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- PDB-1gpk: Structure of Acetylcholinesterase Complex with (+)-Huperzine A at... -

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Basic information

Entry
Database: PDB / ID: 1gpk
TitleStructure of Acetylcholinesterase Complex with (+)-Huperzine A at 2.1A Resolution
ComponentsACETYLCHOLINESTERASE
KeywordsHYDROLASE / CHOLINESTERASE / HUPERZINE A / ALZHEIMER'S DISEASE
Function / homology
Function and homology information


acetylcholine catabolic process in synaptic cleft / acetylcholinesterase / acetylcholinesterase activity / synaptic cleft / side of membrane / synapse / plasma membrane
Similarity search - Function
Acetylcholinesterase, fish/snake / Cholinesterase / Carboxylesterase type B, conserved site / Carboxylesterases type-B signature 2. / Carboxylesterase type B, active site / Carboxylesterases type-B serine active site. / Carboxylesterase, type B / Carboxylesterase family / Alpha/Beta hydrolase fold, catalytic domain / Alpha/Beta hydrolase fold ...Acetylcholinesterase, fish/snake / Cholinesterase / Carboxylesterase type B, conserved site / Carboxylesterases type-B signature 2. / Carboxylesterase type B, active site / Carboxylesterases type-B serine active site. / Carboxylesterase, type B / Carboxylesterase family / Alpha/Beta hydrolase fold, catalytic domain / Alpha/Beta hydrolase fold / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Huperzine A / Acetylcholinesterase
Similarity search - Component
Biological speciesTORPEDO CALIFORNICA (Pacific electric ray)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.1 Å
AuthorsDvir, H. / Harel, M. / Chetrit, M. / Silman, I. / Sussman, J.L.
CitationJournal: Biochemistry / Year: 2002
Title: X-Ray Structures of Torpedo Californica Acetylcholinesterase Complexed with (+)-Huperzine a and (-)-Huperzine B: Structural Evidence for an Active Site Rearrangement
Authors: Dvir, H. / Jiang, H.L. / Wong, D.M. / Harel, M. / Chetrit, M. / He, X.C. / Jin, G.Y. / Yu, G.L. / Tang, X.C. / Silman, I. / Bai, D.L. / Sussman, J.L.
History
DepositionNov 5, 2001Deposition site: PDBE / Processing site: PDBE
Revision 1.0Aug 29, 2002Provider: repository / Type: Initial release
Revision 1.1Oct 23, 2013Group: Advisory / Atomic model ...Advisory / Atomic model / Derived calculations / Non-polymer description / Other / Refinement description / Version format compliance
Revision 1.2Nov 29, 2017Group: Database references / Category: pdbx_database_related
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Derived calculations / Other / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / database_PDB_caveat / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_database_status / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_validate_chiral / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_entity_id / _chem_comp.name / _chem_comp.type / _pdbx_database_status.status_code_sf / _pdbx_entity_nonpoly.entity_id / _pdbx_entity_nonpoly.name / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_validate_chiral.auth_asym_id / _pdbx_validate_chiral.auth_seq_id / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1May 12, 2021Group: Derived calculations / Structure summary
Category: chem_comp / pdbx_struct_assembly ...chem_comp / pdbx_struct_assembly / pdbx_struct_assembly_gen / pdbx_struct_oper_list
Item: _chem_comp.pdbx_synonyms / _pdbx_struct_assembly.details ..._chem_comp.pdbx_synonyms / _pdbx_struct_assembly.details / _pdbx_struct_assembly.method_details / _pdbx_struct_assembly.oligomeric_count / _pdbx_struct_assembly.oligomeric_details
Revision 2.2Dec 13, 2023Group: Data collection / Database references / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: ACETYLCHOLINESTERASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)61,8465
Polymers60,7371
Non-polymers1,1094
Water9,530529
1
A: ACETYLCHOLINESTERASE
hetero molecules

A: ACETYLCHOLINESTERASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)123,2679
Polymers121,4732
Non-polymers1,7947
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation4_556y,x,-z+11
Unit cell
Length a, b, c (Å)111.421, 111.421, 137.145
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number152
Space group name H-MP3121

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Components

#1: Protein ACETYLCHOLINESTERASE / / ACHE


Mass: 60736.516 Da / Num. of mol.: 1 / Fragment: RESIDUES 22-558 / Source method: isolated from a natural source / Details: PURIFIED FROM THE ELECTRIC ORGAN
Source: (natural) TORPEDO CALIFORNICA (Pacific electric ray)
Organ: ELECTRIC ORGAN / Variant: G2 FORM / Tissue: ELECTROPLAQUE / References: UniProt: P04058, acetylcholinesterase
#2: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][a-D-GlcpNAc]{}}}LINUCSPDB-CARE
#3: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE / N-Acetylglucosamine


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
#4: Chemical ChemComp-HUP / Huperzine A / Huperzine A


Mass: 242.316 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C15H18N2O / Comment: alkaloid*YM
#5: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 529 / Source method: isolated from a natural source / Formula: H2O

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 3.8 Å3/Da / Density % sol: 66.6 % / Description: DATA WERE COLLECTED USING THE ROTATION METHOD
Crystal growpH: 5.8 / Details: pH 5.80
Crystal grow
*PLUS
Temperature: 4 ℃ / Method: vapor diffusion, hanging drop / Details: Raves, M.L., (1997) Nature Struct. Biol., 4, 57.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-ID
138 %PEG2001reservoir
20.1 MMES1reservoir
312 mg/mlprotein1drop

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: ID14-2 / Wavelength: 0.9326
DetectorType: BRUKER-AXS / Detector: CCD / Date: May 10, 2000
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9326 Å / Relative weight: 1
ReflectionResolution: 2.1→20 Å / Num. obs: 67270 / % possible obs: 98.8 % / Redundancy: 2.3 % / Rmerge(I) obs: 0.044 / Net I/σ(I): 15.2
Reflection shellResolution: 2.1→2.18 Å / Rmerge(I) obs: 0.4 / Mean I/σ(I) obs: 2 / % possible all: 99.9
Reflection
*PLUS
Lowest resolution: 20 Å / Num. all: 67270 / Num. obs: 57502 / Num. measured all: 677200
Reflection shell
*PLUS
% possible obs: 99.9 % / Rmerge(I) obs: 0.416

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Processing

Software
NameVersionClassification
CNS1.1refinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1EA5

1ea5


Resolution: 2.1→20 Å / Data cutoff high absF: 1000 / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.2135 2850 4.9 %RANDOM
Rwork0.1886 ---
obs0.1886 56565 97.8 %-
Refinement stepCycle: LAST / Resolution: 2.1→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4162 0 74 529 4765
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.0062
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg1.32
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it
X-RAY DIFFRACTIONc_mcangle_it
X-RAY DIFFRACTIONc_scbond_it
X-RAY DIFFRACTIONc_scangle_it
LS refinement shellResolution: 2.1→2.11 Å / Total num. of bins used: 50
RfactorNum. reflection% reflection
Rfree0.3655 57 2 %
Rwork0.338 1063 -
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER_REP.PARAMWATER.TOP
X-RAY DIFFRACTION3CARBOHYDRATE.PARAMCARBOHYDRATE.TOP
X-RAY DIFFRACTION4HUP.PARHUP.TOP
Refinement
*PLUS
Highest resolution: 2.1 Å / Lowest resolution: 20 Å / Rfactor Rfree: 0.214 / Rfactor Rwork: 0.189
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Type: c_bond_d / Dev ideal: 0.006

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