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Picornavirus IRES: structure function relationship
Encarnación Martínez-Salas1, Olga Fernández-Miragall
1Centro de Biología Molecular Severo Ochoa, CSIC-UAM, Cantoblanco, 28049 Madrid, Spain. emartinez@cbm.uam.es
Current Pharmaceutical Design
|December 8, 2004
Summary
Picornavirus infections pose a significant health challenge. Understanding the picornavirus internal ribosome entry site (IRES) and its interaction with RNA-binding proteins is key to developing new antiviral strategies.
Area of Science:
- Virology
- Molecular Biology
- Biochemistry
Background:
- Picornavirus infections are a significant human health concern.
- Picornaviruses possess a unique genome organization featuring a structured 5' untranslated region with an internal ribosome entry site (IRES).
- The IRES element enables cap-independent translation initiation, crucial for viral protein synthesis during host cell shutoff.
Purpose of the Study:
- To detail the structure and function of picornavirus IRES elements.
- To elucidate the role of conserved motifs within the IRES.
- To explore the interplay between IRES RNA structure and RNA-binding proteins in viral pathogenesis.
Main Methods:
- Analysis of conserved motifs in picornavirus IRES elements.
- Investigation of RNA-binding protein interactions with IRES RNA.
- Review of recent data on IRES structure-function relationships.
Main Results:
- Picornavirus IRES elements are highly structured with phylogenetically conserved motifs essential for activity.
- RNA-binding proteins significantly influence IRES activity and viral pathogenesis.
- The interplay between IRES structure and protein recognition is critical for IRES function.
Conclusions:
- Understanding picornavirus IRES mechanisms is vital for antiviral development.
- Targeting viral RNA, specifically the IRES element, offers a promising antiviral strategy.
- The interaction between IRES RNA structure and host/viral proteins is a key determinant of viral replication and pathogenesis.