Structure of PDB 1rxc Chain K Binding Site BS02

Receptor Information
>1rxc Chain K (length=243) Species: 562 (Escherichia coli) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
SDVFHLGLTKNDLQGATLAIVPGDPDRVEKIAALMDKPVKLASHREFTTW
RAELDGKPVIVCSTGIGGPSTSIAVEELAQLGIRTFLRIGTTGAIQPHIN
VGDVLVTTASVRLDGASLHFAPLEFPAVADFECTTALVEAAKSIGATTHV
GVTASSDTFYPGQERYDTYSGRVVRHFKGSMEEWQAMGVMNYEMESATLL
TMCASQGLRAGMVAGVIVNRTQQEIPNASHAVKIVVEAARRLL
Ligand information
Ligand IDK
InChIInChI=1S/K/q+1
InChIKeyNPYPAHLBTDXSSS-UHFFFAOYSA-N
SMILES
SoftwareSMILES
ACDLabs 10.04
CACTVS 3.341
OpenEye OEToolkits 1.5.0		[K+]
FormulaK
NamePOTASSIUM ION
ChEMBLCHEMBL1233793
DrugBankDB01345
ZINC
PDB chain1rxc Chain K Residue 2105 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB1rxc Crystal structures of escherichia coli uridine phosphorylase in two native and three complexed forms reveal basis of substrate specificity, induced conformational changes and influence of potassium
Resolution2.35 Å
Binding residue
(original residue number in PDB)		E49 G68 I69 S73
Binding residue
(residue number reindexed from 1)		E46 G65 I66 S70
Annotation score1
Enzymatic activity
Catalytic site (original residue number in PDB) H8 G26 R30 R48 E80 R91 T94 R168 I220 V221 R223
Catalytic site (residue number reindexed from 1) H5 G23 R27 R45 E77 R88 T91 R165 I217 V218 R220
Enzyme Commision number 2.4.2.3: uridine phosphorylase.
Gene Ontology
Molecular Function
GO:0003824 catalytic activity
GO:0004850 uridine phosphorylase activity
GO:0005524 ATP binding
GO:0016757 glycosyltransferase activity
GO:0016763 pentosyltransferase activity
GO:0030955 potassium ion binding
GO:0042802 identical protein binding
GO:0047847 deoxyuridine phosphorylase activity
Biological Process
GO:0006218 uridine catabolic process
GO:0006974 DNA damage response
GO:0009116 nucleoside metabolic process
GO:0009164 nucleoside catabolic process
GO:0009166 nucleotide catabolic process
GO:0044206 UMP salvage
GO:0046050 UMP catabolic process
Cellular Component
GO:0005737 cytoplasm
GO:0005829 cytosol
GO:0032991 protein-containing complex

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Biological Process
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Cellular Component
External links
PDB RCSB:1rxc, PDBe:1rxc, PDBj:1rxc
PDBsum1rxc
PubMed15003451
UniProtP12758|UDP_ECOLI Uridine phosphorylase (Gene Name=udp)

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