What is the structure of tobacco mosaic virus?

Tobacco mosaic virus (TMV) is a rod-shaped particle, 300 nm long, consisting of 2130 identical protein submits of 17,500 MW arranged as a helix around an RNA molecule of 2 × 106 MW.

What tissue does tobacco mosaic virus affect?

The tobacco mosaic virus infects tobacco and lots of other closely related species like tomatoes and peppers. It is transmitted by contact between plants, either naturally or on the hands of farmers. It infects the chloroplasts of plant leaves and changes their colour from green to yellow or white in a mosaic pattern.

What is unique about tobacco mosaic virus?

Tobacco mosaic virus causes a mottled browning of tobacco leaves, and accordingly is of major economic importance. It also infects other crops, most notably tomatoes. The virus is spread mechanically from infected plants to scratched or damaged leaves of normal plants.

What does tobacco mosaic virus destroy?

Although tobacco mosaic virus (TMV) is named for the first plant in which it was discovered (tobacco) back in the 1800s, it infects over 150 different types of plants. Among plants affected by TMV are vegetables, weeds and flowers. Tomato, pepper and many ornamental plants are struck annually with TMV.

How is the replication of tobacco mosaic virus?

The replication of tobacco mosaic virus (TMV) RNA involves synthesis of a negative–strand RNA using the genomic positive–strand RNA as a template, followed by the synthesis of positive–strand RNA on the negative–strand RNA templates.

How is the replication of TMV carried out?

The replication of tobacco mosaic virus (TMV) RNA involves synthesis of a negative-strand RNA using the genomic positive-strand RNA as a template, followed by the synthesis of positive-strand RNA on the negative-strand RNA templates.

How big is the tobacco mosaic virus ( TMV )?

M. Hema, M.R.N. Murthy, in Recent Developments in Applied Microbiology and Biochemistry, 2019. Tobacco mosaic virus (TMV; Tobamovirus, Virgaviridae) is a rodlike virus with a length of 300 nm and diameter of 18 nm.

What are the four proteins in tobacco mosaic virus?

Therefore an understanding of virus infection processes also offers insight into normal host physiological processes. Tobacco mosaic virus (TMV) encodes four known functional proteins: the 126 and 183 kDa replication-associated proteins, the movement protein (MP), and the structural capsid or coat protein (CP).