Inhibiting KSHV replication by targeting the essential activities of KSHV processivity protein, PF-8

Area of Science:

• Virology
• Molecular Biology
• Structural Biology

Background:

• Kaposi's Sarcoma Herpesvirus (KSHV) causes lifelong infections with no current cure.
• KSHV establishes biphasic infections, with the lytic phase involving viral DNA replication.
• Seven viral DNA replication proteins, including the processivity factor (PF-8), are essential for genome synthesis during the lytic phase.

Purpose of the Study:

• To review molecular and structural studies of KSHV PF-8.
• To detail protein-protein and nucleic acid interactions critical for lytic DNA replication.
• To propose PF-8 as a potential antiviral target and explore pan-herpesvirus therapeutic strategies.

Main Methods:

• Review of existing molecular and structural studies on PF-8.
• Analysis of protein-protein and nucleic acid interaction data.
• Comparative analysis with Epstein-Barr virus processivity factors.

Main Results:

• PF-8 tethers DNA polymerase to DNA, ensuring efficient viral genome synthesis.
• PF-8 engages in self-association and interacts with other KSHV replication proteins and viral DNA.
• Similarities between KSHV PF-8 and Epstein-Barr virus processivity factors suggest broader therapeutic potential.

Conclusions:

• Inhibiting KSHV DNA replication by targeting PF-8 can reduce viral load and transmission.
• PF-8 is a promising target for developing novel antiviral therapies against KSHV.
• A pan-herpesvirus therapeutic strategy targeting homologous processivity factors is a viable future direction.