Notes on Genus: Spiromicrovirus

icosahedra
icosahedra

Type member: Spiroplasma phage 4

Contents

General Description

This is one of the genera in the family Microviridae. Members infect mycoplasmas.

Morphology

Virions isometric (icosahedral), not enveloped, 26-32 nm in diameter with small surface projections.

Genome

Monopartite, positive sense, circular ssDNA c. 4.5 kb in length.

Genus Genomic Organization

About 9 ORFs are translated from closely spaced or overlapping genes.

Type Member Genomic Organization

There are 9 closely spaced or overlapping ORFs:
ORFkDa
P137.5
P24.4
P33.6
P48.1
P511.4
P617.1
P7 capsid protein60.4
P813.8
P96.1