Structure of PDB 1rg9 Chain B Binding Site BS01

Receptor Information
>1rg9 Chain B (length=383) Species: 562 (Escherichia coli) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
AKHLFTSESVSEGHPDKIADQISDAVLDAILEQDPKARVACETYVKTGMV
LVGGEITTSAWVDIEEITRNTVREIGYVHSDMGFDANSCAVLSAIGKQSP
DINQGVDRADPLEQGAGDQGLMFGYATNETDVLMPAPITYAHRLVQRQAE
VRKNGTLPWLRPDAKSQVTFQYDDGKIVGIDAVVLSTQHSEEIDQKSLQE
AVMEEIIKPILPAEWLTSATKFFINPTGRFVIGGPMGDCGLTGRKIIVDT
YGGMARHGGGAFSGKDPSKVDRSAAYAARYVAKNIVAAGLADRCEIQVSY
AIGVAEPTSIMVETFGTEKVPSEQLTLLVREFFDLRPYGLIQMLDLLHPI
YKETAAYGHFGREHFPWEKTDKAQLLRDAAGLK
Ligand information
Ligand IDSAM
InChIInChI=1S/C15H22N6O5S/c1-27(3-2-7(16)15(24)25)4-8-10(22)11(23)14(26-8)21-6-20-9-12(17)18-5-19-13(9)21/h5-8,10-11,14,22-23H,2-4,16H2,1H3,(H2-,17,18,19,24,25)/t7-,8+,10+,11+,14+,27-/m0/s1
InChIKeyMEFKEPWMEQBLKI-FCKMPRQPSA-N
SMILES
SoftwareSMILES
CACTVS 3.341C[S@@+](CC[C@H](N)C([O-])=O)C[C@H]1O[C@H]([C@H](O)[C@@H]1O)n2cnc3c(N)ncnc23
OpenEye OEToolkits 1.5.0C[S+](CCC(C(=O)[O-])N)CC1C(C(C(O1)n2cnc3c2ncnc3N)O)O
CACTVS 3.341C[S+](CC[CH](N)C([O-])=O)C[CH]1O[CH]([CH](O)[CH]1O)n2cnc3c(N)ncnc23
OpenEye OEToolkits 1.5.0C[S@@+](CC[C@@H](C(=O)[O-])N)C[C@@H]1[C@H]([C@H]([C@@H](O1)n2cnc3c2ncnc3N)O)O
ACDLabs 10.04[O-]C(=O)C(N)CC[S+](C)CC3OC(n2cnc1c(ncnc12)N)C(O)C3O
FormulaC15 H22 N6 O5 S
NameS-ADENOSYLMETHIONINE
ChEMBLCHEMBL1235831
DrugBank
ZINC
PDB chain1rg9 Chain A Residue 385 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB1rg9 Crystal structure of the S-adenosylmethionine synthetase ternary complex: a novel catalytic mechanism of s-adenosylmethionine synthesis from ATP and MET.
Resolution2.5 Å
Binding residue
(original residue number in PDB)		E55 Q98 I102 D118 I302
Binding residue
(residue number reindexed from 1)		E55 Q98 I102 D118 I302
Annotation score5
Enzymatic activity
Catalytic site (original residue number in PDB) H14 D16 K17 E42 E55 K165 F230 D238 C239 R244 K245 K265 K269 D271
Catalytic site (residue number reindexed from 1) H14 D16 K17 E42 E55 K165 F230 D238 C239 R244 K245 K265 K269 D271
Enzyme Commision number 2.5.1.6: methionine adenosyltransferase.
Gene Ontology
Molecular Function
GO:0000287 magnesium ion binding
GO:0004478 methionine adenosyltransferase activity
GO:0005515 protein binding
GO:0005524 ATP binding
GO:0016740 transferase activity
GO:0030955 potassium ion binding
GO:0042802 identical protein binding
GO:0046872 metal ion binding
Biological Process
GO:0006556 S-adenosylmethionine biosynthetic process
GO:0006730 one-carbon metabolic process
GO:0033353 S-adenosylmethionine cycle
Cellular Component
GO:0005737 cytoplasm
GO:0005829 cytosol

View graph for
Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:1rg9, PDBe:1rg9, PDBj:1rg9
PDBsum1rg9
PubMed14967023
UniProtP0A817|METK_ECOLI S-adenosylmethionine synthase (Gene Name=metK)

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