Recombination of protein domains facilitated by co-translational folding in eukaryotes.
The evolution of complex genomes requires that new combinations of pre-existing protein domains successfully fold into modular polypeptides. During eukaryotic translation model two-domain polypeptides fold efficiently by sequential and co-translational folding of their domains. In contrast, folding of the same proteins in Escherichia coli is posttranslational, and leads to intramolecular misfolding of concurrently folding domains. Sequential domain folding in eukaryotes may have been critical in the evolution of modular polypeptides, by increasing the probability that random gene-fusion events resulted in immediately foldable protein structures.
Netzer
W J
WJ
Cellular Biochemistry & Biophysics Program, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.
Hartl
F U
FU
D000818:Animals; D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism; D001665:Binding Sites; D003001:Cloning, Molecular; D003600:Cytosol / Q000378:metabolism; D004926:Escherichia coli / Q000235:genetics / Q000378:metabolism; D005057:Eukaryotic Cells / Q000378:metabolism; D019143:Evolution, Molecular; D006801:Humans; D051379:Mice; D014176:Protein Biosynthesis; D017510:Protein Folding; D011499:Protein Processing, Post-Translational; D011993:Recombinant Fusion Proteins / Q000378:metabolism; D011995:Recombination, Genetic; D012270:Ribosomes / Q000378:metabolism; D013762:Tetrahydrofolate Dehydrogenase / Q000235:genetics / Q000378:metabolism; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism; D018631:ras Proteins / Q000235:genetics / Q000378:metabolism
D001426:Bacterial Proteins; D011993:Recombinant Fusion Proteins; D014157:Transcription Factors; D013762:Tetrahydrofolate Dehydrogenase; D018631:ras Proteins