Origins of Life, RNA world or alternative RNA world
نویسندگان
چکیده
منابع مشابه
The origins of the RNA world.
The general notion of an "RNA World" is that, in the early development of life on the Earth, genetic continuity was assured by the replication of RNA and genetically encoded proteins were not involved as catalysts. There is now strong evidence indicating that an RNA World did indeed exist before DNA- and protein-based life. However, arguments regarding whether life on Earth began with RNA are m...
متن کاملLife from an RNA World
platelet serotonin levels. Curiously, both groups of rats differ noticeably from their wild-type counterparts only when confronted with an environmental or pharmacological challenge. The book then goes on to describe the interaction between the serotonin system and other neurotransmitters, particularly dopamine, in models of drug reward. Primates, like humans, have complex social lives yet can ...
متن کاملThe RNA World: molecular cooperation at the origins of life : Nature Reviews Genetics : Nature Publishing Group
The RNA World concept posits that there was a period of time in primitive Earth's history — about 4 billion years ago — when the primary living substance was RNA or something chemically similar. In the past 50 years, this idea has gone from speculation to a prevailing idea. In this Review, we summarize the key logic behind the RNA World and describe some of the most important recent advances th...
متن کاملThe Lipid-RNA World
The simplest possible beginning of abiogenesis has been a riddle from the last century, which is most successfully solved by the Lipid World hypothesis. However, origin of the next stages of evolution starting form lipids is still in dark. We propose a ‘Lipid-RNA World Scenario’ based on the assumption that modern stable lipid-RNA interactions are molecular fossils of an ancient stage of evolut...
متن کاملBrave new RNA world.
In 1995, you could still find, in the opening paragraphs of manuscripts and grant applications from my lab and others, the phrase “In the absence of a crystal structure for the ribosome....,” by way of rationalizing any number of biochemical studies aimed at figuring out the three-dimensional locations of things inside the ribosome, and ultimately its mechanism. We no longer have this excuse. T...
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ژورنال
عنوان ژورنال: Cell & Developmental Biology
سال: 2012
ISSN: 2168-9296
DOI: 10.4172/2168-9296.1000e102