Related Experiment Video
Updated: Jun 24, 2026
05:46
Rapid Screening of HIV Reverse Transcriptase and Integrase Inhibitors
Published on: April 9, 2014
Characterization and structural analysis of HIV-1 integrase conservation
Francesca Ceccherini-Silberstein1, Isabelle Malet, Roberta D'Arrigo
1Department of Experimental Medicine, University of Rome Tor Vergata, Rome, Italy. ceccherini@med.uniroma2.it
AIDS Reviews
|March 18, 2009
Summary
HIV-1 integrase mutations conferring drug resistance are rare in treatment-naive patients. Conserved residues essential for integrase function are critical for designing new HIV-1 inhibitors with better resistance profiles.
Area of Science:
- Virology
- Drug Resistance Studies
- Structural Biology
Background:
- HIV-1 integrase is a key target for antiretroviral therapy, with drugs like raltegravir and elvitegravir available.
- Drug resistance arises from mutations in HIV-1 integrase, impacting treatment efficacy.
- Understanding mutation prevalence in treatment-naive individuals is crucial for clinical management.
Purpose of the Study:
- To characterize conserved residues and regions of HIV-1 integrase.
- To determine the prevalence of mutations associated with integrase inhibitor resistance in treatment-naive patients.
- To inform the rational design of novel HIV-1 integrase inhibitors.
Main Methods:
- Structural analysis of HIV-1 integrase.
- Literature review and data compilation from public databases (Los Alamos).
- Analysis of mutation prevalence in a cohort of HIV-1 subtype B-infected individuals (treatment-naive and treated).
Main Results:
- 62.5% of HIV-1 integrase residues are conserved (<1% variability) in treatment-naive patients.
- Residues critical for stability, DNA binding, and cofactor interaction are fully conserved.
- Primary resistance mutations (e.g., Y143R, Q148H/K/R) are absent or infrequent (<0.5%) in treatment-naive individuals.
Conclusions:
- HIV-1 integrase requires high amino acid conservation for in vivo function.
- Clinically relevant primary resistance mutations are rare in treatment-naive patients.
- Identifying conserved regions aids in developing new integrase inhibitors with improved resistance profiles.
Related Concept Videos
01:19Inhibitors of Virion Maturation and Assembly
As part of their replication cycle, certain viruses synthesize long precursor proteins called polyproteins within infected host cells. In human immunodeficiency virus (HIV), two major polyproteins are produced: Gag and Gag-Pol. The Gag polyprotein supplies the structural components of the virus, while Gag-Pol includes essential viral enzymes such as reverse transcriptase, integrase, and protease. After synthesis, these polyproteins move to the host cell membrane, where they assemble into an...
01:26Size and Structure of Viral Genomes
Viral genomes exhibit remarkable diversity in size, structure, and composition, influencing their replication strategies and interactions with host cells. These genomes consist of either DNA or RNA and may be linear or circular. Additionally, they can be single-stranded or double-stranded, with each configuration affecting how the virus propagates within a host. RNA viruses, for instance, generally have smaller genomes than DNA viruses, a factor that contributes to their high mutation rates and...
02:26Conservation of Protein Domains Over Different Proteins
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
01:49Conserved Binding Sites
Many proteins’ biological role depends on their interactions with their ligands, small molecules that bind to specific locations on the protein known as ligand-binding sites. Ligand-binding sites are often conserved among homologous proteins as these sites are critical for protein function.
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
Binding sites are often located in large pockets, and if their location on a protein’s surface is unknown, it can be predicted using various approaches. The energetic method computationally analyses the...
02:26Conservation of Protein Domains
Protein domains are small structurally independent units that are part of a single amino acid chain. Although these domains are often structurally independent, they may rely on synergistic effects to perform their functions as part of a larger protein. Protein domains may be conserved within the same organism, as well as across different organisms.
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
A limited set of protein domains often duplicate and recombine during evolution. These domains can be organized in different combinations to form...
01:56Structural Protein Function
Structural proteins are a category of proteins responsible for functions ranging from cell shape and movement to providing support to major structures such as bones, cartilage, hair, and muscles. This group includes proteins such as collagen, actin, myosin, and keratin.
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...
Collagen, the most abundant protein in mammals, is found throughout the body. In connective tissue, such as skin, ligaments, and tendons, it provides tensile strength and elasticity. In bones and teeth, it mineralizes to form...