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- PDB-3ch9: Crystal structure of Aspergillus fumigatus chitinase B1 in comple... -

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Basic information

Entry
Database: PDB / ID: 3ch9
TitleCrystal structure of Aspergillus fumigatus chitinase B1 in complex with dimethylguanylurea
ComponentsChitinase
KeywordsHYDROLASE/HYDROLASE inhibitor / (beta-alpha)8 barrel / chitinase / peptide inhibitors / hydrolase / Glycosidase / HYDROLASE-HYDROLASE inhibitor complex
Function / homology
Function and homology information


endochitinase activity / chitinase / chitin catabolic process / chitin binding / polysaccharide catabolic process / extracellular region
Similarity search - Function
Chitinase A; domain 3 - #10 / Glycosyl hydrolases family 18 (GH18) active site / Glycosyl hydrolases family 18 (GH18) active site signature. / : / Chitinase insertion domain superfamily / Chitinase II / Glyco_18 / Glycosyl hydrolases family 18 / Glycosyl hydrolases family 18 (GH18) domain profile. / Glycoside hydrolase family 18, catalytic domain ...Chitinase A; domain 3 - #10 / Glycosyl hydrolases family 18 (GH18) active site / Glycosyl hydrolases family 18 (GH18) active site signature. / : / Chitinase insertion domain superfamily / Chitinase II / Glyco_18 / Glycosyl hydrolases family 18 / Glycosyl hydrolases family 18 (GH18) domain profile. / Glycoside hydrolase family 18, catalytic domain / Chitinase A; domain 3 / Glycosidases / Glycoside hydrolase superfamily / TIM Barrel / Alpha-Beta Barrel / Roll / Alpha Beta
Similarity search - Domain/homology
1-methyl-3-(N-methylcarbamimidoyl)urea / Endochitinase B1
Similarity search - Component
Biological speciesAspergillus fumigatus (mold)
MethodX-RAY DIFFRACTION / Known phases / Resolution: 2.2 Å
AuthorsAndersen, O.A. / van Aalten, D.M.F.
CitationJournal: Chem.Biol. / Year: 2008
Title: Structure-based dissection of the natural product cyclopentapeptide chitinase inhibitor argifin.
Authors: Andersen, O.A. / Nathubhai, A. / Dixon, M.J. / Eggleston, I.M. / van Aalten, D.M.
History
DepositionMar 9, 2008Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 25, 2008Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Atomic model / Database references ...Atomic model / Database references / Derived calculations / Non-polymer description / Structure summary / Version format compliance
Revision 1.2Aug 30, 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
A: Chitinase
B: Chitinase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)96,83317
Polymers95,3242
Non-polymers1,50915
Water9,944552
1
A: Chitinase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)48,2727
Polymers47,6621
Non-polymers6106
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
2
B: Chitinase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)48,56010
Polymers47,6621
Non-polymers8999
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)117.774, 117.774, 99.574
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number76
Space group name H-MP41

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Components

#1: Protein Chitinase / Class V chitinase ChiB1


Mass: 47661.836 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Aspergillus fumigatus (mold) / Gene: chiB1 / Plasmid: pLysS / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: Q873X9, chitinase
#2: Chemical
ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 13 / Source method: obtained synthetically / Formula: SO4
#3: Chemical ChemComp-XRG / 1-methyl-3-(N-methylcarbamimidoyl)urea


Mass: 130.148 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C4H10N4O
#4: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 552 / 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: 3.62 Å3/Da / Density % sol: 66.04 %
Crystal growTemperature: 293 K / Method: vapor diffusion, hanging drop / pH: 9.5
Details: Tris/HCl, Li2SO4, pH 9.5, VAPOR DIFFUSION, HANGING DROP, temperature 293K

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Data collection

DiffractionMean temperature: 173 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU / Wavelength: 1.5418 Å
DetectorType: RIGAKU RAXIS IV / Detector: IMAGE PLATE / Date: Aug 30, 2007 / Details: mirrors
RadiationMonochromator: mirrors / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.2→20 Å / Num. all: 68966 / Num. obs: 67434 / % possible obs: 97.9 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 3.3 % / Biso Wilson estimate: 37.9 Å2 / Rmerge(I) obs: 0.084 / Net I/σ(I): 17.5
Reflection shellResolution: 2.2→2.28 Å / Redundancy: 2.8 % / Rmerge(I) obs: 0.492 / Mean I/σ(I) obs: 2.1 / % possible all: 95.6

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Processing

Software
NameVersionClassification
CrystalCleardata collection
PHASESfrom pdb entry 1W9Pphasing
CNS1refinement
DENZOdata reduction
StructureStudiodata collection
RefinementMethod to determine structure: Known phases
Starting model: PDB entry 1W9V

1w9v


Resolution: 2.2→20 Å / Isotropic thermal model: Isotropic / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 0 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.221 682 -Random
Rwork0.187 ---
all0.187 68917 --
obs0.187 67428 97.8 %-
Displacement parametersBiso mean: 33.3 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.3 Å0.25 Å
Luzzati d res low-5 Å
Luzzati sigma a0.27 Å0.25 Å
Refinement stepCycle: LAST / Resolution: 2.2→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6140 0 83 552 6775
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.011
X-RAY DIFFRACTIONc_angle_deg1.55
X-RAY DIFFRACTIONc_dihedral_angle_d23.7
X-RAY DIFFRACTIONc_improper_angle_d1
LS refinement shellResolution: 2.2→2.26 Å
RfactorNum. reflection
Rfree0.334 58
Rwork0.285 -
obs-4866

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