Turning a hobby into a job: how duplicated genes find new functions.
Gene duplication provides raw material for functional innovation. Recent advances have shed light on two fundamental questions regarding gene duplication: which genes tend to undergo duplication? And how does natural selection subsequently act on them? Genomic data suggest that different gene classes tend to be retained after single-gene and whole-genome duplications. We also know that functional differences between duplicate genes can originate in several different ways, including mutations that directly impart new functions, subdivision of ancestral functions and selection for changes in gene dosage. Interestingly, in many cases the 'new' function of one copy is a secondary property that was always present, but that has been co-opted to a primary role after the duplication.
Conant
Gavin C
GC
Division of Animal Sciences, University of Missouri-Columbia, 163B Animal Sciences Center, 920 East Campus Drive, Columbia, Missouri 65211-5300, USA.
Wolfe
Kenneth H
KH
D000818:Animals; D005686:Galactokinase / Q000235:genetics; D018628:Gene Dosage; D020440:Gene Duplication; D015870:Gene Expression; D016678:Genome; D006801:Humans; D009154:Mutation; D012441:Saccharomyces cerevisiae / Q000235:genetics; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics; D012641:Selection, Genetic; D014157:Transcription Factors / Q000235:genetics
C099289:Gal3 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; D014157:Transcription Factors; C524219:GAL1 protein, S cerevisiae; D005686:Galactokinase