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- PDB-1n7j: The structure of Phenylethanolamine N-methyltransferase in comple... -

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Basic information

Entry
Database: PDB / ID: 1n7j
TitleThe structure of Phenylethanolamine N-methyltransferase in complex with S-adenosylhomocysteine and an iodinated inhibitor
ComponentsPhenylethanolamine N-methyltransferase
KeywordsTRANSFERASE / methyltransferase / catecholamine / adrenaline / epinephrine / s-adenosylmethionine / s-adenolsylhomocysteine
Function / homology
Function and homology information


phenylethanolamine N-methyltransferase / phenylethanolamine N-methyltransferase activity / epinephrine biosynthetic process / Catecholamine biosynthesis / catecholamine biosynthetic process / methylation / cytosol
Similarity search - Function
Methyltransferase, NNMT/PNMT/TEMT / Methyltransferase NNMT/PNMT/TEMT, conserved site / : / NNMT/PNMT/TEMT family / NNMT/PNMT/TEMT family of methyltransferases signature. / SAM-dependent methyltransferase NNMT/PNMT/TEMT-type profile. / Vaccinia Virus protein VP39 / S-adenosyl-L-methionine-dependent methyltransferase superfamily / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
7-IODO-1,2,3,4-TETRAHYDRO-ISOQUINOLINE / S-ADENOSYL-L-HOMOCYSTEINE / Phenylethanolamine N-methyltransferase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / difference fourier / Resolution: 2.7 Å
AuthorsMcMillan, F.M. / Archbold, J. / McLeish, M.J. / Caine, J.M. / Criscione, K.R. / Grunewald, G.L. / Martin, J.L.
CitationJournal: J.Med.Chem. / Year: 2004
Title: Molecular recognition of sub-micromolar inhibitors by the epinephrine-synthesizing enzyme phenylethanolamine N-methyltransferase.
Authors: McMillan, F.M. / Archbold, J. / McLeish, M.J. / Caine, J.M. / Criscione, K.R. / Grunewald, G.L. / Martin, J.L.
History
DepositionNov 15, 2002Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 23, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Feb 14, 2024Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Phenylethanolamine N-methyltransferase
B: Phenylethanolamine N-methyltransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)63,0636
Polymers61,7762
Non-polymers1,2874
Water1,00956
1
A: Phenylethanolamine N-methyltransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)31,5313
Polymers30,8881
Non-polymers6432
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
B: Phenylethanolamine N-methyltransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)31,5313
Polymers30,8881
Non-polymers6432
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)94.740, 94.740, 186.900
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number96
Space group name H-MP43212

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Components

#1: Protein Phenylethanolamine N-methyltransferase / PNMTase / Noradrenaline N-methyltransferase


Mass: 30887.982 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: PNMT OR PENT / Plasmid: pET17 / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3)
References: UniProt: P11086, phenylethanolamine N-methyltransferase
#2: Chemical ChemComp-SAH / S-ADENOSYL-L-HOMOCYSTEINE


Type: L-peptide linking / Mass: 384.411 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C14H20N6O5S
#3: Chemical ChemComp-IDI / 7-IODO-1,2,3,4-TETRAHYDRO-ISOQUINOLINE


Mass: 259.087 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C9H10IN
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 56 / 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: 3.53 Å3/Da / Density % sol: 64.86 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 6
Details: PEG 6K, lithium chloride, cacodylate , pH 6.0, VAPOR DIFFUSION, HANGING DROP, temperature 293K
Crystal grow
*PLUS
Temperature: 20 ℃ / Method: vapor diffusion, hanging drop / PH range low: 6.25 / PH range high: 6
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetailsChemical formula
111 mMdithiothreitol1drop
22 mMAdoHcy1drop
311 mM7-iodo-1,2,3,4-tetrahydroisoquinoline1drop
40.1 Mcacodylate1reservoirpH6-6.25
56-10 %PEG60001reservoir
60.25 M1reservoirLiCl
780 mg/mlprotein1drop

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU / Wavelength: 1.5418
DetectorType: RIGAKU RAXIS IIC / Detector: IMAGE PLATE / Date: Jul 28, 1997 / Details: yale mirrors
RadiationMonochromator: nickel filter / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.7→31.39 Å / Num. all: 22078 / Num. obs: 22078 / % possible obs: 91.3 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 2.36 % / Biso Wilson estimate: 37.3 Å2 / Rmerge(I) obs: 0.075 / Net I/σ(I): 11.1
Reflection shellResolution: 2.7→2.8 Å / Rmerge(I) obs: 0.279 / Mean I/σ(I) obs: 2.1 / % possible all: 77
Reflection
*PLUS
Highest resolution: 2.7 Å / Lowest resolution: 50 Å / Num. measured all: 52232
Reflection shell
*PLUS
% possible obs: 77 %

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Processing

Software
NameVersionClassificationNB
CNS1.1refinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
RefinementMethod to determine structure: difference fourier
Starting model: 1HNN

1hnn


Resolution: 2.7→31.39 Å / Rfactor Rfree error: 0.006 / Occupancy max: 1 / Occupancy min: 0.5 / Data cutoff high absF: 1521446.24 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.268 2192 9.9 %RANDOM
Rwork0.232 ---
obs0.232 22075 91.4 %-
all-22075 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 18.394 Å2 / ksol: 0.292118 e/Å3
Displacement parametersBiso mean: 46.3 Å2
Baniso -1Baniso -2Baniso -3
1-4.77 Å20 Å20 Å2
2--4.77 Å20 Å2
3----9.54 Å2
Refine Biso
ClassRefine-IDTreatment
polymerX-RAY DIFFRACTIONisotropic
waterX-RAY DIFFRACTIONisotropic
nonpolymerX-RAY DIFFRACTIONisotropic
Refine analyze
FreeObs
Luzzati coordinate error0.45 Å0.38 Å
Luzzati d res low-5 Å
Luzzati sigma a0.71 Å0.6 Å
Refinement stepCycle: LAST / Resolution: 2.7→31.39 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4065 0 74 56 4195
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.008
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_deg1.4
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d23.9
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d1
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it1.241.5
X-RAY DIFFRACTIONc_mcangle_it2.22
X-RAY DIFFRACTIONc_scbond_it1.722
X-RAY DIFFRACTIONc_scangle_it2.722.5
LS refinement shellResolution: 2.7→2.87 Å / Rfactor Rfree error: 0.022 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.402 333 10.4 %
Rwork0.375 2861 -
obs--81.2 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER_REP.PARAMWATER.TOP
X-RAY DIFFRACTION3IODO_JLM.PARIODO.TOP
X-RAY DIFFRACTION4SAH_MOD2.PARSAH_MOD.TOP
Software
*PLUS
Name: CNS / Classification: refinement
Refinement
*PLUS
Highest resolution: 2.7 Å / Lowest resolution: 50 Å / % reflection Rfree: 10 %
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_angle_deg1.4
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg23.9
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg1

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