Antitumor action of seminal ribonuclease, its dimeric structure, and its resistance to the cytosolic ribonuclease inhibitor.
Biochemistry
; 40(12): 3492-6, 2001 Mar 27.
Article
en En
| MEDLINE
| ID: mdl-11297415
ABSTRACT
Bovine seminal RNase (BS-RNase) is a homodimeric enzyme with a cytotoxic activity selective for tumor cells. In this study, the relationships of its cytotoxic activity to its dimeric structure and its resistance to the cytosolic RNase inhibitor (cRI) are investigated systematically by site-directed mutagenesis. The results show that (1) the dimericity of BS-RNase is essential for its full cytotoxic action; (2) the role of the dimeric structure in the antitumor activity is that of making the enzyme insensitive to the cytosolic RNase inhibitor; (3) a RNase may not be completely insensitive to cRI to exploit a full cytotoxic potential.
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Colección:
01-internacional
Asunto principal:
Semen
/
Proteínas
/
Citosol
/
Endorribonucleasas
/
Inhibidores Enzimáticos
/
Antineoplásicos
Límite:
Animals
Idioma:
En
Revista:
Biochemistry
Año:
2001
Tipo del documento:
Article
País de afiliación:
Italia