Download MendeleyD-retrovirus morphogenetic switch driven by the targeting signal accessibility to Tctex-1 of dynein.
Vlach, J., Lipov, J., Rumlova, M., Veverka, V., Lang, J., Srb, P., Knejzlik, Z., Pichova, I., Hunter, E., Hrabal, R., Ruml, T.(2008) Proc Natl Acad Sci U S A 105: 10565-10570
- PubMed: 18647839
- DOI: https://doi.org/10.1073/pnas.0801765105
- Primary Citation of Related Structures:
2F76, 2F77 - PubMed Abstract:
Despite extensive data demonstrating that immature retroviral particle assembly can take place either at the plasma membrane or at a distinct location within the cytoplasm, targeting of viral precursor proteins to either assembly site still remains poorly understood. Biochemical data presented here suggest that Tctex-1, a light chain of the molecular motor dynein, is involved in the intracellular targeting of Mason-Pfizer monkey virus (M-PMV) polyproteins to the cytoplasmic assembly site. Comparison of the three-dimensional structures of M-PMV wild-type matrix protein (wt MA) with a single amino acid mutant (R55F), which redirects assembly from a cytoplasmic site to the plasma membrane, revealed different mutual orientations of their C- and N-terminal domains. This conformational change buries a putative intracellular targeting motif located between both domains in the hydrophobic pocket of the MA molecule, thereby preventing the interaction with cellular transport mechanisms.
Organizational Affiliation:
Laboratory of NMR Spectroscopy and Department of Biochemistry and Microbiology and Center of Applied Genomics, Institute of Chemical Technology, Prague, Technická 5, 16628 Prague, Czech Republic.
