Notes on Genus: Avsunviroid

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Type member: Avocado sunblotch viroid

Contents

General Description

This is one of three genera of viroids assigned to the family Avsunviroidae. All members of this family lack a central conserved region (CCR) and have the ability to self-cleave through hammerhead structures. This genus differs from other viroids in the family because its members have a rod-like structure, low (38%) G+C content and thermodynamically unstable hammerhead ribozymes.

Morphology

Like all viroids, they have no virions and encode no proteins.

Genome

One circular, single stranded molecule of RNA, 247-251 nucleotides long.

Genus Genomic Organization

The RNA is non-coding.

Type Member Genomic Organization

The genome consists of one circular, single stranded molecule of RNA, 247-251 nucleotides long, which is non-coding.