Structure of PDB 2ra3 Chain A Binding Site BS01

Receptor Information

>2ra3 Chain A (length=224) Species: 9606 (Homo sapiens)

IVGGYNCEENSVPYQVSLNSGYHFCGGSLINEQWVVSAGHCYKSRIQVRL
GEHNIEVLEGNEQFINAAKIIRHPQYDRKTLNNDIMLIKLSSRAVINAHV
STISLPTAPPATGTKCLISGWGNTASSGADYPDELQCLDAPVLSQAKCEA
SYPGKITSNMFCVGFLEGGKDSCQGDAGGPVVCNGQLQGVVSWGDGCAQK
NKPGVYTKVYNYVKWIKNTIAANS

Ligand information

• Ligand ID: CA
• InChI: InChI=1S/Ca/q+2
• InChIKey: BHPQYMZQTOCNFJ-UHFFFAOYSA-N
• SMILES:
  CACTVS 3.341: [Ca++]
  ACDLabs 10.04
  OpenEye OEToolkits 1.5.0: [Ca+2]
• Formula: Ca
• Name: CALCIUM ION
• DrugBank: DB14577
• PDB chain: 2ra3 Chain A Residue 1

Receptor-Ligand Complex Structure

Structure summary

• PDB: 2ra3 Structural Basis for Accelerated Cleavage of Bovine Pancreatic Trypsin Inhibitor (BPTI) by Human Mesotrypsin.
• Resolution: 1.46 Å
• Binding residue (original residue number in PDB): E70 N72 V75 E80
• Binding residue (residue number reindexed from 1): E52 N54 V57 E62
• Annotation score: 4

Enzymatic activity

• Catalytic site (original residue number in PDB): H57 D102 Q192 G193 D194 A195 G196
• Catalytic site (residue number reindexed from 1): H40 D84 Q174 G175 D176 A177 G178
• Enzyme Commision number: 3.4.21.4: trypsin.

Gene Ontology

Molecular Function

• GO:0004252 serine-type endopeptidase activity
• GO:0008236 serine-type peptidase activity
• GO:0046872 metal ion binding

Biological Process

• GO:0006508 proteolysis
• GO:0007586 digestion
• GO:0022617 extracellular matrix disassembly

Cellular Component

• GO:0005576 extracellular region
• GO:0005615 extracellular space
• GO:0062023 collagen-containing extracellular matrix
• GO:0072562 blood microparticle

External links

• PDB: RCSB:2ra3, PDBe:2ra3, PDBj:2ra3
• PDBsum: 2ra3
• PubMed: 18077447
• UniProt: P07477|TRY1_HUMAN Serine protease 1 (Gene Name=PRSS1)