HUMAN CALCINEURIN &COMPLEXES W/ IMMUNOPHILIN/DRUG COMPLEXES
Stanford University, Stanford CA
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Abstract
Calcineurin (CaN) is a Ca2+- and calmodulin (CaM) binding protein first discovered in brain tissue in 1978 and subsequently found in many different tissue types. It is a hetero dimer composed of a large "A" subunit (60kDa) and a small "B" subunit (18kDa). CaN-A is a class 2B protein phosphatase which contains an autoinhibitory region as well as separate domains for CaN-B and CaM binding. The discovery that CaN binds to immunosuppressive drug-immunophilin complexes inplicated this enzyme as a central component of the immune response system. This proposal applies for time to collect data on heavy atom derivatives for phasing and on CaN/immunophillin-drug complexes.
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