CATH Classification

Domain Context

CATH Clusters

Superfamily Trypsin-like serine proteases
Functional Family Inactive serine protease 45

Enzyme Information

3.4.21.59
Tryptase.
based on mapping to UniProt Q15661
Preferential cleavage: Arg-|-Xaa, Lys-|-Xaa, but with more restricted specificity than trypsin.
-!- Occurs as a tetrameric molecule with high affinity for heparin, in mast cell granules. -!- Not inhibited by alpha-1-proteinase inhibitor of alpha-2- macroglobulin. -!- Belongs to peptidase family S1.

UniProtKB Entries (1)

Q15661
TRYB1_HUMAN
Homo sapiens
Tryptase alpha/beta-1

PDB Structure

PDB 1LTO
External Links
Method X-RAY DIFFRACTION
Organism Pichia
Primary Citation
The Crystal Structure of Human alpha1-Tryptase Reveals a Blocked Substrate-binding Region
Marquardt, U., Zettl, F., Huber, R., Bode, W., Sommerhoff, C.P.
J.MOL.BIOL.