FK-506 binding protein from Tolypocladium inflatum: resistance of FKBP/FK-506 complex against proteolysis.
A 12-kDa peptidyl-prolyl-cis/trans-isomerase was purified 225-fold to homogeneity from the cyclosporin producing fungus Tolypocladium inflatum. The enzyme is highly sensitive to the immunosuppressant FK-506 but not to cyclosporin and thus belongs to the class of FK-506 binding proteins (FKBP). Interestingly the FKBP/FK-506 complex is resistant against proteolytic digestion by the endoproteases GluC and LysC, in contrast to the free FKBP, which is readily cleaved by these proteases. This protection may play a role in the effects of FK-506 in the living cell.
Institut für Biochemie und Molekulare Biologie, Technische Universität Berlin, FRG.
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Lee
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Hoffmann
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Zocher
D000591:Amino Acid Isomerases / Q000302:isolation & purification / Q000378:metabolism*; D000595:Amino Acid Sequence; D002352:Carrier Proteins / Q000302:isolation & purification / Q000378:metabolism*; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D003524:Cyclosporins / Q000378:metabolism; D004591:Electrophoresis, Polyacrylamide Gel; D007525:Isoelectric Focusing; D007700:Kinetics; D003904:Mitosporic Fungi / Q000378:metabolism*; D008969:Molecular Sequence Data; D008970:Molecular Weight; D009842:Oligopeptides; D019696:Peptidylprolyl Isomerase; D013379:Substrate Specificity; D016559:Tacrolimus / Q000378:metabolism* / Q000494:pharmacology; D022021:Tacrolimus Binding Proteins
D002352:Carrier Proteins; D003524:Cyclosporins; D009842:Oligopeptides; D000591:Amino Acid Isomerases; D022021:Tacrolimus Binding Proteins; D019696:Peptidylprolyl Isomerase; D016559:Tacrolimus