CTSD Mouse

Cathepsin-D Mouse Recombinant
Cat. No.
BT30483
Source
Sf9, Baculovirus cells.
Synonyms
Ctsd, CatD, CD, Cathepsin D.
Appearance
Sterile Filtered colorless solution.
Purity
Greater than 90.0% as determined by SDS-PAGE.
Usage
THE BioTek's products are furnished for LABORATORY RESEARCH USE ONLY. The product may not be used as drugs, agricultural or pesticidal products, food additives or household chemicals.
Shipped with Ice Packs
In Stock

Description

CTSD produced in Sf9 Baculovirus cells is a single, glycosylated polypeptide chain containing 398 amino acids (21-410 a.a.) and having a molecular mass of 44.0kDa (Molecular size on SDS-PAGE will appear at approximately 40-57kDa). CTSD is expressed with an 8 amino acid His tag at C-Terminus and purified by proprietary chromatographic techniques.

Product Specs

Introduction
Cathepsin D, an estrogen-regulated lysosomal protease, plays a crucial role in cancer cell migration and invasion. It achieves this by breaking down the basement membrane, extracellular matrix, and connective tissue. Its involvement in these processes, along with its mitogenic activities, has led to its recognition as a potential prognostic marker for various cancer types. Cathepsin D is found in both epithelial cells and macrophages. The protein is initially synthesized as a 54kDa precursor, which undergoes proteolytic processing to form a 48kDa intermediate single chain. This intermediate then matures into a more stable two-chain form consisting of 34kDa and 14kDa units.
Description
CTSD, produced in Sf9 Baculovirus cells, is a single, glycosylated polypeptide chain with a molecular mass of 44.0kDa. The protein consists of 398 amino acids (specifically, amino acids 21 to 410) and appears on SDS-PAGE at a size of approximately 40-57kDa. This CTSD variant includes an 8 amino acid His tag at its C-terminus and is purified using proprietary chromatographic techniques.
Physical Appearance
Clear, colorless solution that has been sterilized by filtration.
Formulation
The CTSD protein solution is provided at a concentration of 0.25mg/ml. It is formulated in a solution of Phosphate Buffered Saline (pH 7.4) and 10% glycerol.
Stability
For short-term storage (up to 2-4 weeks), the CTSD protein solution should be stored at 4°C. For extended storage, it is recommended to freeze the solution at -20°C. To further ensure stability during long-term storage, consider adding a carrier protein such as HSA or BSA (0.1% concentration). It is crucial to minimize the number of freeze-thaw cycles to maintain protein integrity.
Purity
The purity of CTSD is greater than 90%, as determined by SDS-PAGE analysis.
Biological Activity
CTSD exhibits a specific activity greater than 1,000 pmol/min/µg. This indicates that one unit of the enzyme can convert 1.0 picomole of the substrate Mca-PLGL-Dpa-AR-NH2 to the product MCA-Pro-Leu-OH within one minute. This activity is measured at a pH of 3.5 and a temperature of 25°C.
Synonyms
Ctsd, CatD, CD, Cathepsin D.
Source
Sf9, Baculovirus cells.
Amino Acid Sequence
IIRIPLRKFT SIRRTMTEVG GSVEDLILKG PITKYSMQSS PKTTEPVSEL LKNYLDAQYY GDIGIGTPPQ CFTVVFDTGS SNLWVPSIHC KILDIACWVH HKYNSDKSST YVKNGTSFDI HYGSGSLSGY LSQDTVSVPC KSDQSKARGI KVEKQIFGEA TKQPGIVFVA AKFDGILGMG YPHISVNNVL PVFDNLMQQK LVDKNIFSFY LNRDPEGQPG GELMLGGTDS KYYHGELSYL NVTRKAYWQV HMDQLEVGNE LTLCKGGCEA IVDTGTSLLV GPVEEVKELQ KAIGAVPLIQ GEYMIPCEKV SSLPTVYLKL GGKNYELHPD KYILKVSQGG KTICLSGFMG MDIPPPSGPL WILGDVFIGS YYTVFDRDNN RVGFANAVVL LEHHHHHH.

Product Science Overview

Structure and Synthesis

Mouse Cathepsin-D is synthesized as a precursor protein, consisting of:

  • Signal peptide (residues 1-20)
  • Propeptide (residues 21-64)
  • Mature chain (residues 65-410)

The mature form of Cathepsin-D is responsible for its proteolytic activity. The recombinant version of mouse Cathepsin-D is often produced in cell lines, such as mouse myeloma cells, and is tagged for purification and detection purposes .

Function

Cathepsin-D is involved in the normal degradation of proteins and the activation of precursors of bioactive proteins in pre-lysosomal compartments . It is particularly important in the breakdown of amyloid-β protein (Aβ) and the microtubule-associated protein tau, both of which are implicated in Alzheimer’s disease .

Role in Disease

Research has shown that Cathepsin-D plays a significant role in the pathogenesis of Alzheimer’s disease. Genetic deletion of Cathepsin-D in mice leads to the accumulation of amyloid-β and tau proteins, which are hallmark features of Alzheimer’s disease . This suggests that Cathepsin-D is crucial for maintaining the proteostasis of these proteins in vivo.

Applications

Recombinant mouse Cathepsin-D is used in various research applications, including:

  • Studying protein degradation pathways
  • Investigating the role of Cathepsin-D in diseases like Alzheimer’s
  • Developing potential therapeutic interventions

The recombinant protein is typically purified to high levels of purity and is available in carrier-free formulations to avoid interference in experimental assays .

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