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Medical Definition of Oncogene proteins v-erba
1. Transforming proteins encoded by erba oncogenes from the avian erythroblastosis virus. They are truncated versions of c-erba, the thyroid hormone receptor (receptors, thyroid hormone) that have retained both the DNA-binding and hormone-binding domains. Mutations in the hormone-binding domains abolish the transcriptional activation function. V-erba acts as a dominant repressor of c-erba, inducing transformation by disinhibiting proliferation. (12 Dec 1998)