deaminase
LowTechnical/Scientific
Definition
Meaning
An enzyme that catalyzes the removal of an amino group from a molecule.
In molecular biology and biochemistry, a deaminase is an enzyme critical for processes like nucleotide editing, amino acid metabolism, and DNA/RNA modification. The term is also used in enzyme naming conventions (e.g., adenosine deaminase, cytidine deaminase).
Linguistics
Semantic Notes
The word is almost exclusively used in biochemistry, molecular biology, and genetics. It is a compound noun derived from 'de-' (removal) + 'amine' + '-ase' (enzyme suffix). It refers to a class of enzymes, not a single entity.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling conventions follow standard UK/US patterns for scientific terms (e.g., 'catalyse' vs. 'catalyze' in surrounding text).
Connotations
Purely technical with no regional connotations.
Frequency
Equally low frequency in both varieties, confined to specialised literature.
Vocabulary
Collocations
Grammar
Valency Patterns
NOUN + deaminase (e.g., adenosine deaminase)deaminase + NOUN (e.g., deaminase activity)deaminase + VERB (e.g., the deaminase removes/catalyzes)Vocabulary
Synonyms
Neutral
Weak
Vocabulary
Antonyms
Usage
Context Usage
Business
Not used.
Academic
Used in biochemistry and genetics research papers, textbooks, and lectures.
Everyday
Not used.
Technical
Core term in laboratory protocols, pharmaceutical research (e.g., drug targets for deaminase inhibitors), and genetic engineering discussions.
Examples
By Part of Speech
adjective
British English
- The deaminase domain was crystallised.
- A deaminase-deficient mutant was analysed.
American English
- The deaminase domain was crystallized.
- A deaminase-deficient mutant was analyzed.
Examples
By CEFR Level
- Scientists study deaminase enzymes in the lab.
- Adenosine deaminase deficiency can cause severe immune system problems.
- The research focused on the cytidine deaminase family.
- APOBEC cytidine deaminases are crucial for innate antiviral immunity and are implicated in cancer mutagenesis.
- The novel deaminase variant exhibited unprecedented substrate specificity, catalysing the reaction at a markedly faster rate.
Learning
Memory Aids
Mnemonic
Think: DE-AMINE-ASE. DE (off/remove) + AMINE (the chemical group) + ASE (enzyme). An enzyme that takes the amine group off.
Conceptual Metaphor
A molecular 'editor' or 'eraser' that specifically removes amino groups from biomolecules.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid literal translation or confusion with 'дезаминирование' (the process) – 'deaminase' is the enzyme ('дезаминаза').
- Do not confuse with 'dehydrogenase' (дегидрогеназа), which removes hydrogen.
Common Mistakes
- Misspelling as 'deaminaze' or 'deaminace'.
- Incorrect stress: /ˈdiːəmɪneɪz/ instead of /diˈæmɪneɪz/.
- Using it as a verb (e.g., 'to deaminase').
Practice
Quiz
What is the primary function of a deaminase enzyme?
FAQ
Frequently Asked Questions
No, it is a highly specialised term used almost exclusively in biochemistry, molecular biology, and related fields.
No. The verb form is 'to deaminate'. 'Deaminase' is strictly a noun referring to the enzyme that performs deamination.
'Deamination' is the chemical process of removing an amino group. A 'deaminase' is the specific enzyme that catalyzes (speeds up) that process.
Yes, they are typically named after their substrate, such as adenosine deaminase (acts on adenosine), cytidine deaminase (acts on cytidine), or APOBEC (acts on cytosine in DNA/RNA).