Sandbox Reserved 168: Difference between revisions
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== SKI protein == | == SKI protein == | ||
<Structure load='1sbx' size='500' frame='true' align='right' caption='No caption inserted~~~~' scene='Insert optional scene name here' /> | <Structure load='1sbx' size='500' frame='true' align='right' caption='No caption inserted~~~~' scene='Insert optional scene name here' /> | ||
== Background == | == Background == | ||
The SKI protein was first identified as an oncoprotein. An oncoprotein is one that has the potential to cause abnormal cellular proliferation if mutated or if expressed in quantitative amounts. Although, for a time the method by which the SKI protein acquired such capabilities was unknown, it was recently discovered that SKI interacts with smad after stimulation by TGF-beta. TGF-beta are proteins directly associated with proliferation and cellular differentiation, while smads are transcription factors that transduce transforming growth factor-betar(TGF-beta) members to activate transcription. SKI blocks the activation of transcription witht eh smad complexes which makes the cells resistant to the inhibitory reactions of normal growth induced by TGF-beta. Note that the stimulation of TGF-beta may cause the rapid degradation of SKI. However, after a relatively brief amount of time its expression is strongly induced. <ref name="SKI protein"> Reed JA, Lin Q, Chen D, Mian IS, Medrano EE. SKI Pathways Inducing Progression of Human Melanoma. June 2005. http://www.ncbi.nlm.nih.gov/pubmed/15986136</ref>. | The SKI protein was first identified as an oncoprotein. An oncoprotein is one that has the potential to cause abnormal cellular proliferation if mutated or if expressed in quantitative amounts. Although, for a time the method by which the SKI protein acquired such capabilities was unknown, it was recently discovered that SKI interacts with smad after stimulation by TGF-beta. TGF-beta are proteins directly associated with proliferation and cellular differentiation, while smads are transcription factors that transduce transforming growth factor-betar(TGF-beta) members to activate transcription. SKI blocks the activation of transcription witht eh smad complexes which makes the cells resistant to the inhibitory reactions of normal growth induced by TGF-beta. Note that the stimulation of TGF-beta may cause the rapid degradation of SKI. However, after a relatively brief amount of time its expression is strongly induced. <ref name="SKI protein"> Reed JA, Lin Q, Chen D, Mian IS, Medrano EE. SKI Pathways Inducing Progression of Human Melanoma. June 2005. http://www.ncbi.nlm.nih.gov/pubmed/15986136</ref>. | ||