Unexpected crucial role of residue 225 in serine proteases.
Guinto, E.R., Caccia, S., Rose, T., Futterer, K., Waksman, G., Di Cera, E.(1999) Proc Natl Acad Sci U S A 96: 1852-1857
- PubMed: 10051558 
- DOI: 10.1073/pnas.96.5.1852
- Primary Citation of Related Structures:  
1B7X, 1THP, 2THF - PubMed Abstract: 
Residue 225 in serine proteases of the chymotrypsin family is Pro or Tyr in more than 95% of nearly 300 available sequences. Proteases with Y225 (like some blood coagulation and complement factors) are almost exclusively found in vertebrates, whereas proteases with P225 (like degradative enzymes) are present from bacteria to human ...