Structure of PDB 1nqh Chain A Binding Site BS01

Receptor Information
>1nqh Chain A (length=584) Species: 562 (Escherichia coli) [Search protein sequence] [Download receptor structure] [Download structure with residue number starting from 1] [View receptor structure]
DTLVVTANRFEQPRSTVLAPTTVVTRQDIDRWQSTSVNDVLRRLPGVDIT
QNGGSGQLSSIFIRGTNASHVLVLIDGVRLNLAGVSGSADLSQFPIALVQ
RVEYIRGPRSAVYGSDAIGGVVNIITTRDEPGTEISAGWGSNSYQNYDVS
TQQQLGDKTRVTLLGDYAHTHGYDVVAYGNTGTQAQTDNDGFLSKTLYGA
LEHNFTDAWSGFVRGYGYDNRTNYDAYYSPGSPLLDTRKLYSQSWDAGLR
YNGELIKSQLITSYSHSKDYNYDPHYGRYDSSATLDEMKQYTVQWANNVI
VGHGSIGAGVDWQKQTTTPEDGYDQRNTGIYLTGLQQVGDFTFEGAARSD
DNSQFGRHGTWQTSAGWEFIEGYRFIASYGTSYKAPNLGQLYGFYGNPNL
DPEKSKQWEGAFEGLTAGVNWRISGYRNDVSDLIDYDDHTLKYYNEGKAR
IKGVEATANFDTGPLTHTVSYDYVDARNAITDTPLLRRAKQQVKYQLDWQ
LYDFDWGITYQYLGTRYDKDYSSYPYQTVKMGGVSLWDLAVAYPVTSHLT
VRGKIANLFDKDYETVYGYQTAGREYTLSGSYTF
Ligand information
Ligand IDCA
InChIInChI=1S/Ca/q+2
InChIKeyBHPQYMZQTOCNFJ-UHFFFAOYSA-N
SMILES
SoftwareSMILES
CACTVS 3.341[Ca++]
ACDLabs 10.04
OpenEye OEToolkits 1.5.0		[Ca+2]
FormulaCa
NameCALCIUM ION
ChEMBL
DrugBankDB14577
ZINC
PDB chain1nqh Chain A Residue 595 [Download ligand structure] [Download structure with residue number starting from 1] [View ligand structure]
Receptor-Ligand Complex Structure
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PDB1nqh Substrate-induced transmembrane signaling in the cobalamin transporter BtuB
Resolution3.1 Å
Binding residue
(original residue number in PDB)		D179 Q191 D193 D195 D230
Binding residue
(residue number reindexed from 1)		D174 Q186 D188 D190 D225
Annotation score1
Enzymatic activity
Enzyme Commision number ?
Gene Ontology
Molecular Function
GO:0005509 calcium ion binding
GO:0005515 protein binding
GO:0015288 porin activity
GO:0015420 ABC-type vitamin B12 transporter activity
GO:0019904 protein domain specific binding
GO:0046872 metal ion binding
GO:0090482 vitamin transmembrane transporter activity
Biological Process
GO:0006811 monoatomic ion transport
GO:0015889 cobalamin transport
GO:0034220 monoatomic ion transmembrane transport
GO:0035461 vitamin transmembrane transport
Cellular Component
GO:0009279 cell outer membrane
GO:0016020 membrane
GO:0046930 pore complex
GO:1902495 transmembrane transporter complex

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Molecular Function
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Biological Process
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Cellular Component
External links
PDB RCSB:1nqh, PDBe:1nqh, PDBj:1nqh
PDBsum1nqh
PubMed12652322
UniProtP06129|BTUB_ECOLI Vitamin B12 transporter BtuB (Gene Name=btuB)

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