title: An inception report on the TOM complex of the Amoeba Acanthamoeba castellanii, a simple model protozoan in mitochondria studies.
abstract: It is suggested that in the course of the TOM complex evolution at least two lineages have appeared: the animal-fungal and green plant ones. The latter involves also the TOM complexes of algae and protozoans. The amoeba Acanthamoeba castellanii is a free-living non-photosynthetic soil protozoan, whose mitochondria share many bioenergetic properties with mitochondria of plants, animals and fungi. Here, we report that a protein complex, identified electrophysiologically as the A. castellanii TOM complex, contains a homologue of yeast/animal Tom 70. Further, molecular weight of the complex (about 500 kDa) also points to A. castellanii evolutionary relation with fungi and animal. Thus, the data indicates that the TOM complex of A. castellanii is not a typical example of the protozoan TOM complex.
authors.affiliation: Laboratory of Bioenergetics, Institute of Molecular Biology and Biotechnology, Adam Mickiewicz University, Fredry 10, 61-701, Poznan, Poland.
authors.forename: Malgorzata
authors.initials: M
authors.lastname: Wojtkowska
authors.forename: Natalia
authors.initials: N
authors.lastname: Szczech
authors.forename: Olgierd
authors.initials: O
authors.lastname: Stobienia
authors.forename: Wieslawa
authors.initials: W
authors.lastname: Jarmuszkiewicz
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Budzinska
authors.forename: Hanna
authors.initials: H
authors.lastname: Kmita
mesh_terms: D048248:Acanthamoeba castellanii / Q000235:genetics* / Q000378:metabolism / Q000648:ultrastructure; D000595:Amino Acid Sequence; D000818:Animals; D002352:Carrier Proteins / Q000235:genetics* / Q000378:metabolism; D016054:DNA, Protozoan / Q000235:genetics; D019143:Evolution, Molecular; D013058:Mass Spectrometry; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism; D008928:Mitochondria / Q000235:genetics / Q000378:metabolism*; D033681:Mitochondrial Membrane Transport Proteins; D000090622:Mitochondrial Precursor Protein Import Complex Proteins; D008969:Molecular Sequence Data; D011485:Protein Binding; D012441:Saccharomyces cerevisiae / Q000235:genetics / Q000378:metabolism; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism
chemical_list: D002352:Carrier Proteins; D016054:DNA, Protozoan; D008565:Membrane Proteins; D033681:Mitochondrial Membrane Transport Proteins; D000090622:Mitochondrial Precursor Protein Import Complex Proteins; D029701:Saccharomyces cerevisiae Proteins; C489039:TOM70 protein, S cerevisiae