Hepatitis C virus p7 protein (p7)

The Hepatitis C virus p7 protein is a 63-amino acid membrane protein located between the E2 envelope protein and NS2 protease in the HCV polyprotein[5][7]. It features two transmembrane alpha helices connected by a conserved, cytosolic loop, and localizes mainly to the endoplasmic reticulum but can also be found near mitochondria and at the plasma membrane[1][4]. p7 oligomerizes to form hexameric or heptameric ion channels that selectively conduct cations and possibly protons, serving a crucial role in dissipating the acidic environment of cellular organelles required for efficient viral assembly, maturation, and secretion of infectious virions[1][2][4][7]. p7’s ion channel function is distinct from host ion channels; its activity can be blocked by small-molecule inhibitors such as amantadine and rimantadine, although genotype-dependent differences affect drug susceptibility[2][3]. Additionally, p7 participates in virus-specific assembly processes involving direct interactions with other HCV proteins, such as NS2, E1, E2, core, and NS5A, independent of its ion channel function[1][4]. The essential role of p7 in the HCV life cycle, alongside the feasibility of small-molecule inhibition, establishes it as a validated antiviral drug target under continued investigation. If more structured data about its amino acid sequence, 3D structure, or experimental drug candidates is needed, molecular databases (e.g., RCSB for 2M6X[2]) can provide direct access to such entries.

Other names

HCV p7p7 viroporin

Blockade of p7 ion channel pore (amantadine, rimantadine); Prevention of p7 oligomerization or interactions with viral/host factors; Disruption of pH gradient modulation within host cell organelles[2][3][6]