Proviral insertions within the int-2 gene can generate multiple anomalous transcripts but leave the protein-coding domain intact
Proviral insertions within the int-2 gene can generate multiple anomalous transcripts but leave the protein-coding domain intact
复制标题
int-2 基因内的前病毒插入可产生多个异常转录本，但使蛋白质编码结构域保持完整
作者：
C. Dickson;R. Smith;S. Brookes;G. Peters
We examined the effects of mouse mammary tumor virus integration on the multiple RNA transcripts expressed from the int-2 proto-oncogene in virally induced breast tumors. Proviral insertion either upstream or downstream of the gene could simultaneously activate transcription from three dissimilar int-2 promoters. In some tumors, the activating provirus lies within the transcription unit and disrupts the structures of the various RNAs. Insertions in the 5' region of the gene had complex effects depending on the orientation and position of the provirus relative to the three promoters and intron-exon boundaries. RNase protection experiments identified transcripts initiated in the viral long terminal repeat, at normal and cryptic sites in the int-2 sequences, and from cryptic promoters in an inverted provirus. AT the 3' end, insertions occurred within the untranslated trailer and provided alternative termination signals that substituted for one or both of the normal the poly(A) addition sites. However, in no instance, of the 20 tumors analyzed in detail, did a provirus perturb the presumed open reading frame of the gene. These data strongly implicate the normal product of the int-2 gene, which is related to the fibroblast growth factor family, as a contributory factor in virally induced mammary tumors.
鸡 c-myc 编码区的 5 核苷酸序列：大多数禽白血病病毒诱导的淋巴瘤中 myc 转录物中不存在的非编码外显子的定位。
DOI：
10.1073/pnas.81.15.4697
发表时间：
1984
影响因子：
11.1
作者：
Shih,CK;Linial,M;Goodenow,MM;Hayward,WS
通讯作者：
Hayward,WS