellobiose (two glucose) units from the ends of cellulose chains.

3. Beta-Glucosidase (EC 3.2.1.21): Hydrolyzes cellobiose and short-chain cellooligosaccharides to glucose.

These three enzymes work synergistically to completely convert cellulose to glucose. Molecular weight varies between 20,000-100,000 Da depending on each enzyme component.

3.2. Catalytic Mechanism
Cellulase hydrolyzes beta-1,4 glycosidic bonds of cellulose through an acid-base catalysis mechanism:

1. Endoglucanase: Randomly cleaves bonds in the interior of the cellulose chain, creating new chain ends.

2. Exoglucanase: Removes cellobiose units from the created chain ends.

3. Beta-Glucosidase: Hydrolyzes cellobiose and other short-chain cellooligosaccharides to glucose.

The synergistic action of these three enzymes enables effective breakdown of cellulose. The synergistic effect provides much higher total hydrolysis yield than the activity of a single enzyme.

3.3. Enzyme Complex Components

3.4. Basic Structural Properties

SECTION 4: PHYSICAL AND CHEMICAL PROPERTIES

SECTION 5: ENZYMATIC ACTIVITY AND REACTION

SECTION 6: REACTION MECHANISM

The cellulase complex catalyzes the hydrolysis of cellulose through a mechanism involving the following steps:

6.1. Cellulose Binding
The enzyme complex binds to cellulose fibers through cellulose binding domains (CBM). This binding enables the enzyme to approach the substrate and perform effective hydrolysis.

6.2. Endoglucanase Activity
Endoglucanase randomly cleaves β-1,4 glycosidic bonds in the interior of the cellulose chain. This creates new ends in the cellulose chain and shortens the chain length. Endoglucanase has preferential affinity for amorphous regions.

6.3. Exoglucanase Activity
Exoglucanase (cellobiohydrolase) removes cellobiose units starting from the chain ends created by endoglucanase. Exoglucanase can also attack crystalline cellulose regions.

6.4. Beta-Glucosidase Activity
Beta-glucosidase hydrolyzes cellobiose and other short-chain cellooligosaccharides to glucose. This step prevents product inhibition (cellobiose accumulation) and provides higher hydrolysis yield.

6.5. Synergistic Effect
The combined action of the three enzyme components provides much higher total hydrolysis yield than the activity of each component alone. This synergistic effect is explained by the mechanical attack on different regions of the cellulose structure.

SECTION 7: REACTION EQUATIONS

7.1. Complete Hydrolysis of Cellulose
(C₆H₁₀O₅)n + n H₂O → n C₆H₁₂O₆ (Glucose)

7.2. Endoglucanase Reaction
Cellulose + H₂O → Cellooligosaccharides

7.3. Exoglucanase Reaction
Cellulose + H₂O → Cellobiose

7.4. Beta-Glucosidase Reaction
Cellobiose + H₂O → 2 Glucose

7.5. Enzyme Inactivation (Thermal)
Cellulase (active) → Cellulase (inactive) (≥60°C, 10-15 minutes)

7.6. Product Inhibition
Cellulase + Glucose → Cellulase-Glucose Complex (inactive)

SECTION 8: CELLULASE TYPES

SECTION 9: APPLICATIONS AND INDUSTRIAL USES

9.1. Fruit Juice and Beverage Industry

Example Recipe – Fruit Juice Yield Improvement:

• Fruit pulp (apple, grape, pear, etc.): 1000 kg

• Cellulase: 10-100 g (depending on activity)

• Application temperature: 45-55°C

• Incubation time: 1-4 hours

Heat fruit pulp to 45-55°C. Dissolve cellulase in a small amount of water and add to the mixture. Incubate for the specified time. Press or centrifuge the pulp to collect juice. Apply additional treatment for clarification.

9.2. Beer and Fermentation Industry

9.3. Textile Industry (Stone-Washing)

9.4. Paper and Pulp Industry

9.5. Biofuel and Biorefinery

9.6. Animal Feed

9.7. Other Applications

SECTION 10: ALTERNATIVES AND COMPARISON

10.1. Acid Hydrolysis (Chemical)

10.2. Amylase (EC 3.2.1.1)

10.3. Pectinase (EC 3.2.1.15)

10.4. Hemicellulase (EC 3.2.1.8)

SECTION 11: TOXICOLOGY AND SAFETY

11.1. Acute Toxicity

11.2. Regulatory Status

SECTION 12: GHS CLASSIFICATION (Powder Form)

Signal Word: Danger

Hazard Pictograms: GHS07 (Exclamation mark), GHS08 (Health Hazard)

Hazard Statements (H-Codes):

• H334: May cause allergy or asthma symptoms if inhaled

• H319: Causes serious eye irritation

• H335: May cause respiratory irritation

Safety Statements (Historical):

SECTION 13: PRECAUTIONARY STATEMENTS (P-CODES)

SECTION 14: FIRST AID MEASURES

SECTION 15: FIREFIGHTING MEASURES

SECTION 16: ACCIDENTAL RELEASE MEASURES

SECTION 17: STORAGE AND SHELF LIFE

SECTION 18: PACKAGING OPTIONS

SECTION 19: TRANSPORT INFORMATION

SECTION 20: ENVIRONMENTAL INFORMATION

SECTION 21: REGULATORY STATUS

SECTION 22: FREQUENTLY ASKED QUESTIONS (FAQ)

Q1: Is cellulase safe for food applications?
A1: Yes. Cellulase is classified as GRAS (Generally Recognized As Safe) by the FDA and approved as a food enzyme by EFSA. It is widely used in fruit juice production, beer, and food processing. However, the powder form may cause allergic reactions when inhaled, so appropriate personal protective equipment should be used.

Q2: What is the role of cellulase in fruit juice production?
A2: Cellulase hydrolyzes cellulose fibers in fruit cell walls, breaking down cell walls. This increases fruit juice yield, reduces viscosity, and provides clarity. Additionally, it contributes to flavor development by increasing the release of flavor compounds through cell wall breakdown.

Q3: What enzymes does the cellulase complex contain?
A3: The cellulase complex consists of three main enzyme components: (1) Endoglucanase - cleaves the cellulose chain internally, (2) Exoglucanase (Cellobiohydrolase) - removes cellobiose from ends, (3) Beta-Glucosidase - hydrolyzes cellobiose to glucose. These three enzymes work synergistically to convert cellulose to glucose.

Q4: Is cellulase suitable for vegan and halal products?
A4: Microbial (fungal or bacterial) sourced cellulases are suitable for vegan and halal certification. Since the product is produced from microorganisms such as Aspergillus, Trichoderma, or Bacillus, it contains no animal ingredients. Relevant certificates can be obtained from manufacturers.

Q5: What is the shelf life of cellulase?
A5: In unopened original packaging, stored in a cool (4-25°C) and dry place away from direct sunlight, a shelf life of 12-24 months is recommended. For long-term storage, storing at 4°C minimizes activity loss.

Q6: How should cellulase be stored?
A6: Store in a cool (preferably 4-25°C), dry, well-ventilated area in tightly closed containers. Moisture, high temperature (>40°C), and direct sunlight cause activity loss. Contact with heavy metals (copper, mercury) should be avoided.

Q7: What are the optimum working conditions for cellulase?
A7: The optimum pH of cellulase is between 4.5-6.0, and the optimum temperature varies between 45-55°C depending on the source. Fungal cellulases typically show best activity around 45-50°C. The enzyme is stable up to 55°C and rapidly inactivated above 60°C. Glucose and cellobiose can cause product inhibition.

Q8: How is cellulase used in the textile industry?
A8: In the textile industry, cellulase is used in denim stone-washing to create a worn, aged appearance effect. It is also used in biopolishing of cotton fabrics to reduce fuzz, provide brightness and softness. Enzymatic treatment is more environmentally friendly than conventional stone-washing methods.

Q9: How is cellulase used in biofuel production?
A9: In biofuel production, cellulase is used to produce glucose from cellulosic biomass (corn stover, wheat straw, wood). Cellulase hydrolyzes cellulose in biomass to glucose, which is then fermented by yeast to produce ethanol. Enzymatic hydrolysis occurs under milder conditions and with fewer byproducts compared to acid hydrolysis.

Q10: What are the effects of inhaling cellulase powder?
A10: Cellulase powder, when inhaled, can cause allergic reactions, asthma-like symptoms, and respiratory tract irritation. Occupational asthma can develop upon repeated exposure to enzyme dust in food, textile, and biofuel industries. Therefore, a dust mask (P2/P3) must always be used when handling the powder form, and local exhaust ventilation should be provided.

SECTION 23: QUICK REFERENCE TABLE

SECTION 24: CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

1. Dust Control and Respiratory Sensitization: Cellulase powder can cause occupational asthma upon repeated exposure. Use local exhaust ventilation to prevent dust dispersion and always wear a dust mask (P2/P3). Liquid formulations are safer than powder forms.

2. Synergistic Effect: The three components of the cellulase complex (endoglucanase, exoglucanase, beta-glucosidase) work synergistically. In case of activity loss, check the presence of all components. A missing component significantly reduces total hydrolysis yield.

3. Activity Loss - Temperature: Cellulase is rapidly and irreversibly inactivated above 60°C. Strictly maintain application temperatures within the optimum range (45-55°C). Temperature control is critical in fruit juice production and textile processes.

4. Activity Loss - pH: Cellulase loses stability below pH 4.0 or above pH 7.0. Maintain application pH within the optimum range (4.5-6.0). Excessively acidic or basic conditions cause permanent enzyme inactivation.

5. Product Inhibition: Glucose and cellobiose inhibit cellulase activity (product inhibition). Reaction rate decreases at high sugar concentrations. Activity is higher in continuous systems or processes where product is removed.

6. Activity Loss - Heavy Metals: Mercury (Hg²⁺), copper (Cu²⁺), and other heavy metals inhibit cellulase. Avoid these metals in equipment that comes into contact with the enzyme. Stainless steel, HDPE, or glass materials are preferred.

7. Food Grade: Only FDA/EFSA-approved food-grade cellulase meeting specifications should be used in food applications. Industrial grade enzymes may contain impurities and are not suitable for human consumption.

8. Substrate Properties: Cellulase works more slowly on crystalline cellulose compared to amorphous cellulose. The surface area and crystallinity of the substrate (cellulose) directly affect hydrolysis rate. Substrate digestibility can be increased with pretreatment (mechanical, chemical).

BEST PRACTICE RECOMMENDATIONS:

• Storage: Store in a cool (4-25°C), dry, well-ventilated area in tightly closed containers. For long-term storage, +4°C (refrigeration) is recommended. Use within a short period after opening.

• Handling: Use protective gloves, dust mask (P2/P3), and protective goggles. To prevent dust dispersion, preferably use liquid formulations. Prepare working solutions fresh for each application.

• Substrate Preparation: Grind or homogenize cellulose-containing substrate (fruit pulp, cellulosic biomass) as finely as possible. Hydrolysis yield increases with increasing surface area.

• Dosage: Calculate the correct dosage according to enzyme activity. Check enzyme activity for each batch. Start with low dosage and adjust based on results. Typical dosage ranges are 0.01-0.1% for fruit juice applications and 0.5-2% for textile applications.

• Enzyme Inactivation: Inactivate the enzyme by heat treatment (≥60°C, 10-15 minutes) at the end of the process to prevent over-hydrolysis. For fruit juice products, pasteurization will inactivate residual enzyme activity.

• Quality Control: Perform activity testing for each batch. Maintain production and handling hygiene to prevent microbiological contamination. Monitor sugar formation and viscosity changes during processing for consistent product quality.

• Waste Management: Dispose of enzyme and contaminated materials in accordance with local regulations. Do not discharge into sewers. If released into wastewater, inactivate the enzyme by heat treatment before disposal.

LEGAL DISCLAIMER:

This Technical Data Sheet (TDS) is for informational purposes only and is prepared based on available technical data. The user is responsible for determining the suitability of the product for their specific application and for complying with all local, national, and international regulations. For complete safety, storage, handling, transport, waste, and regulatory compliance information, refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. Cellulase powder may cause sensitization when inhaled; appropriate protective equipment should be used. This document does not replace professional or medical advice.