Phylogenic analysis of rickettsial patatin-like protein with conserved phospholipase A2 active sites.
Genome analysis of Rickettsia felis highlighted the presence of three patatin-like protein (PLP) genes (pat1, pat2A, and pat2B), whereas only one PLP gene (pat1) is found in the other sequenced rickettsial genomes. Here, we aligned the rickettsial PLPs with characterized patatins from plants and found that they possess all the conserved amino acid residues identified as important for phospholipase A(2) activity. We also carried out a phylogenic analysis of the rickettsial PLPs together with bacterial and eukaryotic homologs. The phylogeny of the rickettsial Pat1 proteins is in conflict with the currently recognized Rickettsia phylogeny. Possible scenarios that might explain this incongruence are discussed and involve either gene conversion or gene duplication events.
IGS-CNRS UPR 2589, 13385 Marseille, France.
Guillaume
G
Blanc
Patricia
P
Renesto
Didier
D
Raoult
D000595:Amino Acid Sequence; D001665:Binding Sites; D002265:Carboxylic Ester Hydrolases / Q000737:chemistry* / Q000235:genetics* / Q000378:metabolism; D017124:Conserved Sequence; D019143:Evolution, Molecular; D008969:Molecular Sequence Data; D010741:Phospholipases A / Q000235:genetics*; D054467:Phospholipases A2; D010802:Phylogeny; D010940:Plant Proteins / Q000737:chemistry* / Q000235:genetics* / Q000378:metabolism; D041161:Rickettsia felis / Q000201:enzymology / Q000235:genetics*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
D010940:Plant Proteins; C043222:patatin protein, Solanum tuberosum; D002265:Carboxylic Ester Hydrolases; D010741:Phospholipases A; D054467:Phospholipases A2