Rabbit testicular dipeptidyl carboxypeptidase activity was purified by a procedure exploiting its affinity for N-alpha-[1-(S)-carboxy-3-phenylpropyl]-L-lysyl-L-proline. The molecular, catalytic, and immunological properties of the testicular enzyme are presented and compared with the corresponding properties of pulmonary angiotensin-converting enzyme. Although catalytically similar and immunologically related to pulmonary dipeptidyl carboxypeptidase, the testicular enzyme has a molecular weight (100,000) which is lower by a factor of about one-third and differs in its NH2 and COOH termini. Furthermore, we present evidence that the testicular enzyme is not a post-translation product of the pulmonary type enzyme. These data suggest that testicular and pulmonary dipeptidyl carboxypeptidase are two distinct proteins which are catalytically similar and immunologically closely related.
Molecular and catalytic properties of rabbit testicular dipeptidyl carboxypeptidase.
Hamza A. El-DorryS,H G Bull,Kazushi Iwatal,N. Thornberry,E H Cordes,R. L. Soffers
Published 1982 in Journal of Biological Chemistry
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- Publication year
1982
- Venue
Journal of Biological Chemistry
- Publication date
1982-12-10
- Fields of study
Biology, Medicine, Chemistry
- Identifiers
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- Source metadata
Semantic Scholar, PubMed
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