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- PDB-6hpu: Crystal structure of human Pif1 helicase in complex with ADP-AlF4 -

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Basic information

Entry
Database: PDB / ID: 6hpu
TitleCrystal structure of human Pif1 helicase in complex with ADP-AlF4
ComponentsATP-dependent DNA helicase PIF1
KeywordsHYDROLASE / Pif1 / 5'-3' DNA helicase / Duplex Unwinding / Telomere Maintenance / DNA Repair
Function / homology
Function and homology information


5'-3' DNA/RNA helicase activity / telomerase inhibitor activity / G-quadruplex DNA binding / mitochondrial genome maintenance / : / regulation of telomere maintenance / DNA duplex unwinding / single-stranded DNA helicase activity / telomeric DNA binding / negative regulation of telomere maintenance via telomerase ...5'-3' DNA/RNA helicase activity / telomerase inhibitor activity / G-quadruplex DNA binding / mitochondrial genome maintenance / : / regulation of telomere maintenance / DNA duplex unwinding / single-stranded DNA helicase activity / telomeric DNA binding / negative regulation of telomere maintenance via telomerase / Telomere Extension By Telomerase / telomere maintenance via telomerase / replication fork / 5'-3' DNA helicase activity / DNA recombination / DNA replication / DNA helicase / chromosome, telomeric region / DNA repair / magnesium ion binding / ATP hydrolysis activity / mitochondrion / nucleoplasm / ATP binding
Similarity search - Function
Helicase / : / : / DNA helicase Pif1, 2B domain / DNA helicase Pif1-like / PIF1-like helicase / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
ADENOSINE-5'-DIPHOSPHATE / TETRAFLUOROALUMINATE ION / ATP-dependent DNA helicase PIF1
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3.96 Å
AuthorsLevdikov, V.M. / Dehghani-Tafti, S. / Bax, B.D. / Sanders, C.M. / Antson, A.A.
CitationJournal: Nucleic Acids Res. / Year: 2019
Title: Structural and functional analysis of the nucleotide and DNA binding activities of the human PIF1 helicase.
Authors: Dehghani-Tafti, S. / Levdikov, V. / Antson, A.A. / Bax, B. / Sanders, C.M.
History
DepositionSep 21, 2018Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jan 23, 2019Provider: repository / Type: Initial release
Revision 1.1Feb 13, 2019Group: Data collection / Database references / Category: citation / citation_author / pdbx_database_proc
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.year / _citation_author.identifier_ORCID / _citation_author.name
Revision 1.2Apr 17, 2019Group: Data collection / Database references / Category: citation / pdbx_database_proc
Item: _citation.journal_volume / _citation.page_first / _citation.page_last
Revision 1.3Jan 24, 2024Group: 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: ATP-dependent DNA helicase PIF1
B: ATP-dependent DNA helicase PIF1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)92,0768
Polymers90,9672
Non-polymers1,1096
Water00
1
A: ATP-dependent DNA helicase PIF1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)46,0384
Polymers45,4841
Non-polymers5543
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
2
B: ATP-dependent DNA helicase PIF1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)46,0384
Polymers45,4841
Non-polymers5543
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)209.850, 209.850, 78.885
Angle α, β, γ (deg.)90.00, 90.00, 120.00
Int Tables number154
Space group name H-MP3221

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Components

#1: Protein ATP-dependent DNA helicase PIF1 / DNA repair and recombination helicase PIF1 / PIF1/RRM3 DNA helicase-like protein


Mass: 45483.582 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Details: SRM - cloning artefact / Source: (gene. exp.) Homo sapiens (human) / Gene: PIF1, C15orf20 / Plasmid: pET / Details (production host): pET / Production host: Escherichia coli BL21(DE3) (bacteria) / References: UniProt: Q9H611, DNA helicase
#2: Chemical ChemComp-ADP / ADENOSINE-5'-DIPHOSPHATE


Mass: 427.201 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C10H15N5O10P2 / Comment: ADP, energy-carrying molecule*YM
#3: Chemical ChemComp-ALF / TETRAFLUOROALUMINATE ION


Mass: 102.975 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: AlF4
#4: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg

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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: 5.51 Å3/Da / Density % sol: 77.68 %
Crystal growTemperature: 274 K / Method: vapor diffusion, sitting drop / Details: MES, Ca-acetate, PEG 20K, PEG550 MME / PH range: 6-8

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: Diamond / Beamline: I04 / Wavelength: 0.92819 Å
DetectorType: DECTRIS PILATUS3 S 6M / Detector: PIXEL / Date: Dec 12, 2016
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.92819 Å / Relative weight: 1
ReflectionResolution: 3.96→104.93 Å / Num. obs: 17663 / % possible obs: 100 % / Redundancy: 12.3 % / Biso Wilson estimate: 151.7 Å2 / CC1/2: 1 / Rmerge(I) obs: 0.08 / Net I/σ(I): 17.1
Reflection shellResolution: 3.96→4.06 Å / Redundancy: 12.8 % / Rmerge(I) obs: 0.857 / Mean I/σ(I) obs: 2.9 / Num. unique obs: 1273 / CC1/2: 0.892 / % possible all: 100

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Processing

Software
NameVersionClassification
REFMAC5.8.0222refinement
xia2data reduction
xia2data scaling
MOLREPphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 6HPH
Resolution: 3.96→91.03 Å / Cor.coef. Fo:Fc: 0.945 / Cor.coef. Fo:Fc free: 0.926 / SU B: 37.623 / SU ML: 0.487 / Cross valid method: THROUGHOUT / ESU R Free: 0.638 / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.25252 794 4.6 %RANDOM
Rwork0.17527 ---
obs0.17851 16607 98.75 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å
Displacement parametersBiso mean: 151.675 Å2
Baniso -1Baniso -2Baniso -3
1--5.5 Å2-2.75 Å2-0 Å2
2---5.5 Å20 Å2
3---17.84 Å2
Refinement stepCycle: 1 / Resolution: 3.96→91.03 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6359 0 66 0 6425
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.010.0146610
X-RAY DIFFRACTIONr_bond_other_d0.0010.0176048
X-RAY DIFFRACTIONr_angle_refined_deg1.5581.6668972
X-RAY DIFFRACTIONr_angle_other_deg0.8271.6314195
X-RAY DIFFRACTIONr_dihedral_angle_1_deg10.0225854
X-RAY DIFFRACTIONr_dihedral_angle_2_deg36.46920.085353
X-RAY DIFFRACTIONr_dihedral_angle_3_deg22.319151147
X-RAY DIFFRACTIONr_dihedral_angle_4_deg18.5781572
X-RAY DIFFRACTIONr_chiral_restr0.0660.2855
X-RAY DIFFRACTIONr_gen_planes_refined0.0060.027511
X-RAY DIFFRACTIONr_gen_planes_other0.0020.021159
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it13.90515.5393356
X-RAY DIFFRACTIONr_mcbond_other13.90415.5383355
X-RAY DIFFRACTIONr_mcangle_it21.39423.2434197
X-RAY DIFFRACTIONr_mcangle_other21.39323.2454198
X-RAY DIFFRACTIONr_scbond_it13.5916.1273252
X-RAY DIFFRACTIONr_scbond_other13.57816.1333249
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other21.07523.894759
X-RAY DIFFRACTIONr_long_range_B_refined31.39726391
X-RAY DIFFRACTIONr_long_range_B_other31.39426389
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 3.96→4.063 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.395 85 -
Rwork0.333 1134 -
obs--96.06 %

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