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- PDB-1l1q: Crystal Structure of APRTase from Giardia lamblia Complexed with ... -

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Basic information

Entry
Database: PDB / ID: 1l1q
TitleCrystal Structure of APRTase from Giardia lamblia Complexed with 9-deazaadenine
ComponentsAdenine phosphoribosyltransferase
KeywordsTRANSFERASE / adenine / APRTase / Giardia lamblia / purine metabolism / catalytic loop
Function / homology
Function and homology information


adenine binding / adenine salvage / adenine phosphoribosyltransferase / adenine phosphoribosyltransferase activity / AMP salvage / purine ribonucleoside salvage / AMP binding / cytoplasm
Similarity search - Function
: / Rossmann fold - #2020 / Phosphoribosyl transferase domain / Phosphoribosyltransferase-like / Phosphoribosyltransferase domain / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
9-DEAZAADENINE / adenine phosphoribosyltransferase
Similarity search - Component
Biological speciesGiardia intestinalis (eukaryote)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.85 Å
AuthorsShi, W. / Sarver, A.E. / Wang, C.C. / Tanaka, K.S. / Almo, S.C. / Schramm, V.L.
CitationJournal: J.Biol.Chem. / Year: 2002
Title: Closed Site Complexes of Adenine Phosphoribosyltransferase from Giardia lamblia Reveal a Mechanism of Ribosyl Migration.
Authors: Shi, W. / Sarver, A.E. / Wang, C.C. / Tanaka, K.S. / Almo, S.C. / Schramm, V.L.
History
DepositionFeb 19, 2002Deposition site: RCSB / Processing site: RCSB
Revision 1.0Nov 27, 2002Provider: repository / Type: Initial release
Revision 1.1Apr 28, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Derived calculations / Version format compliance
Revision 1.3Aug 16, 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_ref_seq_dif / struct_site
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details / _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

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Assembly

Deposited unit
A: Adenine phosphoribosyltransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)20,7135
Polymers20,2911
Non-polymers4224
Water1,60389
1
A: Adenine phosphoribosyltransferase
hetero molecules

A: Adenine phosphoribosyltransferase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)41,42610
Polymers40,5812
Non-polymers8458
Water362
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation5_675x-y+1,-y+2,-z+2/31
Buried area4750 Å2
ΔGint-111 kcal/mol
Surface area14650 Å2
MethodPISA, PQS
Unit cell
Length a, b, c (Å)54.329, 54.329, 108.851
Angle α, β, γ (deg.)90, 90, 120
Int Tables number152
Space group name H-MP3121
Components on special symmetry positions
IDModelComponents
11A-464-

HOH

21A-472-

HOH

DetailsThe biological assembly is a dimer generated from the monomer in the asymmetric unit by applying the crystallographic 2-fold.

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Components

#1: Protein Adenine phosphoribosyltransferase


Mass: 20290.617 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Giardia intestinalis (eukaryote) / Production host: Escherichia coli (E. coli)
References: UniProt: Q967M2, adenine phosphoribosyltransferase
#2: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: SO4
#3: Chemical ChemComp-9DA / 9-DEAZAADENINE


Mass: 134.139 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H6N4
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 89 / 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: 2.2 Å3/Da / Density % sol: 44 %
Crystal growTemperature: 291 K / Method: vapor diffusion, hanging drop / pH: 4.6
Details: PEG 4000, ammonium sulfate, urea, sodium acetate, pH 4.6, VAPOR DIFFUSION, HANGING DROP, temperature 291K
Crystal grow
*PLUS
Temperature: 18 ℃ / Method: vapor diffusion
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetails
110 mg/mlprotein1drop
2100 mMsodium acetate1reservoirpH4.6
324 %PEG40001reservoir
40.2 Mammonium sulfate1reservoir
50.05 Murea1reservoir

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: NSLS / Beamline: X9B / Wavelength: 0.98 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Apr 29, 2001
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.98 Å / Relative weight: 1
ReflectionResolution: 1.85→25 Å / Num. all: 16337 / Num. obs: 16337 / % possible obs: 99.1 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 4.5 % / Biso Wilson estimate: 15.4 Å2 / Rsym value: 0.027 / Net I/σ(I): 28.8
Reflection shellResolution: 1.85→1.92 Å / Redundancy: 4.2 % / Mean I/σ(I) obs: 2.9 / Num. unique all: 1602 / Rsym value: 0.352 / % possible all: 98.8
Reflection
*PLUS
Lowest resolution: 25 Å / Num. measured all: 73591 / Rmerge(I) obs: 0.027
Reflection shell
*PLUS
% possible obs: 98.8 % / Rmerge(I) obs: 0.352

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNS1refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1G2P

1g2p


Resolution: 1.85→25 Å / Rfactor Rfree error: 0.006 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 2 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.251 1498 10.1 %random
Rwork0.219 ---
obs0.222 14886 90.2 %-
all-15703 --
Solvent computationSolvent model: flat model / Bsol: 47.1677 Å2 / ksol: 0.369266 e/Å3
Displacement parametersBiso mean: 30.7 Å2
Baniso -1Baniso -2Baniso -3
1-4.45 Å24.94 Å20 Å2
2--4.45 Å20 Å2
3----8.9 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.28 Å0.23 Å
Luzzati d res low-5 Å
Luzzati sigma a0.27 Å0.19 Å
Refinement stepCycle: LAST / Resolution: 1.85→25 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1365 0 25 89 1479
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.007
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_dihedral_angle_d23.9
X-RAY DIFFRACTIONc_improper_angle_d0.79
LS refinement shellResolution: 1.85→1.97 Å / Rfactor Rfree error: 0.023 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.337 211 10.2 %
Rwork0.269 1854 -
obs-2065 76.7 %
Refinement
*PLUS
Lowest resolution: 25 Å
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_angle_deg1.348
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg23.9
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg0.79

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