Cystatin C/CST3 Protein, Human (HEK293, His)

Cystatin C/CST3 protein can significantly inhibit cysteine proteases and locally regulate their enzymatic activity. It captures and binds free plasma hemoglobin, preventing kidney damage and supporting hepatic heme iron recycling. Cystatin C/CST3 Protein, Human (HEK293, His) is the recombinant human-derived Cystatin C/CST3 protein, expressed by HEK293 , with C-6*His labeled tag.

For research use only. We do not sell to patients.
  • Species: Human
  • Source: HEK293
  • Storage:
    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.
  • Biological Activity
  • Technical Parameters
  • Product Properties
  • Documentation
  • Help & FAQs

Biological Activity

Description

Cystatin C/CST3 protein can significantly inhibit cysteine proteases and locally regulate their enzymatic activity. It captures and binds free plasma hemoglobin, preventing kidney damage and supporting hepatic heme iron recycling. Cystatin C/CST3 Protein, Human (HEK293, His) is the recombinant human-derived Cystatin C/CST3 protein, expressed by HEK293 , with C-6*His labeled tag.

Background

The Cystatin C/CST3 protein serves a crucial physiological role as an inhibitor of cysteine proteinases, acting as a local regulator of their enzyme activity. It is known to capture and bind free plasma hemoglobin, preventing kidney damage and enabling the hepatic recycling of heme iron. In cases of hemolysis, where hemoglobin can accumulate in the kidneys and be secreted in urine, Cystatin C/CST3 plays a vital role in clearing the complexes formed between hemoglobin and Haptoglobin. Additionally, Cystatin C/CST3 acts as an antioxidant, exhibits antibacterial activity, and contributes to modulating various aspects of the acute phase response. The protein's homodimeric structure further enhances its functionality and effectiveness as an enzyme inhibitor.

MCE Validation Data

  • Purity - SDS-PAGE

    Purity - SDS-PAGE

    ≥ 95%, as determined by reducing SDS-PAGE.

Technical Parameters

  • Species Human
  • Source HEK293
  • Tag C-His
  • Accession
  • Gene ID
  • Molecular Construction
    • N-term
    • CST3 (S27-A146)
      Accession # P01034
    • 6*His
    • C-term
  • Protein Length

    Full Length of Mature Protein

  • Synonyms

    CST3; Cystatin C (Amyloid Angiopathy And Cerebral Hemorrhage); Cystatin C; BA218C14.4 (Cystatin C); Epididymis Secretory Protein Li 2; Cystatin 3; Neuroendocrine Basic Polypeptide; Cystatin-3; Post-Gamma-Globulin; HEL-S-2; Gamma-Trace; ADLDWA; Cystatin-C;

  • AA Sequence

    SSPGKPPRLVGGPMDASVEEEGVRRALDFAVGEYNKASNDMYHSRALQVVRARKQIVAGVNYFLDVELGRTTCTKTQPNLDNCPFHDQPHLKRKAFCSFQIYAVPWQGTMTLSKSTCQDA

  • Molecular Weight

    Approximately 15-18 kDa, based on SDS-PAGE under reducing conditions.

  • Purity

    ≥ 95%, as determined by reducing SDS-PAGE.

Product Properties

Appearance

Lyophilized powder

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.

Calculators

Reconstitution Calculator

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

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

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

Concentration (start) Concentration (start)
×
Volume (start) Volume (start)
=
Concentration (final) Concentration (final)
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The Specific Activity Calculator Equation
  • Specific Activity (Unit/mg)
  • Biological Activity (ED50)

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

Specific Activity (Unit/mg) Specific Activity (Unit/mg)
Unit/mg
= 106 ÷
Biological Activity (ED50) Biological Activity (ED50)
106 ÷
ng/mL
MOQ
Minimum order quantity
100 mg

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