one gene–one enzyme hypothesis

E561767

The one gene–one enzyme hypothesis is a foundational concept in genetics proposing that each gene encodes a specific enzyme that affects a single step in a metabolic pathway.

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Statements (44)

Predicate Object
instanceOf concept in molecular biology ⓘ
genetic hypothesis ⓘ
historical scientific theory ⓘ
associatedAward Nobel Prize in Physiology or Medicine 1958 ⓘ
associatedLaureate Edward Tatum ⓘ
George Beadle ⓘ
linked to: George W. Beadle
basedOn experiments with Neurospora crassa ⓘ
category history of genetics ⓘ
scientific models ⓘ
clarified functional role of genes in metabolism ⓘ
consequence established genes as determinants of specific biochemical steps ⓘ
coreIdea each enzyme affects a single step in a metabolic pathway ⓘ
each gene encodes a specific enzyme ⓘ
demonstratedBy correlation between specific mutations and specific enzymatic defects ⓘ
field biochemistry ⓘ
genetics ⓘ
molecular biology ⓘ
hasImplication genotype can be inferred from metabolic phenotype ⓘ
mutant phenotypes can map to specific biochemical steps ⓘ
historicalContext pre-DNA era of genetics ⓘ
historicalPrecursor concept of inborn errors of metabolism ⓘ
influenced development of molecular genetics ⓘ
understanding of gene–protein relationships ⓘ
inspiredBy Archibald Garrod's work on inborn errors of metabolism ⓘ
limitation genes can produce multiple polypeptides via alternative splicing ⓘ
not all gene products are enzymes ⓘ
some enzymes consist of multiple polypeptide subunits encoded by different genes ⓘ
some genes encode functional RNAs rather than proteins ⓘ
proposedBy Edward Tatum ⓘ
George Beadle ⓘ
linked to: George W. Beadle
refinedTo one gene–one RNA hypothesis ⓘ
one gene–one polypeptide hypothesis ⓘ
relatedConcept central dogma of molecular biology ⓘ
gene expression ⓘ
metabolic genetics ⓘ
relatesTo enzyme specificity ⓘ
gene function ⓘ
metabolic pathways ⓘ
status historically important but oversimplified ⓘ
supports link between genes and biochemical reactions ⓘ
teaches mutations in a single gene can block a specific metabolic step ⓘ
testedIn auxotrophic mutants of Neurospora crassa ⓘ
usedIn early biochemical genetics research ⓘ
yearProposed 1941 ⓘ

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Referenced by (3)

Full triples — surface form annotated when it differs from this entity's canonical label.

Neurospora crassa → historicallyImportantExperiment → one gene–one enzyme hypothesis ⓘ
George W. Beadle → notableWork → Genetic control of biochemical reactions in Neurospora ⓘ
linked to: one gene–one enzyme hypothesis
Edward Tatum → notableWork → one gene–one enzyme hypothesis ⓘ