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Plant viruses can be pathogenic to vascular plants ("higher plants"). Most plant viruses are rod-shaped, with protein discs forming a tube surrounding the viral genome; isometric particles are another common structure. They rarely have an envelope. The great majority have an RNA genome, which is usually small and single stranded (ss), but some ...
DPVweb is an aid to researchers in the field of plant virology as well as an educational resource for students of virology and molecular biology.. The site provides a single point of access for all known plant virus genome sequences making it easy to collect these sequences together for further analysis and comparison.
Geminiviridae is a family of plant viruses that encode their genetic information on a circular genome of single-stranded (ss) DNA. There are 522 species in this family, assigned to 15 genera. There are 522 species in this family, assigned to 15 genera.
Genome sizes and corresponding composition of six major model organisms as pie charts. The increase in genome size correlates with the vast expansion of noncoding (i.e., intronic, intergenic, and interspersed repeat sequences) and repeat DNA (e.g., satellite, LINEs, short interspersed nuclear element (SINEs), DNA (Alu sequence), in red) sequences in more complex multicellular organisms.
The genome organization and RNA synthesis of order Mononegavirales. A virus is a member of the order Mononegavirales if [2] [3]. its genome is a linear, typically (but not always) nonsegmented, single-stranded, non-infectious RNA of negative polarity; possesses inverse-complementary 3' and 5' termini; and is not covalently linked to a protein;
The first genome to be sequenced was that of the virus φX174 in 1977; [4] the first genome sequence of a prokaryote (Haemophilus influenzae) was published in 1995; [5] the yeast (Saccharomyces cerevisiae) genome was the first eukaryotic genome to be sequenced in 1996. [6]
Baltimore classification groups viruses together based on their manner of mRNA synthesis. Characteristics directly related to this include whether the genome is made of deoxyribonucleic acid (DNA) or ribonucleic acid (RNA), the strandedness of the genome, which can be either single- or double-stranded, and the sense of a single-stranded genome, which is either positive or negative.
Viruses are the most abundant biological entities on Earth, but challenges in detecting, isolating, and classifying unknown viruses have prevented exhaustive surveys of the global virome. [25] Over 5 Tb of metagenomic sequence data were used from 3,042 geographically diverse samples to assess the global distribution, phylogenetic diversity, and ...