PROTEIN WORLD STUDIED BY PROTEIN DISTRIBUTION IN FAMILIES

点击翻译按钮获取中文摘要

The validity of the concept of protein world was investigated by analyzing all amino acid sequences from the total genomes of many organisms, using a high performance membrane protein predictor. The analyses of the distribution of exons containing membrane spanning regions lead to the conclusion that the exon shuffling extensively occurred in eukaryotic genomes. The number distribution of transmembrane regions in membrane proteins was analyzed for real genomes and simulated genomes of prokaryotic genomes. The result indicated that the single exponential distribution is due to the equilibrium of the change in the transmembrane numbers. The results for both eukaryotes and prokaryotes suggested that the families of membrane proteins have already reached to the equilibrium of random processes in genomes.