HIV-1 Protease

HIV-1 Protease Recombinant
Cat. No.
BT22951
Source
Escherichia Coli.
Synonyms
Appearance
Sterile filtered colorless clear solution.
Purity
Greater than 95.0% 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.

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Description

HIV-1 protease is an active homodimer having a molecular mass of 21.6kDa (each monomer of 99 amino acids is 10.8kDa).

Product Specs

Introduction
The HIV-1 protease plays a crucial role in the HIV virus's life cycle. It is produced within infected cells as a component of the Gag-Pol polyprotein. Following the assembly of immature viral particles, HIV-1 protease is self-released through autocatalytic cleavage. Subsequently, the enzyme breaks down other viral polyproteins, which is essential for the virus to mature. The enzyme undergoes significant mutation within HIV-infected individuals. This leads to the emergence of drug-resistant mutants due to selective pressure from treatment.
Description
HIV-1 protease is a functional homodimer with a molecular weight of 21.6kDa. Each monomer consists of 99 amino acids and has a molecular weight of 10.8kDa.
Physical Appearance
The product is a clear, colorless solution that has been sterilized by filtration.
Formulation
The HIV-1 Protease solution, which has been filtered through a 0.4µm filter, is supplied in a buffer consisting of 20mM Tris, 20mM MES, 200mM NaCl, 1mM EDTA, 10% (v/v) glycerol, and 0.05% 2-mercaptoethanol, at pH 6.5.
Stability
For optimal storage, keep the product refrigerated at 4°C if you plan to use the entire vial within 2 to 4 weeks. For prolonged storage, it is recommended to freeze the product at -20°C. To maintain product integrity, avoid repeated freeze-thaw cycles.
Purity
SDS-PAGE analysis indicates a purity level exceeding 95.0%.
Source
Escherichia Coli.
Amino Acid Sequence

PQITLWQRPL VTIKIGGQLK EALLDTGADD TVLEEMNLPG RWKPKMIGGI GGFIKVRQYD QILIEICGHK AIGTVLVGPT PVNIIGRNLL TQIGCTLNF.

Kinetic Parameters
Km=15.1µM, Kcat = 30s-1, Kcat/Km= 1981 mM-1s-1 with peptide substrate KARVF (NO2)VRKA (F(NO2) ... p-nitrophenylalanine).

Product Science Overview

Introduction

HIV-1 protease is a crucial enzyme in the life cycle of the Human Immunodeficiency Virus type 1 (HIV-1), the virus responsible for Acquired Immunodeficiency Syndrome (AIDS). This enzyme is essential for the maturation of viral particles, making it a key target for antiretroviral therapy. The recombinant form of HIV-1 protease has been extensively studied to understand its structure, function, and role in drug resistance.

Discovery and Structural Insights

The first high-resolution structure of HIV-1 protease was published in 1989 by scientists at Merck Sharp and Dohme Research Laboratories. They used recombinant protease expressed in bacteria, which revealed essential features of the enzyme’s catalytic apparatus . This breakthrough paved the way for the development of protease inhibitors, a class of antiretroviral drugs that have significantly improved the management of HIV/AIDS.

Biological Properties and Function

HIV-1 protease is a homodimeric enzyme belonging to the aspartate family, also known as aspartyl retropepsin . It plays a crucial role in the viral maturation process by cleaving the Gag and Gag-Pol polyproteins into functional viral proteins. This cleavage is essential for the assembly of mature, infectious viral particles.

Recombinant HIV-1 Protease

Recombinant HIV-1 protease is produced using genetic engineering techniques, where the protease gene is cloned and expressed in a suitable host, such as bacteria. This allows for the production of large quantities of the enzyme for research purposes. The recombinant form retains the same structural and functional properties as the native enzyme, making it an invaluable tool for studying the enzyme’s characteristics and interactions with inhibitors.

Drug Development and Resistance

The structural insights gained from studying recombinant HIV-1 protease have been instrumental in the development of protease inhibitors. These drugs bind to the active site of the enzyme, preventing it from cleaving the viral polyproteins and thereby inhibiting viral replication. However, the high mutation rate of HIV-1 leads to the emergence of drug-resistant strains. Understanding the impact of individual protease mutations on drug susceptibility is crucial for developing more effective therapies .

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