Intrinsically unstructured proteins evolve by repeat expansion

Article Abstract:

Research reveals that unstructured proteins arise from expansion of internal repeat regions as seen in a preponderance of repeats in 126 protein sequences. Data indicate that tandemly repeated segments account for 39% in Swiss-Prot, 18% in yeast and 28% in human proteins. Furthermore, the repetitive segments are involved in fundamental functions of the unstructured proteins.

Hungary, Genomes, Structure-activity relationships (Biochemistry), Protein structure, Amino acid sequence, Amino acid sequencing

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Speciation and inversions: chimps and humans

Article Abstract:

Research suggests that our ancestral species, chimpanzees, via a divergent process involving gene flow and chromosomal inversions evolved into human species. Recent evidence suggests an effect of inversions on local recombinant rates, in which a high rate of amino-acid substitution within regions of divergence between humans and chimpanzees occur by inversions.

Influence, Human evolution, Chimpanzees, Inversion (Genetics), Speciation, Inversions (Genetics)

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Photosynthetic eukaryotes unite: endosymbiosis connects the dots

Article Abstract:

This review presents the algal diversity and their evolution through endosymbiotic process. Research findings indicate that a previously non-photosynthetic protist gave rise to eukaryotic algae through endocytosis of a procaryotic cyanobacterium. The role of endosymbiosis and the exent of endosymbiotic gene transfer are discussed.

Prokaryotes, Eukaryotes, Origin, Genetic transformation

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