Two genetic codes: Repetitive syntax for active non-coding RNAs; non-repetitive syntax for the DNA archives

Area of Science:

• Molecular Biology
• Genetics
• Evolutionary Biology

Background:

• The RNA world hypothesis suggests RNA preceded DNA and proteins.
• Two distinct nucleotide sequence syntaxes exist in the living world: repetitive and non-repetitive.

Purpose of the Study:

• To investigate the functional significance of distinct RNA sequence syntaxes.
• To explore the analogy between RNA genetic codes and natural language structures.

Main Methods:

• Comparative analysis of non-coding RNA and protein-coding RNA sequences.
• Functional characterization of RNA sequence properties.

Main Results:

• Non-coding RNAs exhibit repetitive nucleotide syntax, facilitating regulatory roles in genetic processes.
• Protein-coding RNAs display non-repetitive syntax, crucial for information storage and complex protein architecture.
• The distinct syntaxes correlate with their respective functions, analogous to language.

Conclusions:

• The differentiation in RNA sequence syntax is functionally relevant.
• RNA's dual coding system, with repetitive and non-repetitive sequences, supports diverse biological roles.
• This framework may elucidate RNA group behavioral motifs and evolutionary strategies.