Leptin tA Ovine

Leptin Antagonist Triple Mutant Ovine Recombinant
Cat. No.
BT20045
Source
Escherichia coli.
Synonyms
Appearance
White lyophilized (freeze-dried) powder.
Purity
Greater than 98.0% 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

Leptin Antagonist Triple Mutant Ovine Recombinant is a single non-glycosilated polypeptide chain containing 146 amino and additional Ala at N-terminus acids and having a molecular mass of ~ 16 kDa, Leptin was mutated, resulting in L39A/D40A/F41A mutant. Leptin Antagonist Triple Mutant Ovine Recombinant was purified by proprietary chromatographic techniques.

Product Specs

Description
Leptin Antagonist Triple Mutant Ovine Recombinant is a single, non-glycosylated polypeptide chain with 146 amino acids, including an additional alanine at the N-terminus. It has a molecular mass of approximately 16 kDa. The Leptin protein was mutated, resulting in the L39A/D40A/F41A mutant. This recombinant protein was purified using proprietary chromatographic techniques.
Physical Appearance
White, lyophilized powder.
Formulation
The protein was lyophilized from a concentrated solution (0.65 mg/ml) containing 0.003 mM sodium bicarbonate.
Solubility
Reconstitute the lyophilized Leptin Antagonist Triple Mutant Ovine Recombinant in sterile water or sterile 0.4% sodium bicarbonate adjusted to a pH of 8. The minimum concentration should be 100 µg/ml. This solution can be further diluted with other aqueous solutions.
Stability
Lyophilized Leptin Antagonist Triple Mutant Ovine Recombinant remains stable at room temperature for several weeks. However, it is recommended to store it desiccated below -18°C for long-term storage. After reconstitution to a concentration greater than 0.1 mg/ml and up to 2 mM, followed by filter sterilization, it can be stored at 4°C or room temperature for several weeks. This stability makes it suitable for extended infusion studies using osmotic pumps. For lower concentrations, adding a carrier protein like 0.1% HSA or BSA is suggested. Avoid repeated freeze-thaw cycles.
Purity
Purity exceeds 98.0% as determined by: (a) Gel filtration analysis. (b) SDS-PAGE analysis.
Biological Activity
THE BioTek's Leptin Antagonist Triple Mutant Ovine Recombinant effectively inhibits leptin-induced proliferation of BAF/3 cells stably transfected with the long form of the mouse leptin receptor. It also inhibits various leptin effects in several in vitro bioassays.
Protein Content
Protein quantification was performed using UV spectroscopy at 280 nm. An absorbency value of 0.21 was used 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.
Amino Acid Sequence
The sequence of the first five N-terminal amino acids was determined and was found to be Ala-Val-Pro-Ile-Arg.

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. Leptin acts on cell receptors in the arcuate nucleus of the hypothalamus. In recent years, researchers have developed various leptin antagonists to study and potentially treat conditions related to leptin signaling, such as obesity and metabolic disorders.

Leptin Antagonist Triple Mutant

The Leptin Antagonist Triple Mutant Ovine Recombinant, often referred to as Leptin tA Ovine, is a specially engineered protein designed to inhibit the action of leptin. This antagonist is a single non-glycosylated polypeptide chain containing 146 amino acids, with an additional alanine at the N-terminus. The molecular mass of this protein is approximately 16 kDa .

Mutations and Production

The Leptin Antagonist Triple Mutant is characterized by three specific mutations: L39A, D40A, and F41A. These mutations are introduced to disrupt the normal binding of leptin to its receptor, thereby inhibiting its biological activity. The protein is produced using recombinant DNA technology in Escherichia coli (E. coli) and is purified through proprietary chromatographic techniques .

Physical and Chemical Properties

The Leptin Antagonist Triple Mutant Ovine Recombinant is typically supplied as a white lyophilized (freeze-dried) powder. It is recommended to reconstitute the lyophilized protein in sterile water or sterile 0.4% NaHCO3 adjusted to pH 8, at a concentration of not less than 100 µg/ml. The protein is stable at room temperature for several weeks when lyophilized, but should be stored desiccated below -18°C for long-term storage .

Biological Activity

This leptin antagonist is capable of inhibiting leptin-induced proliferation of BAF/3 cells that are stably transfected with the long form of the mouse leptin receptor. It also inhibits various leptin effects in several in vitro bioassays. This makes it a valuable tool for studying leptin signaling pathways and for potential therapeutic applications in conditions where leptin activity needs to be modulated .

Applications and Research

Leptin antagonists, including the Leptin Antagonist Triple Mutant Ovine Recombinant, are used extensively in research to understand the role of leptin in energy homeostasis, obesity, and metabolic disorders. They are also being explored for their potential therapeutic applications in treating conditions such as obesity, diabetes, and other metabolic diseases .

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