Structure of PDB 1a99 Chain C Binding Site BS01

Receptor Information
>1a99 Chain C (length=341) Species: 562 (Escherichia coli) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
QKTLHIYNWSDYIAPDTVANFEKETGIKVVYDVFDSNEVLEGKLMAGSTG
FDLVVPSASFLERQLTAGVFQPLDKSKLPEWKNLDPELLKLVAKHDPDNK
FAMPYMWATTGIGYNVDKVKAVLGENAPVDSWDLILKPENLEKLKSCGVS
FLDAPEEVFATVLNYLGKDPNSTKADDYTGPATDLLLKLRPNIRYFHSSQ
YINDLANGDICVAIGWAGDVWQASNRAKEAKNGVNVSFSIPKEGAMAFFD
VFAMPADAKNKDEAYQFLNYLLRPDVVAHISDHVFYANANKAATPLVSAE
VRENPGIYPPADVRAKLFTLKVQDPKIDRVRTRAWTKVKSG
Ligand information
Ligand IDPUT
InChIInChI=1S/C4H12N2/c5-3-1-2-4-6/h1-6H2
InChIKeyKIDHWZJUCRJVML-UHFFFAOYSA-N
SMILES
SoftwareSMILES
OpenEye OEToolkits 1.5.0C(CCN)CN
ACDLabs 10.04
CACTVS 3.341		NCCCCN
FormulaC4 H12 N2
Name1,4-DIAMINOBUTANE;
PUTRESCINE
ChEMBLCHEMBL46257
DrugBankDB01917
ZINCZINC000005828633
PDB chain1a99 Chain C Residue 371 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB1a99 Crystal structure and mutational analysis of the Escherichia coli putrescine receptor. Structural basis for substrate specificity.
Resolution2.2 Å
Binding residue
(original residue number in PDB)		W37 S38 Y40 W244 F276 D278
Binding residue
(residue number reindexed from 1)		W9 S10 Y12 W216 F248 D250
Annotation score1
Binding affinityMOAD: Kd=2uM
Enzymatic activity
Enzyme Commision number ?
Gene Ontology
Molecular Function
GO:0019808 polyamine binding
GO:0019810 putrescine binding
Biological Process
GO:0015846 polyamine transport
GO:0015847 putrescine transport
Cellular Component
GO:0016020 membrane
GO:0030288 outer membrane-bounded periplasmic space
GO:0042597 periplasmic space
GO:0055052 ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:1a99, PDBe:1a99, PDBj:1a99
PDBsum1a99
PubMed9651355
UniProtP31133|POTF_ECOLI Putrescine-binding periplasmic protein PotF (Gene Name=potF)

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