Dictionary > Ribozyme

Ribozyme

Definition
noun, plural: ribozymes
RNA molecule that acts as an enzyme in the aminotransferase activity of the ribosome and in the cleavage of its own or another RNA
Supplement
Ribozymes are RNA enzymes that catalyze certain biochemical reactions, such as in the aminotransferase activity of the ribosome and in the cleavage (or ligation) of its own or another RNA. They are also observed to participate in viral replication.
Ribozyme occurs within the ribosome. Ribosomes are biomolecules in the cytoplasm that participate in protein synthesis. Ribosomal RNAs form the two subunits of ribosome, particularly the large subunit and the small subunit. It is the large subunit of the ribosome that acts as ribozyme, catalyzing peptide bond formation between two amino acids.
The discovery of ribozyme in 1982 led to the thought that RNA can be a genetic material as well as a biological catalyst, and therefore, contributed to the RNA world hypothesis. This hypothesis proposed that RNA might have been essential in the evolution of prebiotic self-replicating systems. The study of ribozymes is referred to as ribozymology.
Examples of ribozymes are hammerhead ribozyme, hairpin ribozyme, and leadzyme.
Also called:

  • RNAzyme
  • ribonucleic acid enzyme
  • RNA enzyme

See also:

  • ribosome
  • ribosomal RNA
  • ribonucleic acid
  • Related term(s):


    You will also like...

    temperature - abiotic factor
    Abiotic and Biotic Factors

    This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

    human respiratory system
    Respiration

    The human respiratory system is an efficient system of inspiring and expiring respiratory gases. This tutorial provides ..

    Regulation of Biological Systems
    Regulation of Biological Systems

    Regulation of Biological Systems tutorials are focused on the modulation of biological systems from cell to population l..

    Cell structure
    Cell Structure

    A typical eukaryotic cell is comprised of cytoplasm with different organelles, such as nucleus, endoplasmic reticulum, G..

    Transpiration
    Water in Plants

    The movement of molecules (specifically, water and solutes) is vital to the understanding of plant processes. This tuto..

    Human Nervous System
    The Human Nervous System

    The nervous system is essentially a biological information highway. This tutorial gives an overview of the nervous syste..