Virulence Region
Genes in the virulence region are grouped into the operons virABCDEFG, which code for the enzymes responsible for mediating transduction of T-DNA to plant cells.
- virA codes for a receptor which reacts to the presence of phenolic compounds such as acetosyringone, syringealdehyde or acetovanillone which leak out of damaged plant tissues.
- virB encodes proteins which produce a pore/pilus-like structure.
- virC binds the overdrive sequence.
- virD1 and virD2 produce endonucleases which target the direct repeat borders of the T-DNA segment, vir E Binds to T-strand protecting it from nuclease attack, and intercalates with lipids to form channels in the plant membranes through which the T-complex passes, beginning with the right border.
- virG (TRANSCRIPTIONAL FACTOR) activates vir-gene expression after binding to a consensus sequence, once it has been phosphorylated by virA.
Read more about this topic: Ti Plasmid
Famous quotes containing the word region:
“In that region there were shepherds living in the fields, keeping watch over their flock by night. Then an angel of the Lord stood before them, and the glory of the Lord shone around them, and they were terrified.”
—Bible: New Testament, Luke 2:8,9.