Vesiculovirus matrix proteins

Vesiculovirus Matrix Proteins

Structure of a vesiculovirus matrix protein.

Vesiculovirus matrix proteins are essential components of the Vesiculovirus genus, which is part of the Rhabdoviridae family. These proteins play a crucial role in the viral life cycle, particularly in the assembly and budding of new viral particles.

Structure

The matrix protein of vesiculoviruses is a multifunctional protein that forms a layer beneath the viral envelope. It is responsible for maintaining the structural integrity of the virus. The protein typically adopts a compact, globular structure, as illustrated in the image on the right, which shows the crystallographic structure of a vesiculovirus matrix protein.

Function

The primary function of the vesiculovirus matrix protein is to mediate the interaction between the viral nucleocapsid and the lipid bilayer of the host cell membrane. This interaction is critical for the budding process, where new virions are released from the host cell. The matrix protein also plays a role in inhibiting host cell transcription, thereby suppressing the host's immune response.

Role in Viral Assembly

During viral assembly, the matrix protein interacts with the glycoproteins embedded in the viral envelope and the nucleoproteins that encapsulate the viral RNA. This interaction ensures that the viral components are correctly packaged into new virions. The matrix protein's ability to self-associate and bind to the host cell membrane is essential for the formation of the viral envelope.

Pathogenesis

Vesiculoviruses, such as the Vesicular stomatitis virus (VSV), are known to cause disease in livestock and can occasionally infect humans. The matrix protein is a key determinant of the virus's pathogenicity, as it influences the virus's ability to evade the host immune system and establish infection.

Related pages

• Vesiculovirus
• Rhabdoviridae
• Vesicular stomatitis virus
• Viral matrix protein