Cloning and characterization of a Streptomyces antibioticus ATCC11891 cyclophilin related to Gram negative bacteria cyclophilins.
Cyclophilins are folding helper enzymes and represent a family of the enzyme class of peptidyl-prolyl cis-trans isomerases. Here, we report the molecular cloning and biochemical characterization of SanCyp18, an 18-kDa cyclophilin from Streptomyces antibioticus ATCC11891 located in the cytoplasm and constitutively expressed during development. Amino acid sequence analysis revealed a much higher homology to cyclophilins from Gram negative bacteria than to known cyclophilins from Streptomyces or other Gram positive bacteria. SanCyp18 is inhibited weakly by CsA, with a K(i) value of 21 microM, similar to cyclophilins from Gram negative bacteria. However, this value is more than 20-fold higher than the K(i) values reported for cyclophilins from other Gram positive bacteria, which makes SanCyp18 unique within this group. The presence of SanCyp18 in Streptomyces is likely due to horizontal gene transmission from Gram-negative bacteria to Streptomyces.
Departamento de Biología, Funcional, Facultad de Medicina, Universidad de Oviedo, Oviedo 33006, Spain.
Angel
A
Manteca
Thilo
T
Kamphausen
Jorg
J
Fanghanel
Gunter
G
Fischer
Jesus
J
Sanchez
D000595:Amino Acid Sequence; D001483:Base Sequence; D003001:Cloning, Molecular; D021983:Cyclophilins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism*; D003593:Cytoplasm / Q000201:enzymology; D017931:DNA Primers; D015964:Gene Expression Regulation, Bacterial; D015971:Gene Expression Regulation, Enzymologic; D006090:Gram-Negative Bacteria / Q000201:enzymology*; D006801:Humans; D007700:Kinetics; D008958:Models, Molecular; D008969:Molecular Sequence Data; D008970:Molecular Weight; D017433:Protein Structure, Secondary; D011994:Recombinant Proteins / Q000737:chemistry / Q000378:metabolism; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D013303:Streptomyces antibioticus / Q000201:enzymology* / Q000235:genetics / Q000254:growth & development; D013379:Substrate Specificity
D017931:DNA Primers; D011994:Recombinant Proteins; D021983:Cyclophilins