Scientists from the Indian Institute of Science Education and Research Bhopal (IISER Bhopal) have identified a critical circular RNA (circRNA) called ‘ciTRAN’ that plays a pivotal role in the replication of the HIV-1 virus responsible for AIDS. Circular RNAs differ from traditional linear RNAs by forming closed-loop structures and are essential for various biological processes, including gene expression regulation. The researchers developed a novel technique, ‘circDR-Seq,’ to detect circRNAs in HIV-1-infected T-cells. They found that ciTRAN interacts with a protein called serine/arginine-rich splicing factor 1 (SRSF1), promoting efficient viral transcription by preventing SRSF1 from its typical functions. This discovery sheds light on HIV-1’s replication mechanisms.
Facts/Terms for UPSC Prelims
- Circular RNA (circRNA): A type of RNA molecule that forms a closed-loop structure and plays a role in regulating gene expression and various biological processes.
- HIV-1: Human Immunodeficiency Virus type 1, responsible for causing Acquired Immunodeficiency Syndrome (AIDS).
- T-cells: White blood cells (lymphocytes) that play a central role in the immune system’s defense against infections.
- Gene Expression Regulation: The control of the rate and manner in which genes are transcribed and translated into proteins, crucial for normal cellular function.
- Serine/Arginine-Rich Splicing Factor 1 (SRSF1): A protein involved in RNA splicing, which can also have an impact on gene expression regulation and viral replication.
- Viral Transcription: The process by which a virus copies its genetic material to produce more viral particles, allowing it to replicate within host cells.