Hepatitis B Virus Particle (Dane)

Description

Rendered as a classic Dane particle, the hepatitis B virus appears as an enveloped, roughly spherical virion with a dense array of surface projections representing hepatitis B surface antigen (HBsAg) embedded in the lipid bilayer. Beneath the envelope sits the icosahedral nucleocapsid composed of hepatitis B core antigen (HBcAg), enclosing the relaxed circular, partially double stranded DNA genome and the viral polymerase. The same HBsAg proteins that stud the virion also form the abundant noninfectious spherical and filamentous subviral particles that circulate in patient serum, typically smaller than the complete virion and lacking the nucleocapsid. Understanding this surface architecture matters because HBsAg is the immunodominant target for neutralizing antibodies and the basis of recombinant HBV vaccination, while the preS1 region of the large surface protein mediates hepatocyte entry via the NTCP receptor at the basolateral membrane. This is why high circulating HBsAg can persist in chronic infection even when HBV DNA is suppressed on therapy, and why serologic markers (HBsAg, anti HBc IgM/IgG, HBeAg) correlate with different phases of disease rather than simply “presence or absence” of virus. Persistent cccDNA in hepatocyte nuclei drives relapse risk. Treatment decisions hinge on it. Use this 3D virology rendering in lectures on viral structure, hepatitis pathogenesis, or vaccine design, and in figures discussing HBV serology, immune escape, and the distinction between infectious virions and excess HBsAg decoys in blood. It also fits patient education materials on transmission routes (perinatal, sexual, percutaneous) and on monitoring for cirrhosis and hepatocellular carcinoma in chronic hepatitis B. Anatomical accuracy verified by SciePro's Medical Advisory Board.