Structure of PDB 3ex3 Chain B

Receptor sequence
>3ex3B (length=257) Species: 9606 (Homo sapiens) [Search protein sequence]
MELSFGARAELPRIHPVASKLLRLMQKKETNLCLSADVSLARELLQLADA
LGPSICMLKTHVDILNDFTLDVMKELITLAKCHEFLIFEDRKFADIGNTV
KKQYEGGIFKIASWADLVNAHVVPGSGVVKGLQEVGLPLHRGCLLIAEMS
STGSLATGDYTRAAVRMAEEHSEFVVGFISGSRVSMKPEFLHLTPGVQLE
AGGDNLGQQYNSPQEVIGKRGSDIIIVGRGIISAADRLEAAEMYRKAAWE
AYLSRLG
3D structure
PDB3ex3 Lys314 is a nucleophile in non-classical reactions of orotidine-5'-monophosphate decarboxylase
ChainB
Resolution1.45 Å
3D
structure
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Enzymatic activity
Enzyme Commision number 2.4.2.10: orotate phosphoribosyltransferase.
4.1.1.23: orotidine-5'-phosphate decarboxylase.
Interaction with ligand
Site
#		 Ligand Ligand
chain		 Binding residues on receptor
(original residue number in PDB)		 Binding residues on receptor
(residue number reindexed from 1)		 Binding affinity
BS01 U5P B D317 I318 T321 D95 I96 T99 PDBbind-CN: -logKd/Ki=4.44,IC50=36uM
BS02 U5P B S257 D259 K281 H283 K314 M371 S372 P417 Q430 Y432 G450 R451 S35 D37 K59 H61 K92 M149 S150 P195 Q208 Y210 G228 R229 PDBbind-CN: -logKd/Ki=4.44,IC50=36uM
Gene Ontology
Molecular Function
GO:0004590 orotidine-5'-phosphate decarboxylase activity
Biological Process
GO:0006207 'de novo' pyrimidine nucleobase biosynthetic process
GO:0044205 'de novo' UMP biosynthetic process

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Molecular Function
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Biological Process
External links
PDB RCSB:3ex3, PDBe:3ex3, PDBj:3ex3
PDBsum3ex3
PubMed19472232
UniProtP11172|UMPS_HUMAN Uridine 5'-monophosphate synthase (Gene Name=UMPS)

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