Prokaryotes vs. Eukaryotes âDifferences. Eukaryotes as well as protists, a miscellany group made up of eukaryote-like plant, animal and fungi missing one or more characteristics to be defined as purely eukaryotic, differ greatly from prokaryotes in structure.
It is now clear that prokaryotic cells possess actin and that a dynamic actin-like cytoskeleton is involved in a variety of essential cellular processes in bacteria. These functions, like those of the eukaryotic actin cytoskeleton, require the targeting and accurate positioning of proteins and molecular complexes.he discovery of the prokaryotic homologues of actin (as well as of other cytoskeletal elements in bacteria) has forced a radical rethink about the origin of the cytoskeleton and revolutionized our view of bacterial cell architecture.
FtsA, MreB, MinD, and ParM are important components of the bacterial cytoskeleton that polymerize to perform a variety of functions including determining cell shape, protein localization, and DNA segregation.Their three dimensional structures are similar to those of actin despite differences in amino acid sequences.Actin proteins are highly conserved proteins which make up most of the eukaryotic cytoskeleton and can compose 10-20% of the total cellular protein. These thin filaments are involved in organelle transport, cell motility, and cytokinesis (OMIM).