Dissecting the activating mutations in v-erbB of avian erythroblastosis virus strain R

H. K.G. Shu, R. J. Pelley, H. J. Kung

研究成果: 雜誌貢獻文章

22 引文 (Scopus)

摘要

The v-erbB oncogene isolated from the R (or ES4) strain of avian erythroblastosis virus is capable of inducing erythroleukemia and fibrosarcomas. This oncogene differs from the proto-oncogene c-erbB, the avian homolog of the epidermal growth factor receptor, by its lack of an intact ligand-binding domain as well as additional alterations in its cytoplasmic coding sequences. By contrast, the insertionally activated c-erbB, a variant oncogene, which encodes a product that also lacks the ligand-binding domain but is otherwise unaltered in its cytoplasmic coding sequences, is capable of inducing leukemia but cannot induce sarcomas. In this report, we show that the critical changes for activating the sarcomagenic potential displayed by v-erbB R are two point mutations within the tyrosine kinase domain and an internal deletion of 21 amino acids in the carboxyl-terminal regulatory domain. The removal of the carboxyl-terminal autophosphorylation sites is not obligatory. These activating mutations (Arg-263 to His, Ile-384 to Ser, and the deletion of residues 494 to 514), when introduced singly into the insertionally activated c-erbB, all dramatically increase fibroblast-transforming potential. Arg-263 resides near the highly conserved HRD motif of the kinase domain, and its mutation to His increases the autophosphorylation activity. The other two mutations do not alter the intrinsic kinase activity and presumably affect other aspects of the receptor involved in growth signaling. Therefore, the high transforming potential of v-erbB R is a consequence of synergism among multiple activating mutations.
原文英語
頁(從 - 到)6173-6180
頁數8
期刊Journal of Virology
65
發行號11
出版狀態已發佈 - 一月 1 1991
對外發佈Yes

指紋

Avian erythroblastosis virus
Alpharetrovirus
oncogenes
mutation
Mutation
phosphotransferases (kinases)
protein phosphorylation
Oncogenes
Phosphotransferases
Ligands
erbB-1 Genes
proto-oncogenes
Leukemia, Erythroblastic, Acute
fibrosarcoma
Proto-Oncogenes
Fibrosarcoma
sarcoma
synergism
point mutation
leukemia

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

引用此文

Dissecting the activating mutations in v-erbB of avian erythroblastosis virus strain R. / Shu, H. K.G.; Pelley, R. J.; Kung, H. J.

於: Journal of Virology, 卷 65, 編號 11, 01.01.1991, p. 6173-6180.

研究成果: 雜誌貢獻文章

Shu, H. K.G. ; Pelley, R. J. ; Kung, H. J. / Dissecting the activating mutations in v-erbB of avian erythroblastosis virus strain R. 於: Journal of Virology. 1991 ; 卷 65, 編號 11. 頁 6173-6180.
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