Structure of PDB 4r18 Chain K Binding Site BS02

Receptor Information

>4r18 Chain K (length=211) Species: 559292 (Saccharomyces cerevisiae S288C)

TTLAFRFQGGIIVAVDSRATAGNWVASQTVKKVIEINPFLLGTMAGGAAD
CQFWETWLGSQCRLHELREKERISVAAASKILSNLVYQYKGAGLSMGTMI
CGYTRKEGPTIYYVDSDGTRLKGDIFCVGSGQTFAYGVLDSNYKWDLSVE
DALYLGKRSILAAAHRDAYSGGSVNLYHVTEDGWIYHGNHDVGELFWKVK
EEEGSFNNVIG

Ligand information

• Ligand ID: MG
• InChI: InChI=1S/Mg/q+2
• InChIKey: JLVVSXFLKOJNIY-UHFFFAOYSA-N
• SMILES:
  ACDLabs 10.04
  OpenEye OEToolkits 1.5.0: [Mg+2]
  CACTVS 3.341: [Mg++]
• Formula: Mg
• Name: MAGNESIUM ION
• DrugBank: DB01378
• PDB chain: 4r18 Chain K Residue 302

Receptor-Ligand Complex Structure

Structure summary

• PDB: 4r18 Selective inhibition of the immunoproteasome by ligand-induced crosslinking of the active site.
• Resolution: 2.4 Å
• Binding residue (original residue number in PDB): A165 D168 A169 S171
• Binding residue (residue number reindexed from 1): A164 D167 A168 S170
• Annotation score: 4

Enzymatic activity

• Catalytic site (original residue number in PDB): D17 R19 K33 G47 S131 D168 S171
• Catalytic site (residue number reindexed from 1): D16 R18 K32 G46 S130 D167 S170
• Enzyme Commision number: 3.4.25.1: proteasome endopeptidase complex.

Gene Ontology

Molecular Function

• GO:0004298 threonine-type endopeptidase activity

Biological Process

• GO:0051603 proteolysis involved in protein catabolic process

Cellular Component

• GO:0005839 proteasome core complex

External links

• PDB: RCSB:4r18, PDBe:4r18, PDBj:4r18
• PDBsum: 4r18
• PubMed: 25244435
• UniProt: P30656|PSB5_YEAST Proteasome subunit beta type-5 (Gene Name=PRE2)