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Canine Distemper Virus (CDV) is a highly contagious virus affecting dogs and other wildlife, and its fusion (F) glycoprotein, synthesized as the inactive precursor F0, is essential for viral entry into host cells. The F0 protein undergoes proteolytic cleavage by host cell proteases to form the active F1 and F2 subunits, which remain linked by disulfide bonds; this cleavage is required for fusogenic activity. The F1 subunit contains a hydrophobic fusion peptide that inserts into the host cell membrane to initiate membrane fusion, while F2 contributes to receptor binding and structural stabilization. Viral entry begins when the CDV hemagglutinin (H) glycoprotein binds to a host cell receptor, triggering conformational changes in the F protein that enable F0 cleavage and subsequent fusion of the viral envelope with the host cell membrane, allowing nucleocapsid entry. Clinically, the F protein is a major target of the immune response, is included in vaccines, and is a key focus for antiviral drug development, as mutations in this protein can influence viral virulence, host range, and vaccine effectiveness; consequently, understanding the structure and function of the CDV fusion glycoprotein F0 is critical for developing effective vaccines, neutralizing antibodies, and therapeutic inhibitors.
仅用于科研。不用于诊断过程。未经明确授权不得转售。