title: A characteristic difference among GroEL homologs from intracellular symbionts of closely-interrelated species of aphid.
abstract: Nucleotide sequences encoding GroEL homologs of intracellular symbionts in three closely interrelated aphids were compared with one another and that for GroEL. It was suggested that in these proteins a particular position is highly susceptible to amino acid substitution, through which the GroEL homologs of symbionts seemed to have acquired a unique function on top of the activity as molecular chaperone. This may represent a rare example of non-neutral evolution of molecule under the positive selection pressure.
authors.affiliation: Department of Biological Sciences, Graduate School of Science, University of Tokyo, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Komaki
authors.forename: S
authors.initials: S
authors.lastname: Sato
authors.forename: H
authors.initials: H
authors.lastname: Ishikawa
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001042:Aphids / Q000382:microbiology*; D001419:Bacteria / Q000737:chemistry*; D001483:Base Sequence; D018834:Chaperonin 60 / Q000235:genetics*; D008969:Molecular Sequence Data; D013045:Species Specificity; D013559:Symbiosis
chemical_list: D018834:Chaperonin 60