Structure of PDB 2qn1 Chain A Binding Site BS01

Receptor Information
>2qn1 Chain A (length=813) Species: 9986 (Oryctolagus cuniculus) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
QISVRGLAGVENVTELKKNFNRHLHFTLVKDRNVATPRDYYFALAHTVRD
HLVGRWIRTQQHYYEKDPKRIYYLSLEFYMGRTLQNTMVNLALENACDEA
TYQLGLDMEELEEIEEDAGLGNGGLGRLAACFLDSMATLGLAAYGYGIRY
EFGIFNQKICGGWQMEEADDWLRYGNPWEKARPEFTLPVHFYGRVEHTSQ
GAKWVDTQVVLAMPYDTPVPGYRNNVVNTMRLWSAKAPNDFNLGYIQAVL
DRNLAENISRVLYPNDNFFEGKELRLKQEYFVVAATLQDIIRRFKSSKFG
TNFDAFPDKVAIQLNDTHPSLAIPELMRVLVDLERLDWDKAWEVTVKTCA
YTNHTVLPEALERWPVHLLETLLPRHLQIIYEINQRFLNRVAAAFPGDVD
RLRRMSLVEEGAVKRINMAHLCIAGSHAVNGVARIHSEILKKTIFKDFYE
LEPHKFQNKTNGITPRRWLVLCNPGLAEIIAERIGEEYISDLDQLRKLLS
YVDDEAFIRDVAKVKQENKLKFAAYLEREYKVHINPNSLFDVQVKRIHEY
KRQLLNCLHVITLYNRIKKEPNKFVVPRTVMIGGKAAPGYHMAKMIIKLI
TAIGDVVNHDPVVGDRLRVIFLENYRVSLAEKVIPAADLSEQISTAGTEA
SGTGNMKFMLNGALTIGTMDGANVEMAEEAGEENFFIFGMRVEDVDRLDQ
RGYNAQEYYDRIPELRQIIEQLSSGFFSPKQPDLFKDIVNMLMHHDRFKV
FADYEEYVKCQERVSALYKNPREWTRMVIRNIATSGKFSSDRTIAQYARE
IWGVEPSRQRLPA
Ligand information
Ligand ID0AS
InChIInChI=1S/C30H48O5/c1-17-9-12-30(25(34)35)14-13-28(5)19(23(30)18(17)2)7-8-22-26(3)15-20(32)24(33)27(4,16-31)21(26)10-11-29(22,28)6/h7,17-18,20-24,31-33H,8-16H2,1-6H3,(H,34,35)/t17-,18+,20-,21-,22-,23+,24+,26+,27+,28-,29-,30+/m1/s1
InChIKeyJXSVIVRDWWRQRT-UYDOISQJSA-N
SMILES
SoftwareSMILES
CACTVS 3.341C[CH]1CC[C]2(CC[C]3(C)C(=CC[CH]4[C]5(C)C[CH](O)[CH](O)[C](C)(CO)[CH]5CC[C]34C)[CH]2[CH]1C)C(O)=O
CACTVS 3.341C[C@@H]1CC[C@@]2(CC[C@]3(C)C(=CC[C@@H]4[C@@]5(C)C[C@@H](O)[C@H](O)[C@@](C)(CO)[C@@H]5CC[C@@]34C)[C@@H]2[C@H]1C)C(O)=O
ACDLabs 10.04O=C(O)C54C(C3=CCC1C(CCC2C1(C)CC(O)C(O)C2(C)CO)(C)C3(C)CC4)C(C)C(C)CC5
OpenEye OEToolkits 1.5.0C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(C[C@H]([C@@H]([C@@]5(C)CO)O)O)C)C)[C@@H]2[C@H]1C)C)C(=O)O
OpenEye OEToolkits 1.5.0CC1CCC2(CCC3(C(=CCC4C3(CCC5C4(CC(C(C5(C)CO)O)O)C)C)C2C1C)C)C(=O)O
FormulaC30 H48 O5
Nameasiatic acid;
(2alpha,3beta,5beta,20beta)-2,3,23-trihydroxyurs-12-en-28-oic acid
ChEMBLCHEMBL404313
DrugBankDB14054
ZINCZINC000008221271
PDB chain2qn1 Chain A Residue 930 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
Global viewLocal viewStructure summary

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PDB2qn1 Naturally occurring pentacyclic triterpenes as inhibitors of glycogen phosphorylase: synthesis, structure-activity relationships, and X-ray crystallographic studies
Resolution2.401 Å
Binding residue
(original residue number in PDB)		I68 Q71 Q72 R310
Binding residue
(residue number reindexed from 1)		I57 Q60 Q61 R293
Annotation score1
Binding affinityPDBbind-CN: -logKd/Ki=4.77,IC50=17uM
BindingDB: IC50=17000nM
Enzymatic activity
Catalytic site (original residue number in PDB) H377 K568 R569 K574 T676 K680
Catalytic site (residue number reindexed from 1) H354 K545 R546 K551 T653 K657
Enzyme Commision number 2.4.1.1: glycogen phosphorylase.
Gene Ontology
Molecular Function
GO:0000166 nucleotide binding
GO:0004645 1,4-alpha-oligoglucan phosphorylase activity
GO:0008184 glycogen phosphorylase activity
GO:0016757 glycosyltransferase activity
GO:0030170 pyridoxal phosphate binding
Biological Process
GO:0005975 carbohydrate metabolic process
GO:0005977 glycogen metabolic process
GO:0005980 glycogen catabolic process
Cellular Component
GO:0005737 cytoplasm
GO:0098723 skeletal muscle myofibril

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:2qn1, PDBe:2qn1, PDBj:2qn1
PDBsum2qn1
PubMed18517260
UniProtP00489|PYGM_RABIT Glycogen phosphorylase, muscle form (Gene Name=PYGM)

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