Streptomyces erythraeus trypsin inactivates α1-antitrypsin.
FEBS Lett
; 585(24): 3898-902, 2011 Dec 15.
Article
in En
| MEDLINE
| ID: mdl-22115549
ABSTRACT
Streptomyces erythraeus trypsin (SET) is a serine protease that is secreted extracellularly by S. erythraeus. We investigated the inhibitory effect of α(1)-antitrypsin on the catalytic activity of SET. Intriguingly, we found that SET is not inhibited by α(1)-antitrypsin. Our investigations into the molecular mechanism underlying this observation revealed that SET hydrolyzes the Met-Ser bond in the reaction center loop of α(1)-antitrypsin. However, SET somehow avoids entrapment by α(1)-antitrypsin. We also confirmed that α(1)-antitrypsin loses its inhibitory activity after incubation with SET. Thus, our study demonstrates that SET is not only resistant to α(1)-antitrypsin but also inactivates α(1)-antitrypsin.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Trypsin
/
Alpha 1-Antitrypsin
/
Saccharopolyspora
Language:
En
Journal:
FEBS Lett
Year:
2011
Document type:
Article
Affiliation country: