Notes on Genus: Cryspovirus
icosahedra
Type member: Cryptosporidium parvum virus 1
Contents
General Description
This genus in the family
Partitiviridae consists of a single species of virus that infects protozoa. The coat protein is substantially smaller than those of viruses in other genera of the family. It is named after the type (and only) species
Crypto
sporidium parvum
virus 1.
Morphology
Virions isometric (icosahedral), not enveloped, about 30 nm in diameter.
Genome
Linear, double stranded RNA of two segments, approximately 1.8 and 1.4 kb.
Genus Genomic Organization
The segments are monocistronic: RNA1 encodes RNA polymerase and RNA2 the coat protein.
Type Member Genomic Organization
- RNA1 (1786 nt): encodes an RNA polymerase of 62 kDa
- RNA2 (1374 nt): encodes the coat protein of 37 kDa