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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Molecular cloning of a novel mammalian calcium-dependent protease distinct from both m- and mu-types. Specific expression of the mRNA in skeletal muscle.

Two types of calcium-dependent protease with distinct calcium requirements (termed muCANP and mCANP) are known in mammalian tissues. These two isozymes consist of different large (80-kDa) subunits (mu- or m-types) and identical small (30-kDa) subunits. By screening human and rat muscle cDNA libraries with a cDNA probe for the chicken CANP large subunit, which has a structure similar to both the mammalian mu- and m-types, a cDNA clone encoding a novel member of the CANP large subunit family was obtained. The encoded protein (designated " p94") consists of 821 amino acid residues (Mr 94,084) and shows significant sequence homology with both human mu-type (54%) and m-type (51%) large subunits. p94 can be divided into four domains (I-IV) as reported for the CANP large subunit family. Domains II and IV are potential cysteine protease and calcium-binding domains, respectively, and have sequences homologous to the corresponding domains of other CANP large subunits. However, domain I of p94 is significantly different from others. Moreover, p94 contains two unique sequences of 62 and 77 residues in domains II and III, respectively. In contrast to the ubiquitous expression of mu- and m-types, Northern blot analysis revealed that the mRNA for p94 exists only in skeletal muscle with none detected in other tissues including heart muscle and smooth muscles such as intestine.[1]

References

  1. Molecular cloning of a novel mammalian calcium-dependent protease distinct from both m- and mu-types. Specific expression of the mRNA in skeletal muscle. Sorimachi, H., Imajoh-Ohmi, S., Emori, Y., Kawasaki, H., Ohno, S., Minami, Y., Suzuki, K. J. Biol. Chem. (1989) [Pubmed]
 
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