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L7773

Sigma-Aldrich

Lysozyme from chicken egg white

aseptically filled

Synonym(s):

Mucopeptide N-acetylmuramoylhydrolase, Muramidase

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About This Item

CAS Number:
12650-88-3
Enzyme Commission number:
3.2.1.17 (BRENDA, IUBMB)
EC Number:
235-747-3
MDL number:
MFCD00131557
UNSPSC Code:
12352204
NACRES:
NA.54

sterility

aseptically filled

Quality Level

300

form

powder

enzyme activity

≥40000 units/mg protein

mol wt

single-chain 14.3 kDa

UniProt accession no.

P00698

storage temp.

−20°C

Gene Information

chicken ... LYZ(396218)

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Application

Enzyme breaks down the cell walls of bacteria; used to prepare spheroplasts.

Biochem/physiol Actions

Lysozyme hydrolyzes β(1→4) linkages between N-acetylmuramic acid and N-acetyl-D-glucosamine residues in peptidoglycan and between N-acetyl-D-glucosamine residues in chitodextrin. Gram-positive cells are quite susceptible to this hydrolysis as their cell walls have a high proportion of peptidoglycan. Gram-negative bacteria are less susceptible due to the presence of an outer membrane and a lower proportion of peptidoglycan. However, these cells may be hydrolyzed in the presence of EDTA that chelates metal ions in the outer bacterial membrane.

The enzyme is active over a broad pH range (6.0 to 9.0). At pH 6.2, maximal activity is observed over a wider range of ionic strengths (0.02 to 0.100 M) than at pH 9.2 (0.01 to 0.06 M).

Unit Definition

One unit will lyse 0.6 μg of Micrococcus lysodeikticus per minute by turbidimetric detection at 600 nm when suspended in buffer at pH 6.2 at 25 °C.

Preparation Note

Prepared from L6876

Other Notes

View more information on enzymes for complex carbohydrate analysis at www.sigma-aldrich.com/enzymeexplorer

Pictograms

Health hazard
GHS08

Signal Word

Danger

Hazard Statements

H334

Precautionary Statements

P261 - P284 - P501

Hazard Classifications

Resp. Sens. 1

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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Certificates of Analysis (COA)

Lot/Batch Number
0000315433
0000326833
SLCQ3794
SLCQ9219
SLCM0048

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Mariela G Del Giudice et al.
Infection and immunity, 81(3), 956-964 (2013-01-16)
Secretion of proteins in Gram-negative bacteria is a high-energy-consuming process that requires translocation across two membranes and a periplasmic space composed of a mesh-like layer, the peptidoglycan. To achieve this, bacteria have evolved complex secretion systems that cross these barriers
Anne Derbise et al.
The Journal of infectious diseases, 207(10), 1535-1543 (2013-02-14)
Yersinia pestis (the plague bacillus) and its ancestor, Yersinia pseudotuberculosis (which causes self-limited bowel disease), encode putative homologues of the periplasmic lysozyme inhibitor Ivy and the membrane-bound lysozyme inhibitor MliC. The involvement of both inhibitors in virulence remains subject to
Mahdieh Mansouri et al.
Molecules (Basel, Switzerland), 18(1), 789-813 (2013-01-25)
The interactions between cyclophosphamide (CYC) and lysozyme (LYZ) in the presence of different cyclodextrins (CDs) were investigated by UV absorption, fluorescence spectroscopy, circular dichroism (CD), and molecular modeling techniques under imitated physiological conditions. The UV absorption results showed the formation
P F Zabrodskiĭ et al.
Eksperimental'naia i klinicheskaia farmakologiia, 75(11), 19-21 (2013-01-18)
It is established in experiments on noninbred rats that the use of imunofan (20 mg/kg daily) and polyoxidonium (150 mg/kg daily) for 7 days on the background of chronic intoxication with organophosphorus agent VX (0.01 LD50, single daily treatment for
Tao G Dong et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(7), 2623-2628 (2013-01-31)
Type VI protein secretion system (T6SS) is important for bacterial competition through contact-dependent killing of competitors. T6SS delivers effectors to neighboring cells and corresponding antagonistic proteins confer immunity against effectors that are delivered by sister cells. Although T6SS has been
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Protocols

Enzymatic Assay of Lysozyme (EC 3.2.1.17)

This enzymatic rate determination may be used for Lysozyme products. It is not to be used to assay recombinant or insoluble Lysozyme on agarose.

Enzymatic Assay of Lysozyme (EC 3.2.1.17)

This enzymatic rate determination may be used for Lysozyme products. It is not to be used to assay recombinant or insoluble Lysozyme on agarose.

Enzymatic Assay of Lysozyme (EC 3.2.1.17)

This enzymatic rate determination may be used for Lysozyme products. It is not to be used to assay recombinant or insoluble Lysozyme on agarose.

Enzymatic Assay of Lysozyme (EC 3.2.1.17)

This enzymatic rate determination may be used for Lysozyme products. It is not to be used to assay recombinant or insoluble Lysozyme on agarose.

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