Abstract
The family Geminiviridae includes viruses with mono- or bipartite single-stranded, circular DNA genomes of 2.5–5.2 kb. They cause economically important diseases in most tropical and subtropical regions of the world. Geminiviruses infect dicot and monocot plants and are transmitted by insect vectors. DNA satellites are associated with some geminiviruses. This is a summary of the International Committee on Taxonomy of Viruses (ICTV) Report on the family Geminiviridae which is available at ictv.global/report/geminiviridae.
Highlights
The family Geminiviridae includes viruses with mono- or bipartite single-stranded, circular DNA genomes of 2.5–5.2 kb
Translation Host range Taxonomy bean golden yellow mosaic virus (DNA-A: L01635, DNA-B: L01636), species Bean golden yellow mosaic virus, genus Begomovirus Twinned incomplete icosahedra, T=1, 22×38 nm with a single coat protein 2.5–5.2 kb of single-stranded, circular DNA, mono- or bipartite Complementary strand synthesized in the nucleus by host replication factors; double-s tranded circular molecules serve as templates for both transcription and replication; replication employs a rolling-circle mechanism and a recombination-dependent mechanism From transcribed mRNAs; members of some genera use transcript splicing Plants Realm Monodnaviria, kingdom Shotokuvirae, phylum Cressdnaviricota, class Repensiviricetes, order Geplafuvirales: >10 genera, >500 species
The structure of Ageratum yellow vein virus at 3.3 Å resolution shows that the N-terminus of capsid protein (CP) adopts three different conformations essential for building the interface between geminate halves (Fig. 1b) [2]
Summary
The family Geminiviridae includes viruses with mono- or bipartite single-stranded, circular DNA genomes of 2.5–5.2 kb. For maize streak virus (genus Mastrevirus), virions are 22×38 nm, consisting of two incomplete icosahedra (T=1) containing 110 capsid protein (CP) subunits organized as 22 pentameric capsomers (Table 1, Fig. 1a) [1]. Viruses in most genera of the family have monopartite genomes, whereas those in the genus Begomovirus have mono- or bipartite genomes.
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