Function and Biology

Virus-like Particle based on PVY coat protein with dC40 deletion with helical architecture encapsidating ssRNA

Source organism: Potato virus Y strain NTN
Biochemical function: not assigned
Biological process: not assigned
Cellular component: viral capsid

EC 3.4.22.45: Helper-component proteinase

Reaction catalysed:
Hydrolyzes a Gly-|-Gly bond at its own C-terminus, commonly in the sequence -Tyr-Xaa-Val-Gly-|-Gly, in the processing of the potyviral polyprotein.
Alternative Name(s):
  • HC-Pro

EC 3.4.22.44: Nuclear-inclusion-a endopeptidase

Reaction catalysed:
Hydrolyzes glutaminyl bonds, and activity is further restricted by preferences for the amino acids in P6 - P1' that vary with the species of potyvirus, e.g. Glu-Xaa-Xaa-Tyr-Xaa-Gln-|-(Ser or Gly) for the enzyme from tobacco etch virus. The natural substrate is the viral polyprotein, but other proteins and oligopeptides containing the appropriate consensus sequence are also cleaved.
Alternative Name(s):
  • Potyvirus NIa protease

GO terms

Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:

Sequence family

Pfam Protein family (Pfam)
PF00767
Domain description: Potyvirus coat protein
Occurring in:
  1. Genome polyprotein (Fragment)
The deposited structure of PDB entry 8ope contains 21 copies of Pfam domain PF00767 (Potyvirus coat protein) in Coat protein. Showing 1 copy in chain A [auth Aa].