Barley yellow dwarf virus 5'UTR
Barley yellow dwarf virus 5' UTR is a non-coding RNA element containing structural elements required for translation of the viral genome.
| Barley yellow dwarf virus 5' UTR | |
|---|---|
 Conserved secondary structure of BYDV 5' UTR. | |
| Identifiers | |
| Symbol | BYDV 5'UTR |
| Rfam | RF01508 |
| Other data | |
| RNA type | cis-regulatory element |
| Domain(s) | barley yellow dwarf |
| PDB structures | PDBe |
Unlike eukaryotic mRNA, this virus lacks a 5' cap and a poly(A) tail but still circularises its mRNA through base pairing between two stem loops, one located in the 5' UTR and the other within the 3' UTR. The structure within the 3' UTR has been previously characterised as the 3' cap-independent translation element (3' TE element) and the 5' UTR of barley yellow dwarf virus has been predicted to contain 4 stem loop structures.[1] Mutagenesis showed that stem loop 4 is essential for base pairing with 3'TE and only 5 bases are needed to base pair for mRNA circularization to occur.[2]
References
- Wang S, Browning KS, Miller WA (July 1997). "A viral sequence in the 3'-untranslated region mimics a 5' cap in facilitating translation of uncapped mRNA". The EMBO Journal (Free full text). 16 (13): 4107–4116. doi:10.1093/emboj/16.13.4107. PMC 1170033. PMID 9233819.
- Guo L, Allen EM, Miller WA (May 2001). "Base-pairing between untranslated regions facilitates translation of uncapped, nonpolyadenylated viral RNA". Molecular Cell. 7 (5): 1103–1109. doi:10.1016/S1097-2765(01)00252-0. PMID 11389856.
Further reading
Malys N, McCarthy JE (March 2011). "Translation initiation: variations in the mechanism can be anticipated". Cellular and Molecular Life Sciences. 68 (6): 991–1003. doi:10.1007/s00018-010-0588-z. PMID 21076851.