The genetic code and the origin of life
β Scribed by Josef Berger
- Publisher
- Springer
- Year
- 1976
- Tongue
- English
- Weight
- 248 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0001-5342
No coin nor oath required. For personal study only.
β¦ Synopsis
The problem of the origin of life understandably counts as one of the most exciting questions in the natural sciences, but in spite of almost endless speculation on this subject, it is still far from its final solution. The complexity of the functional correlation between recent nucleic acids and proteins can e.g. give rise to the assumption that the genetic code (and life) could not originate on the Earth. It was Portelli (1975) who published the hypothesis that the genetic code could not originate during the history of the Earth. In his opinion the recent genetic code represents the informational message transmitted by living systems of the previous cycle of the Universe. Here however, we defend the existence of a certain strategy in the syntheses of the genetic code during the history of the Earth. The strategy of correlation between amino acid and nucleotide polymers made an increasing velocity of the chemical evolution possible, that is, it increased the velocity of formation of the genetic code. Thus, life with the recent genetic code could originate on the Earth within the present cycle of the Universe.
π SIMILAR VOLUMES
L, length of protein; RBS, ribosome binding site; ribo-X, ribosome evolved to reduce premature termination; ribo-Q, ribosome further evolved to process quadruplet codons with high efficiency; S, Shannon entropy.
We argue that a primitive genetic code with only 20 separate words explains that there are 20 coded amino acids in modern life. The existence of 64 words on the modern genetic code requires modern life to read almost exclusively one strand of DNA in one direction. In our primitive code, both the ori