Structure of PDB 1esb Chain A Binding Site BS02

Receptor Information

>1esb Chain A (length=240) Species: 9823 (Sus scrofa)

VVGGTEAQRNSWPSQISLQYRSGSSWAHTCGGTLIRQNWVMTAAHCVDRE
LTFRVVVGEHNLNQNNGTEQYVGVQKIVVHPYWNTDDVAAGYDIALLRLA
QSVTLNSYVQLGVLPRAGTILANNSPCYITGWGLTRTNGQLAQTLQQAYL
PTVDYAICSSSSYWGSTVKNSMVCAGGDGVRSGCQGDSGGPLHCLVNGQY
AVHGVTSFVSRLGCNVTRKPTVFTRVSAYISWINNVIASN

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: 1esb Chain A Residue 280

Receptor-Ligand Complex Structure

Structure summary

• PDB: 1esb Direct structural observation of an acyl-enzyme intermediate in the hydrolysis of an ester substrate by elastase.
• Resolution: 2.3 Å
• Binding residue (original residue number in PDB): E74 N76 Q79 N81 E84
• Binding residue (residue number reindexed from 1): E59 N61 Q64 N66 E69
• Annotation score: 4

Enzymatic activity

• Catalytic site (original residue number in PDB): H60 D108 Q200 G201 D202 S203 G204
• Catalytic site (residue number reindexed from 1): H45 D93 Q185 G186 D187 S188 G189
• Enzyme Commision number: 3.4.21.36: pancreatic elastase.

Gene Ontology

Molecular Function

• GO:0004252 serine-type endopeptidase activity
• GO:0005515 protein binding
• GO:0008236 serine-type peptidase activity
• GO:0046872 metal ion binding

Biological Process

• GO:0006508 proteolysis

Cellular Component

• GO:0005576 extracellular region
• GO:0005615 extracellular space

External links

• PDB: RCSB:1esb, PDBe:1esb, PDBj:1esb
• PDBsum: 1esb
• PubMed: 8049229
• UniProt: P00772|CELA1_PIG Chymotrypsin-like elastase family member 1 (Gene Name=CELA1)