G. Chen et al., EFFICIENT TRANSCRIPTION FROM THE RICE TUNGRO BACILLIFORM VIRUS PROMOTER REQUIRES ELEMENTS DOWNSTREAM OF THE TRANSCRIPTION START SITE, Journal of virology, 70(12), 1996, pp. 8411-8421
Elements downstream of the transcription start site enhance the activi
ty of the rice tungro bacilliform virus (RTBV) promoter in protoplasts
derived from cultured rice cells. This enhancer region was located to
the first 90 nucleotides of the RTBV leader sequence. Within this reg
ion, at least two components which act together to enhance expression
from the RTBV promoter could be identified. One is a position- and ori
entation-independent DNA element within a CT-rich region, and the othe
r is a position-dependent element. Either element was found to be capa
ble of acting independently on a heterologous promoter. The enhancer a
ctivity of the DNA element correlates with specific binding of nuclear
proteins. Nuclear proteins also recognize an RNA transcript covering
the first 90 nucleotides of the RTBV leader.