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4U14

Structure of the M3 muscarinic acetylcholine receptor bound to the antagonist tiotropium crystallized with disulfide-stabilized T4 lysozyme (dsT4L)

Functional Information from GO Data
ChainGOidnamespacecontents
A0003796molecular_functionlysozyme activity
A0003824molecular_functioncatalytic activity
A0004930molecular_functionG protein-coupled receptor activity
A0007186biological_processG protein-coupled receptor signaling pathway
A0009253biological_processpeptidoglycan catabolic process
A0016020cellular_componentmembrane
A0016787molecular_functionhydrolase activity
A0016798molecular_functionhydrolase activity, acting on glycosyl bonds
A0016998biological_processcell wall macromolecule catabolic process
A0030430cellular_componenthost cell cytoplasm
A0031640biological_processkilling of cells of another organism
A0042742biological_processdefense response to bacterium
A0044659biological_processviral release from host cell by cytolysis
Functional Information from PDB Data
site_idAC1
Number of Residues11
Detailsbinding site for residue 0HK A 2000
ChainResidue
AASP147
ATYR529
ACYS532
ATYR148
ASER151
ATRP199
ALEU225
ATHR231
ATRP503
ATYR506
AASN507

Functional Information from PROSITE/UniProt
site_idPS00237
Number of Residues17
DetailsG_PROTEIN_RECEP_F1_1 G-protein coupled receptors family 1 signature. ASVmNLLVISFDRYFsI
ChainResidueDetails
AALA153-ILE169

Functional Information from SwissProt/UniProt
site_idSWS_FT_FI1
Number of Residues1
DetailsActive site: {"description":"Proton donor/acceptor","evidences":[{"source":"HAMAP-Rule","id":"MF_04110","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"3382407","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"7831309","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"8266098","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI2
Number of Residues1
DetailsActive site: {"description":"Proton donor/acceptor","evidences":[{"source":"HAMAP-Rule","id":"MF_04110","evidenceCode":"ECO:0000255"},{"source":"PubMed","id":"1892846","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"3382407","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"7831309","evidenceCode":"ECO:0000269"},{"source":"PubMed","id":"8266098","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI3
Number of Residues2
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"8266098","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI4
Number of Residues2
DetailsBinding site: {"evidences":[{"source":"PubMed","id":"7831309","evidenceCode":"ECO:0000303"}]}
ChainResidueDetails

site_idSWS_FT_FI5
Number of Residues23
DetailsTransmembrane: {"description":"Helical; Name=1"}
ChainResidueDetails

site_idSWS_FT_FI6
Number of Residues31
DetailsTopological domain: {"description":"Cytoplasmic","evidences":[{"source":"PubMed","id":"22358844","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI7
Number of Residues25
DetailsTransmembrane: {"description":"Helical; Name=2"}
ChainResidueDetails

site_idSWS_FT_FI8
Number of Residues44
DetailsTopological domain: {"description":"Extracellular","evidences":[{"source":"PubMed","id":"22358844","evidenceCode":"ECO:0000269"}]}
ChainResidueDetails

site_idSWS_FT_FI9
Number of Residues21
DetailsTransmembrane: {"description":"Helical; Name=3"}
ChainResidueDetails

site_idSWS_FT_FI10
Number of Residues21
DetailsTransmembrane: {"description":"Helical; Name=4"}
ChainResidueDetails

site_idSWS_FT_FI11
Number of Residues22
DetailsTransmembrane: {"description":"Helical; Name=5"}
ChainResidueDetails

site_idSWS_FT_FI12
Number of Residues22
DetailsTransmembrane: {"description":"Helical; Name=6"}
ChainResidueDetails

site_idSWS_FT_FI13
Number of Residues19
DetailsTransmembrane: {"description":"Helical; Name=7"}
ChainResidueDetails

site_idSWS_FT_FI14
Number of Residues1
DetailsModified residue: {"description":"Phosphoserine","evidences":[{"source":"UniProtKB","id":"Q9ERZ3","evidenceCode":"ECO:0000250"}]}
ChainResidueDetails

Catalytic Information from CSA
site_idMCSA1
Number of Residues2
DetailsM-CSA 921
ChainResidueDetails
AGLU1011proton shuttle (general acid/base)
AASP1020covalent catalysis

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PDB entries from 2025-12-17

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