まとめ
研究者らは,キルステン・マウリン・サーコマウイルス変異遺伝子に関連する機能的な遺伝子と擬似遺伝子を特定した. 遺伝子の複製と代替RNAスプライシングは,ウイルスの遺伝子と偽遺伝子の両方を生成した可能性が高い.
科学分野:
- 分子生物学は分子生物学である.
- 遺伝学 遺伝学とは
- ウイルス学 ウイルス学 ウイルス学
背景:
- キルステン・マウリン・サーコマウイルス (KiMSV) には,腫瘍発生に関与する変異遺伝子 (v-Ki-ras) が含まれています.
- ウイルス性腫瘍遺伝子に関連する細胞遺伝子の起源と構造を理解することは,がん研究にとって極めて重要です.
研究 の 目的:
- v-Ki-ras遺伝子の同型であるヒトDNAロシの組織と核酸配列を分析する.
- これらのヒト遺伝子の複製物の機能的状態と進化的関係を決定する.
主な方法:
- 人間のゲノムDNAのDNAシーケンシング.
- ニュクレオチド配列の比較分析. ニュクレオチド配列の比較分析.
- RNAスプライシング分析.
主要な成果:
- v-Ki-rasに関連した2つのヒトの位置が特定されました: 1つの機能的な遺伝子と1つの処理された擬似遺伝子です.
- 機能遺伝子は,2つの最終的なコーディングエクソンを含んでいるが,それらは重複によって生じたようだ.
- 証拠によると,これらの複製されたエクソンを組み込んだ差異的にスプライスされたメッセンジャーRNA (mRNA) は,ウイルスの遺伝子と擬似遺伝子を生成する中間体であったことを示唆しています.
結論:
- 機能的なヒトの遺伝子と処理された擬似遺伝子は,共通の祖先の遺伝子から生まれた.
- 機能性遺伝子の代替RNAスプライシングは,2つの関連ポリペプチドの生成につながる可能性があります.
- このメカニズムは,ウイルスを変容する遺伝子や擬似遺伝子の生成に関する洞察を提供します.
関連する概念動画
Cancer-Critical Genes I: Proto-oncogenes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
The Ras Gene
The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a superfamily...
Ras is a superfamily...
Rous Sarcoma Virus (RSV) and Cancer
Rous Sarcoma virus or RSV was discovered by F. Peyton Rous in the year 1911 as a filterable transmissible agent that could cause tumors in chickens. He won a Nobel Prize for this discovery in 1966. His experiments clearly demonstrated that some cancers could be caused by infectious agents and led to the discovery of many more cancer-causing viruses in animals as well as humans.
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
RSV is a retrovirus that contains two copies of a plus-strand RNA genome. Its genome consists of four main open...
Small GTPases - Ras and Rho
Ras and Rho are small monomeric GTPases that act downstream of receptor tyrosine kinase (RTK) and regulate various cellular processes. These GTPases switch between active and inactive states by binding to guanine nucleotides.
Three regulatory proteins control their activity:
Three regulatory proteins control their activity:
Cancer-Critical Genes I: Proto-oncogenes
Genes usually encode proteins necessary for the proper functioning of a healthy cell. Mutations can often cause changes to the gene expression pattern, thereby altering the phenotype.
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
When the function of certain critical genes, especially those involved in cell cycle regulation and cell growth signaling cascades, gets disrupted, it upsets the cell cycle progression. Such cells with unchecked cell cycles start proliferating uncontrollably and eventually develop into tumors.
Such genes that act...
The Ras Gene
The Ras-gene-encoded proteins are regulators of signaling pathways controlling cell proliferation, differentiation, or cell survival. The Ras-gene family in humans constitutes three primary members—the HRas, NRas, and KRas. These genes code for four functionally distinct yet closely related proteins—the HRas, NRas, KRas4A, and KRas4B. The involvement of mutant Ras genes in human cancer was first discovered in 1982 and is among the most common causes of human tumorigenesis.
Ras is a superfamily...
Ras is a superfamily...


