Molecular and phylogenetic analysis of pyridoxal phosphate-dependent acyltransferase of Exiguobacterium acetylicum.
The pyridoxal-5'-phosphate (PLP)-dependent family of enzymes is a very diverse group of proteins that metabolize small molecules like amino acids and sugars, and synthesize cofactors for other metabolic pathways through transamination, decarboxylation, racemization, and substitution reactions. In this study we employed degenerated primer-based PCR amplification, using genomic DNA isolated from the soil bacterium Exiguobacterium acetylicum strain SN as template. We revealed the presence of a PLP-dependent family of enzymes, such as PLP-dependent acyltransferase, and similarity to 8-amino-7-oxononoate synthase. Sequencing analysis and multiple alignment of the thymidine-adenine-cloned PCR amplicon revealed PLP-dependent family enzymes with specific confering codes and consensus amino acid residues specific to this group of functional proteins. Amino acid residues common to the majority of PLP-dependent enzymes were also revealed by the Lasergene MegAlign software. A phylogenetic tree was constructed. Its analysis revealed a close relationship of E. acetylicum to other bacteria isolated from extreme environments suggesting similarities in anabolic adaptability and evolutionary development.
Kentucky State University, Frankfort, KY-40601, USA. narayanan.rajendran@kysu.edu
Narayanan
N
Rajendran
Colby
C
Smith
Williard
W
Mazhawidza
D000217:Acyltransferases / Q000235:genetics* / Q000378:metabolism; D000595:Amino Acid Sequence; D020029:Base Pairing; D001483:Base Sequence; D003352:Corynebacterium / Q000145:classification / Q000201:enzymology / Q000235:genetics*; D004269:DNA, Bacterial / Q000235:genetics; D008969:Molecular Sequence Data; D010802:Phylogeny; D016133:Polymerase Chain Reaction / Q000379:methods; D011732:Pyridoxal Phosphate / Q000235:genetics / Q000378:metabolism*; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid
D004269:DNA, Bacterial; D011732:Pyridoxal Phosphate; D000217:Acyltransferases