Structure of PDB 1bwn Chain B Binding Site BS03

Receptor Information

>1bwn Chain B (length=161) Species: 9606 (Homo sapiens)

AAVILESIFLKRSQQKKKTSPLNFKKRLFLLTVHKLSYYKYDFERGRRGS
KKGSIDVEKITCVETVVPEKNPPPERQIEMEQISIIERFPYPFQVVYDEG
PLYVFSPTEELRKRWIHQLKNVIRYNSDLVQKYHPCFWIDGQYLCCSQTA
KNAMGCQILEN

Ligand information

• Ligand ID: 4IP
• InChI: InChI=1S/C6H16O18P4/c7-1-3(21-25(9,10)11)2(8)5(23-27(15,16)17)6(24-28(18,19)20)4(1)22-26(12,13)14/h1-8H,(H2,9,10,11)(H2,12,13,14)(H2,15,16,17)(H2,18,19,20)/t1-,2-,3-,4+,5-,6-/m0/s1
• InChIKey: CIPFCGZLFXVXBG-CNWJWELYSA-N
• SMILES:
  ACDLabs 12.01: O=P(O)(O)OC1C(O)C(OP(=O)(O)O)C(O)C(OP(=O)(O)O)C1OP(=O)(O)O
  OpenEye OEToolkits 1.7.6: [C@H]1([C@H](C([C@H]([C@H](C1OP(=O)(O)O)O)OP(=O)(O)O)OP(=O)(O)O)OP(=O)(O)O)O
  CACTVS 3.385: O[CH]1[CH](O[P](O)(O)=O)[CH](O)[CH](O[P](O)(O)=O)[CH](O[P](O)(O)=O)[CH]1O[P](O)(O)=O
  OpenEye OEToolkits 1.7.6: C1(C(C(C(C(C1OP(=O)(O)O)OP(=O)(O)O)OP(=O)(O)O)O)OP(=O)(O)O)O
  CACTVS 3.385: O[C@H]1[C@@H](O[P](O)(O)=O)[C@H](O)[C@@H](O[P](O)(O)=O)[C@H](O[P](O)(O)=O)[C@H]1O[P](O)(O)=O
• Formula: C6 H16 O18 P4
• Name: INOSITOL-(1,3,4,5)-TETRAKISPHOSPHATE
• ChEMBL: CHEMBL23552
• DrugBank: DB01863
• ZINC: ZINC000012494830
• PDB chain: 1bwn Chain B Residue 172

Receptor-Ligand Complex Structure

Structure summary

• PDB: 1bwn Structure of the PH domain from Bruton's tyrosine kinase in complex with inositol 1,3,4,5-tetrakisphosphate.
• Resolution: 2.1 Å
• Binding residue (original residue number in PDB): K41 K53
• Binding residue (residue number reindexed from 1): K40 K52
• Annotation score: 1
• Binding affinity: MOAD: Kd=87nM
  PDBbind-CN: -logKd/Ki=7.06,Kd=87nM

Enzymatic activity

• Enzyme Commision number: 2.7.10.2: non-specific protein-tyrosine kinase.

Gene Ontology

Biological Process

• GO:0035556 intracellular signal transduction

External links

• PDB: RCSB:1bwn, PDBe:1bwn, PDBj:1bwn
• PDBsum: 1bwn
• PubMed: 10196129
• UniProt: Q06187|BTK_HUMAN Tyrosine-protein kinase BTK (Gene Name=BTK)