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Yellow Lupine Cyclophilin Interacts with Nucleic Acids

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To investigate properties of yellow lupine cytosolic cyclophilin, an expression vector pET15CYP was constructed. The CyP cDNA (GenBank accession no.Y16088) reveals an open reading frame of 172 amino acids with the conserved tryptophan residue at position 128 and an insertion of seven amino acids spanning positions 48-54. Yellow lupine cyclophilin, purified after expression in E. coli cells, exhibits peptidyl-prolyl cis/trans isomerase activity when assayed with a synthetic oligopeptide. We have demonstrated that the recombinant cyclophilin is able to interact with nucleic acids, both single and double stranded DNA fragments as well as RNA.

Keywords: Cyclophilin; DNA-protein interaction; Isomerase; Protein expression

Document Type: Research Article


Publication date: 2008-07-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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