_EC 3.4.21.9 Enteropeptidase. 2 PDB entries  
EC 3.-.-.- Hydrolases. [17,508 PDB entries]
EC 3.4.-.- Acting on peptide bonds (peptide hydrolases). [5,631 PDB entries]
EC 3.4.21.- Serine endopeptidases. [2,051 PDB entries]
EC 3.4.21.9 Enteropeptidase. [2 PDB entries]    
1ekb

Reaction: Activation of trypsinogen by selective cleavage of 6-Lys-|-Ile-7 bond.
Other name(s): Enterokinase.
Comments: Activates trypsinogen. Not inhibited by protein inhibitors of trypsin. Belongs to peptidase family S1. Formerly Ec 3.4.4.8.
Links:   [IntEnz]   [ExPASy]   [KEGG]  

There are 2 PDB entries in enzyme class E.C.3.4.21.9

  PDB code Protein
1ekb
The serine protease domain of enteropeptidase bound to inhib asp-asp-asp-asp-lys-chloromethane
Source: Bos taurus. Cattle. Organism_taxid: 9913. Expressed in: escherichia coli bl21(de3). Expression_system_taxid: 469008. Synthetic: yes
Chain: B (235 residues) CATH domains: 2.40.10.10 2.40.10.10
4dgj
Structure of a human enteropeptidase light chain variant
Source: Homo sapiens. Human. Organism_taxid: 9606. Gene: tmprss15, entk, prss7. Expressed in: escherichia coli. Expression_system_taxid: 562
Chains: A, B, C, D (235 residues) CATH domains: 2.40.10.10 2.40.10.10