Transcriptase

Part of speech: noun

Definitions

1. An enzyme responsible for the production of RNA using a DNA template is essential for gene expression and replication
2. this molecular catalyst plays a pivotal role in converting genetic information from DNA to RNA, impacting protein synthesis
3. A key enzyme that facilitates the synthesis of RNA based on a DNA template is crucial for both the expression of genes and the process of viral replication

Etymology: Transcriptase is a plain technical coinage with no older history behind it. It is built from "transcript" and the suffix "-ase", the standard ending chemists use for enzymes. The "-ase" ending came from "diastase", the first enzyme ever isolated, discovered in 1833 by the French chemists Anselme Payen and Jean-François Persoz, who named it from a Greek word meaning "to separate" (the enzyme breaks starch apart). That ending was then applied to any newly discovered enzyme, so "-ase" now marks a whole family of names. "Transcript" here carries its biological sense: a copy of genetic information.