acceptor RNA

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Definition

Noun A type of RNA molecule found within cells that plays a crucial role in protein synthesis. It is responsible for carrying a specific amino acid to the growing protein chain at a ribosome, ensuring the correct amino acid is added according to the genetic instructions provided by messenger RNA (mRNA).

Examples of Usage
  • During translation, each acceptor RNA molecule binds to its specific amino acid.
  • The ribosome reads the mRNA codon and matches it with the anticodon of the appropriate acceptor RNA.
  • The accuracy of protein synthesis depends on the correct pairing between the acceptor RNA and the mRNA template.
Advanced Usage
  • The term acceptor RNA is largely synonymous with the more commonly used term transfer RNA (tRNA). In modern biochemical literature, "tRNA" is the standard term.
  • It is described as an "acceptor" because one end of the molecule accepts, or becomes covalently bonded to, a specific amino acid.
Variants and Related Words
  • Transfer RNA (tRNA) (n): The standard and more frequently used term for acceptor RNA.
  • Aminoacyl-tRNA (n): The actual form of the molecule when it is charged with its specific amino acid, ready for protein synthesis.
Synonyms
  • Transfer RNA
  • tRNA
  • Soluble RNA (sRNA) (an older, less common synonym)
Related Phrases and Concepts
  • Anticodon: The three-nucleotide sequence on the acceptor RNA that base-pairs with a complementary codon on the mRNA.
  • Aminoacylation: The enzymatic process of attaching an amino acid to its corresponding acceptor RNA molecule.
  • Ribosome: The cellular structure where acceptor RNA delivers amino acids for protein assembly.
Noun
  1. RNA molecules present in the cell (in at least 20 varieties, each variety capable of combining with a specific amino acid) that attach the correct amino acid to the protein chain that is being synthesized at the ribosome of the cell (according to directions coded in the mRNA)

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