Leptin tA Ovine, PEG

Leptin Antagonist Triple Mutant Ovine Recombinant, Pegylated
Cat. No.
BT22570
Source
Escherichia coli.
Synonyms
Appearance
White lyophilized (freeze-dried) powder.
Purity
Greater than 95.0% as determined by:
(a) Gel filtration analysis.
(b) Analysis 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

Pegylated Leptin Antagonist Triple Mutant Ovine Recombinant is a single non-glycosilated polypeptide chain containing 146 aa and an additional Ala at N-terminus and having a molecular mass of ~ 35.6 kDa, Leptin was mutated, resulting in L39A/D40A/F41A mutant. However due to enlarged hydrodymanic volume it runs on the SGS-Page as 48 kDa protein and in gel-filtration on Superdex 200 as over 200kDa protein. Leptin Antagonist Triple Mutant Ovine Recombinant Mono-Pegylated with 20kDa PEG and was purified by proprietary chromatographic techniques.

Product Specs

Description
Pegylated Leptin Antagonist Triple Mutant Ovine Recombinant is a single, non-glycosylated polypeptide chain containing 146 amino acids and an additional Alanine at the N-terminus. It has a molecular mass of approximately 35.6 kDa. The Leptin was mutated, resulting in the L39A/D40A/F41A mutant. Due to its enlarged hydrodynamic volume, it runs on SDS-PAGE as a 48 kDa protein and in gel-filtration on Superdex 200 as an over 200 kDa protein. The Leptin Antagonist Triple Mutant Ovine Recombinant is mono-pegylated with 20 kDa PEG and was purified by proprietary chromatographic techniques.
Physical Appearance
White, lyophilized (freeze-dried) powder.
Formulation
The protein was lyophilized from a concentrated (0.65 mg/ml) solution with 0.003 mM NaHCO3.
Solubility
It is recommended to reconstitute the lyophilized Leptin-Antagonist Triple Mutant Ovine Recombinant in sterile water or sterile 0.4% NaHCO3 adjusted to pH 8, to a concentration of not less than 100 µg/ml. This solution can then be further diluted to other aqueous solutions.
Stability
Lyophilized Leptin Antagonist Triple Mutant Ovine Recombinant, although stable at room temperature for several weeks, should be stored desiccated below -18°C. Upon reconstitution at > 0.1 mg/ml and up to 2 mM, and after filter sterilization, the Leptin mutant can be stored at 4°C or even room temperature for several weeks, making it suitable for long-term infusion studies using osmotic pumps. At lower concentrations, the addition of a carrier protein (0.1% HSA or BSA) is suggested. Please prevent freeze-thaw cycles.
Purity
Greater than 95.0% as determined by: (a) Gel filtration analysis. (b) Analysis by SDS-PAGE.
Biological Activity
Pegylated triple antagonist can inhibit leptin-induced proliferation of BAF/3 cells stably transfected with the long form of the human leptin receptor. Its in vitro activity is 6-8 fold lower than the non-pegylated antagonist, but in vivo it has a profound weight gain effect (as compared to the non-pegylated antagonist, similar to mouse leptin antagonists), resulting mainly from increased food intake.
Protein Content
Protein quantitation was carried out by UV spectroscopy at 280 nm using an absorbency value of 0.2 as the extinction coefficient for a 0.1% (1 mg/ml) solution at pH 8.0. This value is calculated by the PC GENE computer analysis program for protein sequences (IntelliGenetics).
Source
Escherichia coli.

Product Science Overview

Introduction

Leptin is a hormone predominantly made by adipose cells and enterocytes in the small intestine that helps to regulate energy balance by inhibiting hunger. It is often referred to as the “satiety hormone” or “fat hormone.” Leptin’s primary target is the hypothalamus in the brain where it inhibits appetite by counteracting the effects of neuropeptide Y, a potent feeding stimulant secreted by cells in the gut and in the hypothalamus.

Leptin Antagonists

Leptin antagonists are molecules designed to inhibit the action of leptin. These antagonists are particularly useful in research settings to study the physiological and pathological roles of leptin. They can help in understanding leptin resistance, a condition often associated with obesity where the body does not respond to leptin signals, leading to uncontrolled food intake and weight gain.

Triple Mutant Ovine Recombinant Leptin

The Leptin Antagonist Triple Mutant Ovine Recombinant is a specially engineered form of leptin. It is derived from ovine (sheep) leptin and has been mutated at three specific sites: L39A, D40A, and F41A. These mutations are designed to disrupt the binding of leptin to its receptor, effectively turning it into an antagonist. This form of leptin is produced recombinantly, meaning it is generated through genetic engineering techniques in a laboratory setting.

Pegylation

Pegylation refers to the process of attaching polyethylene glycol (PEG) chains to another molecule, in this case, the leptin antagonist. Pegylation is a common technique used to improve the pharmacokinetics of therapeutic proteins. It can increase the molecule’s stability, solubility, and half-life in the bloodstream, making it more effective for research and potential therapeutic applications.

Characteristics

The Pegylated Leptin Antagonist Triple Mutant Ovine Recombinant is a single non-glycosylated polypeptide chain containing 146 amino acids, with an additional alanine at the N-terminus. It has a molecular mass of approximately 35.6 kDa . The pegylation process enhances its stability and prolongs its activity in biological systems.

Applications

This leptin antagonist is primarily used in research to study the role of leptin in various physiological processes, including appetite regulation, energy balance, and metabolic disorders. It can also be used to investigate leptin resistance and its implications in obesity and related conditions.

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