Abstract:
:Immunoblot analysis of apple latent spherical cheravirus (ALSV)-infected leaves using a polyclonal antibody against the 21 C-terminal amino acids of a 53 K/42 K movement protein (MP) showed that a protein with an Mr of 42 kDa (42KP) is the dominant form found in vivo, which could indicate that the second AUG is used as an initiation codon of a ORF in RNA2. Co-expression of GFP with 42KP in tobacco epidermal cells showed that 42KP is able to facilitate cell-to-cell trafficking of GFP that is expressed in the same cells. The analysis of deletion mutants on each of MP, Vp24, Vp20, or Vp25 using an ALSV vector that stably expresses GFP indicated that an MP and three capsid proteins are all indispensable for the cell-to-cell movement of the virus. In ultrathin sections of infected leaves, a file of virus-like particles passing through the plasmodesmata connecting neighboring cells and tubular structures containing virus-like particles extending into the cytoplasm were observed. These results show that ALSV moves from cell to cell as virus particles.
journal_name
Arch Viroljournal_title
Archives of virologyauthors
Yoshikawa N,Okada K,Asamuma K,Watanabe K,Igarasi A,Li C,Isogai Mdoi
10.1007/s00705-005-0689-4keywords:
subject
Has Abstractpub_date
2006-05-01 00:00:00pages
837-48issue
5eissn
0304-8608issn
1432-8798journal_volume
151pub_type
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