The structure of the B subunit of calcineurin
Open Access
- 3 March 1984
- journal article
- Published by Wiley in JBIC Journal of Biological Inorganic Chemistry
- Vol. 139 (3), 663-671
- https://doi.org/10.1111/j.1432-1033.1984.tb08055.x
Abstract
The complete primary structure of the B subunit of calcineurin (protein phosphatase 2B) has been determined by automated sequence analysis. The protein consists of a single polypeptide chain of 168 residues, relative molecular mass 19200. The structure shows 35% identity with the sequence of calmodulin and 29% with troponin C. Homology is mainly confined to the regions of the four putative Ca2+-binding loops. The results demonstrate that the B subunit is a new member of this family of Ca2+-binding proteins. The N-terminal glycine residue is blocked with the C14-saturated fatty acid myristic acid and the first four residues are very similar to those of the catalytic subunit of cyclic-AMP-dependent protein kinase which also contains a myristoyl blocking group.Keywords
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