Some of the most common mutations associated with cancer are found in the small G protein Ras. Oncogenic mutants of Ras lead to constitutive signaling. Suggest several possible mechanisms for why these forms of Ras show constitutive signaling. Conversely, mutations of Ras have been isolated that have dominant-negative activity (that is, they block signaling by the normal, endogenous G protein). Suggest possible mechanisms for how these mutants block signaling.
Some of the most common mutations associated with cancer are found in the small G protein Ras. Oncogenic mutants of Ras lead to constitutive signaling. Suggest several possible mechanisms for why these forms of Ras show constitutive signaling. Conversely, mutations of Ras have been isolated that have dominant-negative activity (that is, they block signaling by the normal, endogenous G protein). Suggest possible mechanisms for how these mutants block signaling.
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Some of the most common mutations associated with cancer are found in the small G protein Ras. Oncogenic mutants of Ras lead to constitutive signaling. Suggest several possible mechanisms for why these forms of Ras show constitutive signaling. Conversely, mutations of Ras have been isolated that have dominant-negative activity (that is, they block signaling by the normal, endogenous G protein). Suggest possible mechanisms for how these mutants block signaling.
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