title: A common evolutionary origin for tailed-bacteriophage functional modules and bacterial machineries.
abstract: Bacteriophages belonging to the order Caudovirales possess a tail acting as a molecular nanomachine used during infection to recognize the host cell wall, attach to it, pierce it, and ensure the high-efficiency delivery of the genomic DNA to the host cytoplasm. In this review, we provide a comprehensive analysis of the various proteins constituting tailed bacteriophages from a structural viewpoint. To this end, we had in mind to pinpoint the resemblances within and between functional modules such as capsid/tail connectors, the tails themselves, or the tail distal host recognition devices, termed baseplates. This comparison has been extended to bacterial machineries embedded in the cell wall, for which shared molecular homology with phages has been recently revealed. This is the case for the type VI secretion system (T6SS), an inverted phage tail at the bacterial surface, or bacteriocins. Gathering all these data, we propose that a unique ancestral protein fold may have given rise to a large number of bacteriophage modules as well as to some related bacterial machinery components.
authors: Architecture et Fonction des Macromolécules Biologiques (AFMB), UMR 6098 CNRS, and Universités Aix-Marseille I & II, Campus de Luminy, Case 932, 13288 Marseille Cedex 09, France. david.veesler@afmb.univ-mrs.fr
authors: David
authors: D
authors: Veesler
authors: Christian
authors: C
authors: Cambillau
mesh_terms: D001419:Bacteria / Q000378:metabolism* / Q000821:virology; D001430:Bacteriocins / Q000378:metabolism; D001435:Bacteriophages / Q000235:genetics / Q000378:metabolism*; D005075:Biological Evolution
chemical_list: D001430:Bacteriocins