High Stability Staphylococcus Aureus V8 Protease Without Miscellaneous Enzyme

High Stability Staphylococcus Aureus V8 Protease Without Miscellaneous Enzyme

Sequencing Grade V8 Protease

DESCRIPTION

Recombinant V8 protease is the serine protease family and can specifically hydrolyzing glutamic acid or aspartic acid residues carboxy side peptide bonds. The Glu carboxy terminal peptide bond can be identified and cleaved in CH₄COONH₄ buffer (pH 7.8) and NH₄HCO₃ (pH 4.0 ).Identify and cleave the Glu or Asp carboxy terminal peptide bond in phosphate buffer (pH 7.8),and the hydrolysis rate of Glu was higher than that of Glu Asp. It can be used alone or in combination with other proteases when used in protein digestion, peptide profiling and peptide mass fingerprinting analysis. Recombinant V8 protease has activity between pH 4.0-10.0, and the optimum pH is 8.0-8.5. The inhibitors of V8 protease are diisopropylfluorophosphate (DFP), α2-macroglobulin and Nα-P-tosyl-L-lysine chloromethyl ketone (TLCK).

1. Product Information

Cat. NO.: V813

CAS: 66676-43-5

EC: 3.4.21.19

Full Name: Sequencing Grade Recombinant V8 Protease

Synonyms: V8 protease; Endoproteinase Asp-C; Endoproteinase Glu-C

Storage temperature: 2-8°C

Source: Recombinant V8 protease is a genetically engineered protein expressed in E.coli

2. MAIN FEATURES

UNIT DEFINITION: One unit is defined as the amount of enzyme required to catalytic substrate Z-Phe-Leu-Glu-4-nitranilide produced 1 μmol of 4-nitroaniline in one minute at 25°C and pH 7.8 .

3. STABILITY OF STORAGE AND TRANSPORT

Storage stability: Recombinant V8 protease should be stored under 2-8°C in sealed container.It is stable within 6 months after dissolved with1mM HCl and 50mM HAC at -20°C or below. It is stable within 2 months after dissolved with 1mM HCl and 50mM HAC at 4°C.85% activity above can be kept after dissolved with 1mM HCl and 50mM HAC at 25°C or 37°C 12h. There is no enzyme activity loss after 10 times repeated freezing and thawing.

Transportation stability: The product is stable by blue ice insulation transport.

4. RECOMMEND USAGE

Note that before using

1) Divide the material in according to amount used to avoid contamination or self-cutting.

2) Dissolve target protein.

The target protein is dissolved by  buffer, for example 25-50 mM NH₄HCO₃ pH 7.8, if the solubility of target protein is not good, the target protein will be denatured by adding urea, SDS, DTT or heating. The effects of urea and SDS on V8 protease are shown in the Table 1.

3) Digestion

The recommended ratio of V8 protease and target protein is 1:20-1:100 (W/W), digesting the protein for 2-18h at 25-37 °C.

Table 1: Stability of V8 protease in the different concentrations of denaturant, urea 25 °C 2h, SDS 25 °C 12h

Table 1

4) Application example: recombinant V8 protease digests insulin

100 μl of insulin solution +198μl 0.4 M Tris-HCl pH 8.0 + 60μl 0.1% V8 Protein solution + ultrapure water to 400μl. 37 °C water bath reaction 2 h, plus 6μl phosphoric acid solution to terminate the reaction, C18 column analysis:

  A:Before digesting                                                    B:After digesting

5.PRODUCT ADVANTAGE

Animal origin free: Recombinant V8 Protease has no exogenous virus contamination,and any animal origin material is not used in the production process.

Stable quality: Mass production can ensure stable and continuous quality of products.It is no difference between the batch and the product quality is stable.

High purity: Higher specific activity.Host protein residues is less than the limits of biological products.

Lyophilized powder: The product is lyophilized powder and is easy to store and transport.

Compliance with regulatory requirements: Producing equipment and environment comply with relevant regulatory requirements, and the production process is in full compliance with NSF ISO 9001: 2015 quality system and GMP guidelines.

Complete quality documents: we can provide relevant regular support files in according to customers’ requirement.