1. Recombinant Proteins
  2. Enzymes & Regulators
  3. Hydrolases (EC 3) Cathepsin
  4. Cathepsin D
  5. Cathepsin D Protein, Human (HEK293, C-His)

Cathepsin D protein is an acidic protease that actively participates in intracellular protein breakdown. Studies have shown that it is critical in the processing of amyloid precursor protein (APP), with ADAM30-mediated cleavage and activation leading to APP degradation. Cathepsin D Protein, Human (HEK293, C-His) is the recombinant human-derived Cathepsin D protein, expressed by HEK293 , with C-6*His labeled tag. The total length of Cathepsin D Protein, Human (HEK293, C-His) is 392 a.a., with molecular weight of ~44.78 kDa.

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  • Biological Activity

  • Technical Parameters

  • Properties

  • Documentation

Description

Cathepsin D protein is an acidic protease that actively participates in intracellular protein breakdown. Studies have shown that it is critical in the processing of amyloid precursor protein (APP), with ADAM30-mediated cleavage and activation leading to APP degradation. Cathepsin D Protein, Human (HEK293, C-His) is the recombinant human-derived Cathepsin D protein, expressed by HEK293 , with C-6*His labeled tag. The total length of Cathepsin D Protein, Human (HEK293, C-His) is 392 a.a., with molecular weight of ~44.78 kDa.

Background

Cathepsin D, an acid protease, exerts its activity in the intracellular breakdown of proteins. This protease is implicated in the processing of amyloid precursor protein (APP), with its cleavage and activation by ADAM30 leading to the degradation of APP, as evidenced in studies. Cathepsin D's involvement extends to the pathogenesis of various diseases, including breast cancer, and it is suggested to play a role in Alzheimer's disease, highlighting its significance in cellular processes and potential connections to pathological conditions.

Biological Activity

Measured by its ability to cleave a peptide substrate, Mca-PLGL-Dpa-AR-NH2. The specific activity is 4624.96 pmol/min/µg, as measured under the described conditions.

Species

Human

Source

HEK293

Tag

C-6*His

Accession

P07339 (L21-L412)

Gene ID
Molecular Construction
N-term
Cathepsin D (L21-L412)
Accession # P07339
6*His
C-term
Synonyms
rHuCathepsin D, His; Cathepsin D; CTSD; CPSD
AA Sequence

LVRIPLHKFTSIRRTMSEVGGSVEDLIAKGPVSKYSQAVPAVTEGPIPEVLKNYMDAQYYGEIGIGTPPQCFTVVFDTGSSNLWVPSIHCKLLDIACWIHHKYNSDKSSTYVKNGTSFDIHYGSGSLSGYLSQDTVSVPCQSASSASALGGVKVERQVFGEATKQPGITFIAAKFDGILGMAYPRISVNNVLPVFDNLMQQKLVDQNIFSFYLSRDPDAQPGGELMLGGTDSKYYKGSLSYLNVTRKAYWQVHLDQVEVASGLTLCKEGCEAIVDTGTSLMVGPVDEVRELQKAIGAVPLIQGEYMIPCEKVSTLPAITLKLGGKGYKLSPEDYTLKVSQAGKTLCLSGFMGMDIPPPSGPLWILGDVFIGRYYTVFDRDNNRVGFAEAARLHHHHHH

Molecular Weight

Approximately 44.78 kDa

Purity
  • Greater than 95% as determined by reducing SDS-PAGE.
Appearance

Lyophilized powder.

Formulation

Lyophilized from a 0.2 μm filtered solution of 20 mM MES, 150 mM NaCl, pH 5.5.

Endotoxin Level

<1 EU/μg, determined by LAL method.

Reconstitution

It is not recommended to reconstitute to a concentration less than 100 μg/mL in ddH2O. For long term storage it is recommended to add a carrier protein (0.1% BSA, 5% HSA, 10% FBS or 5% Trehalose).

Storage & Stability

Stored at -20°C for 2 years from date of receipt. After reconstitution, it is stable at 4°C for 1 week or -20°C for longer (with carrier protein). It is recommended to freeze aliquots at -20°C or -80°C for extended storage.

Shipping

Room temperature in continental US; may vary elsewhere.

Documentation

Cathepsin D Protein, Human (HEK293, C-His) Related Classifications

Help & FAQs
  • How should lyophilized recombinant proteins be reconstituted and stored?

    1. Before opening the cap, centrifuge the vial at 13000 rpm for 20-30 seconds. This step will ensure that any lyophilized powder that may have adhered to the cap or walls is collected at the bottom of the vial, minimizing the risk of product loss. 2. Taking 10 μg as an example, first add 20 μL of reconstituted solution provided by MCE and use a pipette to gently resuspend the lyophilized protein until it is fully dissolved.. (For most proteins, the reconstitution solution we provide is sterile water. If a diluent other than water is required, it will be indicated in the product's Certificate of Analysis (COA).). 3. Add an additional 80 μL of buffer/culture medium containing carrier protein (either 0.1% BSA, 5% HSA, 10% FBS, or 5% trehalose), and then use a pipette to gently mix until uniform. The final concentration is should not be lower than 100 μg/mL. 4. Aliquot at least 20 μL per tube. 5. After aliquoting, store it frozen at a temperature ranging from -20ºC to -80ºC, and it can be preserved for 3 to 6 months.

  • How should solution-form recombinant proteins be stored?

    1. The product can be stored in its original form and diluted as needed upon use. 2. Alternatively, dilute with a buffer/culture medium containing a carrier protein (either 0.1% BSA, 5% HSA, 10% FBS, or 5% alginate), mix well by pipetting, and ensure that

  • Why is it necessary to add carrier proteins?

    Carrier proteins are commonly added to enhance the stability of recombinant proteins, preventing them from adhering to the walls of the container during freezing or thawing processes. Plastic tubes have a certain adsorptive capacity for proteins, which may lead to difficulty in separating the protein from the tube walls, resulting in a decrease in the actual concentration of the protein in the solution and thus affecting its activity. To minimize such losses, it is recommended to add a commonly used carrier protein solution prior to the long-term storage of recombinant protein products.

  • Carrier protein types and options?

    In cases where the carrier protein is not expected to influence the experimental outcomes, an appropriate carrier protein, such as 0.1% BSA (Bovine Serum Albumin), 5% HSA (Human Serum Albumin), 10% FBS (Fetal Bovine Serum), or 5% trehalose, can be incorpo

  • Reconstitution Calculator

  • Dilution Calculator

  • Specific Activity Calculator

The reconstitution calculator equation

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration

Volume (to add to vial) = Mass (in vial) ÷ Desired Reconstitution Concentration
= ÷

The dilution calculator equation

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)
× = ×
C1   V1   C2   V2

The specific activity calculator equation

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)

Specific Activity (Unit/mg) = 106 ÷ Biological Activity (ED50)
Unit/mg = 106 ÷ ng/mL

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Inquiry Information

Product Name:
Cathepsin D Protein, Human (HEK293, C-His)
Cat. No.:
HY-P7748A
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