Structure of PDB 1btn Chain A Binding Site BS01

Receptor Information

>1btn Chain A (length=106) Species: 10090 (Mus musculus)

MEGFLNRKHEWEAHNKKASSRSWHNVYCVINNQEMGFYKDAKSAASGIPY
HSEVPVSLKEAICEVALDYKKKKHVFKLRLSDGNEYLFQAKDDEEMNTWI
QAISSA

Ligand information

• Ligand ID: I3P
• InChI: InChI=1S/C6H15O15P3/c7-1-2(8)5(20-23(13,14)15)6(21-24(16,17)18)3(9)4(1)19-22(10,11)12/h1-9H,(H2,10,11,12)(H2,13,14,15)(H2,16,17,18)/t1-,2+,3+,4-,5-,6-/m1/s1
• InChIKey: MMWCIQZXVOZEGG-XJTPDSDZSA-N
• SMILES:
  ACDLabs 10.04: O=P(OC1C(O)C(O)C(OP(=O)(O)O)C(O)C1OP(=O)(O)O)(O)O
  OpenEye OEToolkits 1.5.0: C1(C(C(C(C(C1OP(=O)(O)O)O)OP(=O)(O)O)OP(=O)(O)O)O)O
  CACTVS 3.341: O[CH]1[CH](O)[CH](O[P](O)(O)=O)[CH](O[P](O)(O)=O)[CH](O)[CH]1O[P](O)(O)=O
  OpenEye OEToolkits 1.5.0: [C@H]1([C@@H]([C@H]([C@@H]([C@H]([C@@H]1OP(=O)(O)O)O)OP(=O)(O)O)OP(=O)(O)O)O)O
  CACTVS 3.341: O[C@@H]1[C@H](O)[C@@H](O[P](O)(O)=O)[C@H](O[P](O)(O)=O)[C@@H](O)[C@@H]1O[P](O)(O)=O
• Formula: C6 H15 O15 P3
• Name: D-MYO-INOSITOL-1,4,5-TRIPHOSPHATE
• ChEMBL: CHEMBL279107
• DrugBank: DB03401
• ZINC: ZINC000004095598
• PDB chain: 1btn Chain A Residue 107

Receptor-Ligand Complex Structure

Structure summary

• PDB: 1btn Structure of the binding site for inositol phosphates in a PH domain.
• Resolution: 2.0 Å
• Binding residue (original residue number in PDB): K8 R21 S22 W23 Y69 K71
• Binding residue (residue number reindexed from 1): K8 R21 S22 W23 Y69 K71
• Annotation score: 4
• Binding affinity: MOAD: Kd=40uM
  PDBbind-CN: -logKd/Ki=4.40,Kd=40uM

Gene Ontology

Molecular Function

• GO:0005543 phospholipid binding

External links

• PDB: RCSB:1btn, PDBe:1btn, PDBj:1btn
• PDBsum: 1btn
• PubMed: 7588597
• UniProt: Q62261|SPTB2_MOUSE Spectrin beta chain, non-erythrocytic 1 (Gene Name=Sptbn1)