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- PDB-1m73: CRYSTAL STRUCTURE OF HUMAN PNP AT 2.3A RESOLUTION -

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Basic information

Entry
Database: PDB / ID: 1m73
TitleCRYSTAL STRUCTURE OF HUMAN PNP AT 2.3A RESOLUTION
ComponentsPURINE NUCLEOSIDE PHOSPHORYLASE
KeywordsTRANSFERASE / Purine Nucleoside Phosphorylase / drug design / synchrotron
Function / homology
Function and homology information


nicotinamide riboside catabolic process / Defective PNP disrupts phosphorolysis of (deoxy)guanosine and (deoxy)inosine / purine-containing compound salvage / deoxyinosine catabolic process / purine nucleobase binding / nucleotide biosynthetic process / deoxyadenosine catabolic process / dAMP catabolic process / inosine catabolic process / urate biosynthetic process ...nicotinamide riboside catabolic process / Defective PNP disrupts phosphorolysis of (deoxy)guanosine and (deoxy)inosine / purine-containing compound salvage / deoxyinosine catabolic process / purine nucleobase binding / nucleotide biosynthetic process / deoxyadenosine catabolic process / dAMP catabolic process / inosine catabolic process / urate biosynthetic process / IMP catabolic process / Ribavirin ADME / guanosine phosphorylase activity / nucleoside binding / Purine salvage / Purine catabolism / allantoin metabolic process / purine-nucleoside phosphorylase / purine-nucleoside phosphorylase activity / positive regulation of alpha-beta T cell differentiation / nucleobase-containing compound metabolic process / purine ribonucleoside salvage / phosphate ion binding / positive regulation of T cell proliferation / positive regulation of interleukin-2 production / secretory granule lumen / ficolin-1-rich granule lumen / immune response / response to xenobiotic stimulus / Neutrophil degranulation / extracellular exosome / extracellular region / identical protein binding / cytoplasm / cytosol
Similarity search - Function
Purine nucleoside phosphorylase I, inosine/guanosine-specific / Purine phosphorylase, family 2, conserved site / Purine and other phosphorylases family 2 signature. / Purine nucleoside phosphorylase / Nucleoside phosphorylase domain / Nucleoside phosphorylase domain / Phosphorylase superfamily / Nucleoside phosphorylase superfamily / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Purine nucleoside phosphorylase
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.3 Å
AuthorsDe Azevedo Jr., W.F. / Marangoni Dos Santos, D. / Canduri, F. / Santos, G.C. / Olivieri, J.R. / Silva, R.G. / Basso, L.A. / Palma, M.S. / Santos, D.S.
Citation
#1: Journal: Proc.Natl.Acad.Sci.USA / Year: 1991
Title: Application of Crystallographic and Modeling Methods in the Design of Purine Nucleoside Phosphorylase Inhibitors
Authors: Ealick, S.E. / Babu, Y.S. / Bugg, C.E. / Erion, M.D. / Guida, W.C. / Montgomery, J.A. / Secrist, J.A.3rd.
History
DepositionJul 18, 2002Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Sep 16, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.3Oct 25, 2023Group: 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
E: PURINE NUCLEOSIDE PHOSPHORYLASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)32,3424
Polymers32,0541
Non-polymers2883
Water1,22568
1
E: PURINE NUCLEOSIDE PHOSPHORYLASE
hetero molecules

E: PURINE NUCLEOSIDE PHOSPHORYLASE
hetero molecules

E: PURINE NUCLEOSIDE PHOSPHORYLASE
hetero molecules


Theoretical massNumber of molelcules
Total (without water)97,02612
Polymers96,1613
Non-polymers8659
Water543
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_655-y+1,x-y,z1
crystal symmetry operation3_665-x+y+1,-x+1,z1
Buried area8770 Å2
ΔGint-180 kcal/mol
Surface area31660 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)141.630, 141.630, 163.160
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number155
Space group name H-MH32

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Components

#1: Protein PURINE NUCLEOSIDE PHOSPHORYLASE / Inosine phosphorylase / PNP


Mass: 32053.682 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Plasmid: pET-23A+ / Production host: Escherichia coli (E. coli)
References: UniProt: P00491, purine-nucleoside phosphorylase
#2: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: SO4
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 68 / 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: 4.92 Å3/Da / Density % sol: 75 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 5.3
Details: 0.05M citrate buffer, 19% ammonium sulphate, pH 5.3, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal grow
*PLUS
Temperature: 25 ℃ / pH: 7.1 / Method: vapor diffusion, hanging drop
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetails
112 mg/mlprotein1drop
210 mMpotassium phosphate1droppH7.1
319 %satammonium sulfate1reservoir
40.05 Mcitrate1reservoirpH5.3

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Data collection

DiffractionMean temperature: 104 K
Diffraction sourceSource: SYNCHROTRON / Site: LNLS / Beamline: D03B-MX1 / Wavelength: 1.4538 / Wavelength: 1.4538 Å
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Date: Jun 19, 2002
RadiationMonochromator: GRAPHITE / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.4538 Å / Relative weight: 1
ReflectionResolution: 2.3→24.25 Å / Num. all: 26429 / Num. obs: 26429 / % possible obs: 94.13 % / Observed criterion σ(F): 2 / Observed criterion σ(I): 2 / Redundancy: 1.842 % / Rmerge(I) obs: 0.087
Reflection shellResolution: 2.3→2.4 Å / Rmerge(I) obs: 0.197 / % possible all: 87.6
Reflection
*PLUS
Highest resolution: 2.3 Å / Lowest resolution: 20.25 Å / Num. measured all: 48682
Reflection shell
*PLUS
Highest resolution: 2.3 Å / Lowest resolution: 2.4 Å / % possible obs: 87.6 %

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Processing

Software
NameClassification
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
X-PLORrefinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1ULA

1ula


Resolution: 2.3→8 Å / Data cutoff high absF: 2 / Data cutoff low absF: 2 / Cross valid method: THROUGHOUT / σ(F): 2 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.222 2588 10 %RANDOM
Rwork0.205 ---
all0.259 25740 --
obs0.239 25740 87.6 %-
Displacement parametersBiso mean: 16.75 Å2
Refine analyzeLuzzati coordinate error obs: 0.26 Å / Luzzati d res low obs: 8 Å
Refinement stepCycle: LAST / Resolution: 2.3→8 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms2251 0 15 68 2334
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.009
X-RAY DIFFRACTIONx_angle_deg1.48
X-RAY DIFFRACTIONx_dihedral_angle_d25.18
X-RAY DIFFRACTIONx_improper_angle_d1.332
Refinement
*PLUS
Lowest resolution: 8 Å
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg25.18
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_deg1.332

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