ribozyme
UK[ˈraɪbəʊzaɪm]US[ˈraɪboʊzaɪm]
n
An RNA molecule capable of acting as a catalyst in biochemical reactions.
Morpheme Breakdown
ribo
zyme
ribo
ribonucleic acid
zyme
enzyme
Etymology
The term 'ribozyme' is a modern scientific portmanteau, coined in the 1980s following the discovery of catalytic RNA. It fuses the prefix 'ribo-', from 'ribonucleic acid' (RNA), with the suffix '-zyme', from the Greek 'zymē' (leaven), the root of the word 'enzyme'. The logic is direct and descriptive: a 'ribozyme' is literally an RNA-based enzyme. This construction highlights a fundamental shift in biological understanding, proving that catalytic function, once thought to be the exclusive domain of protein enzymes, could also be performed by genetic material itself.
Analysis
Structure: ribo (ribonucleic acid) + zyme (enzyme)
- ribo: A combining form derived from "ribonucleic acid" (RNA), itself from "ribose" (a sugar) and "nucleic acid". Its functional role is to specify the type of nucleic acid involved.
- zyme: A combining form derived from the Greek "zymē", meaning "leaven" or "ferment". Its functional role is to denote an enzyme, a substance that catalyzes a reaction.
Examples
The discovery of the ribozyme challenged the long-held belief that all biological catalysts are proteins.
Some ribozymes are involved in cutting and joining RNA strands during processing.
Researchers are studying ribozymes for potential therapeutic applications.