Active Cathepsin D (CTSD) Homo sapiens (Human) Active protein

CPSD; CLN10; Lysosomal Aspartyl Protease; Ceroid-Lipofuscinosis,Neuronal 10

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Overview
Properties
  • Buffer FormulationPBS, pH7.4, containing 0.01% SKL, 1mM DTT, 5% Trehalose and Proclin300.
  • Traits Freeze-dried powder, Purity > 97%
  • Isoelectric Point6.1
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  • Active Cathepsin D (CTSD) Packages (Simulation)
  • Active Cathepsin D (CTSD) Packages (Simulation)
  • Active Cathepsin D (CTSD) Figure. Gene Sequencing (Extract)
  • APB280Hu61.png Figure. SDS-PAGE
  • Certificate ISO9001: 2008, ISO13485: 2003 Registered

Activity test

Figure. The binding activity of CTSD with HSP90b1.
Cathepsin D (CSTD) is an aspartic protease that depends critically on protonation of its active site Asp residue. Along with Asp-protonation, lower pH also leads to conformational switch in cathepsin-D: the N-terminal segment of the protease moves out of the active site as pH drops. Similar to other aspartic protainases, cathepsin D accommodates up to 8 amino acid residues in the binding cleft of the active site. The main physiological functions of cathepsin D consist of metabolic degradation of intracellular proteins, activation and degradation of polypeptide hormones and growth factors, activation of enzymatic precursors, processing of enzyme activators and inhibitors, brain antigen processing and regulation of programmed cell death. Besides, Heat Shock Protein 90kDa Beta 1 (HSP90b1) has been identified as an interactor of CSTD, thus a binding ELISA assay was conducted to detect the interaction of recombinant human CSTD and recombinant human HSP90b1. Briefly, CSTD were diluted serially in PBS, with 0.01% BSA (pH 7.4). Duplicate samples of 100μL were then transferred to HSP90b1-coated microtiter wells and incubated for 2h at 37℃. Wells were washed with PBST and incubated for 1h with anti-CSTD pAb, then aspirated and washed 3 times. After incubation with HRP labelled secondary antibody, wells were aspirated and washed 3 times. With the addition of substrate solution, wells were incubated 15-25 minutes at 37℃. Finally, add 50µL stop solution to the wells and read at 450nm immediately. The binding activity of CSTD and HSP90b1 was shown in Figure 1, and this effect was in a dose dependent manner.

Usage

Reconstitute in 20mM Tris, 150mM NaCl (PH8.0) to a concentration of 0.1-1.0 mg/mL. Do not vortex.

Storage

Avoid repeated freeze/thaw cycles. Store at 2-8°C for one month. Aliquot and store at -80°C for 12 months.

Stability

The thermal stability is described by the loss rate. The loss rate was determined by accelerated thermal degradation test, that is, incubate the protein at 37°C for 48h, and no obvious degradation and precipitation were observed. The loss rate is less than 5% within the expiration date under appropriate storage condition.

Citations

  • Cathepsin D is released after severe tissue trauma in vivo and is capable of generating C5a in vitroScienceDirect: S0161589011008297
  • Plasma Cathepsin D Levels: A Novel Tool to Predict Pediatric Hepatic InflammationPubMed: 25732418
  • Plasma cathepsin D correlates with histological classifications of fatty liver disease in adults and responds to interventionpubmed:27922112
  • Berberine ameliorates intrahippocampal kainate-induced status epilepticus and consequent epileptogenic process in the rat: Underlying mechanismspubmed:28061403
  • Limited applicability of cathepsin D for the diagnosis and monitoring of non‐alcoholic steatohepatitis
  • Plasma cathepsin D activity is negatively associated with hepatic insulin sensitivity in overweight and obese humansPubmed: 31690989
  • Iron and Advanced Glycation End Products: Emerging Role of Iron in Androgen Deficiency in ObesityPubmed: 32235809
  • LVV-hemorphin-7 (LVV-H7) plays a role in antinociception in a rat model of alcohol-induced pain disorders33253777
  • Identification of Cathepsin D as a Plasma Biomarker for Alzheimer's Disease33445607
  • Analysis of silymarin-modulating effects against acrylamide-induced cerebellar damage in male rats: Biochemical and pathological markers33965515
  • PGRS Domain of Rv0297 of Mycobacterium tuberculosis Is Involved in Modulation of Macrophage Functions to Favor Bacterial Persistence33042856
  • Serum CathepsinD in pregnancy: relation with metabolic and inflammatory markers and effects of fish oils and probioticsPubmed:35304048
  • A Comparison of Various Chips Used for the Manufacture of Biosensors Applied in Non-Fluidic Array SPRi, Based on the Example of Determination of Cathepsin DPubmed:35049649

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