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- PDB-1nh6: Structure of S. marcescens chitinase A, E315L, complex with hexas... -

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Basic information

Entry
Database: PDB / ID: 1nh6
TitleStructure of S. marcescens chitinase A, E315L, complex with hexasaccharide
Componentschitinase A
KeywordsHYDROLASE / (beta/alpha)8-barrel / oligosaccharide complex
Function / homology
Function and homology information


endochitinase activity / chitinase / chitin catabolic process / chitin binding / polysaccharide catabolic process
Similarity search - Function
Chitinase A N-terminal / Chitinase A, N-terminal domain / PKD/Chitinase domain / Repeats in polycystic kidney disease 1 (PKD1) and other proteins / 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 ...Chitinase A N-terminal / Chitinase A, N-terminal domain / PKD/Chitinase domain / Repeats in polycystic kidney disease 1 (PKD1) and other proteins / 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 / Immunoglobulin E-set / Glycoside hydrolase superfamily / TIM Barrel / Alpha-Beta Barrel / Roll / Immunoglobulin-like fold / Immunoglobulins / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
Biological speciesSerratia marcescens (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.05 Å
AuthorsAronson Jr., N.N. / Halloran, B.A. / Alexyev, M.F. / Amable, L. / Madura, J.D. / Pasupulati, L. / Worth, C. / Van Roey, P.
CitationJournal: Biochem.J. / Year: 2003
Title: Family 18 chitinase-oligosaccharide substrate interaction: subsite preference and anomer selectivity of Serratia marcescens chitinase A.
Authors: Aronson Jr., N.N. / Halloran, B.A. / Alexyev, M.F. / Amable, L. / Madura, J.D. / Pasupulati, L. / Worth, C. / Van Roey, P.
History
DepositionDec 18, 2002Deposition site: RCSB / Processing site: RCSB
Revision 1.0Mar 18, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 29, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Non-polymer description / Version format compliance
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_entity_branch / pdbx_entity_branch_descriptor / pdbx_entity_branch_link / pdbx_entity_branch_list / pdbx_entity_nonpoly / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / struct_asym / struct_conn / struct_site / struct_site_gen
Item: _atom_site.auth_asym_id / _atom_site.auth_seq_id ..._atom_site.auth_asym_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _chem_comp.name / _chem_comp.type / _entity.formula_weight / _entity.pdbx_description / _entity.pdbx_number_of_molecules / _entity.type / _pdbx_struct_assembly_gen.asym_id_list / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Oct 27, 2021Group: Database references / Structure summary / Category: chem_comp / database_2 / struct_ref_seq_dif
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details
Revision 2.2Aug 16, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 2.3Oct 30, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature
Remark 999sequence The author indicates that these represent strain variations.

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: chitinase A
hetero molecules


Theoretical massNumber of molelcules
Total (without water)59,8912
Polymers58,6541
Non-polymers1,2371
Water11,440635
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)78.100, 135.230, 188.070
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number23
Space group name H-MI222

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Components

#1: Protein chitinase A


Mass: 58653.660 Da / Num. of mol.: 1 / Mutation: E315L
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Serratia marcescens (bacteria) / Plasmid: pET23a / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3)
References: GenBank: 3308994, UniProt: P07254*PLUS, chitinase
#2: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1237.172 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-4DGlcpNAcb1-4DGlcpNAcb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,6,5/[a2122h-1b_1-5_2*NCC/3=O]/1-1-1-1-1-1/a4-b1_b4-c1_c4-d1_d4-e1_e4-f1WURCSPDB2Glycan 1.1.0
[][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}}}}LINUCSPDB-CARE
#3: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 635 / Source method: isolated from a natural source / Formula: H2O
Has protein modificationY

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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: 3.65 Å3/Da / Density % sol: 66.04 %
Crystal growTemperature: 283 K / Method: vapor diffusion, hanging drop / pH: 7
Details: 8-12% ethanol, 0.8-1.3 M NaCl, 0.1 M HEPES, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 283K
Crystal grow
*PLUS
pH: 6.5
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetailsChemical formula
14 mg/mlprotein1drop
210 mMsodium cacodylate1droppH6.5
30.5 M1dropnac
48-12 %(v/v)ethanol1reservoir
50.8-1.3 M1reservoirNaCl
60.1 MHEPES1reservoirpH7.0

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SSRL / Beamline: BL9-1 / Wavelength: 1 Å
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Date: May 12, 2000
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 2.05→30 Å / Num. all: 681751 / Num. obs: 681751 / Observed criterion σ(I): 0 / Redundancy: 4.4 % / Biso Wilson estimate: 13.4 Å2 / Rmerge(I) obs: 0.069 / Net I/σ(I): 9.2
Reflection shellResolution: 2.05→2.1 Å / Redundancy: 4 % / Rmerge(I) obs: 0.318 / Mean I/σ(I) obs: 2.4 / % possible all: 87.3
Reflection
*PLUS
Lowest resolution: 36 Å / % possible obs: 98.6 %
Reflection shell
*PLUS
% possible obs: 87.3 %

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Processing

Software
NameVersionClassification
CNS1refinement
MOSFLMdata reduction
CCP4(SCALA)data scaling
AMoREphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 1EDQ

1edq


Resolution: 2.05→29.16 Å / Rfactor Rfree error: 0.003 / Data cutoff high absF: 2735168.21 / Data cutoff high rms absF: 2735168.21 / 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
Rfree0.227 6256 10.1 %RANDOM
Rwork0.197 ---
obs0.197 61725 98.5 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 57.1079 Å2 / ksol: 0.349994 e/Å3
Displacement parametersBiso mean: 25.8 Å2
Baniso -1Baniso -2Baniso -3
1-7.48 Å20 Å20 Å2
2---6.51 Å20 Å2
3----0.96 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.27 Å0.23 Å
Luzzati d res low-5 Å
Luzzati sigma a0.22 Å0.19 Å
Refinement stepCycle: LAST / Resolution: 2.05→29.16 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4138 0 85 635 4858
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.006
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_dihedral_angle_d25.1
X-RAY DIFFRACTIONc_improper_angle_d0.76
X-RAY DIFFRACTIONc_mcbond_it0.591.5
X-RAY DIFFRACTIONc_mcangle_it1.022
X-RAY DIFFRACTIONc_scbond_it1.192
X-RAY DIFFRACTIONc_scangle_it1.662.5
LS refinement shellResolution: 2.05→2.18 Å / Rfactor Rfree error: 0.009 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.266 965 9.9 %
Rwork0.237 8796 -
obs--94.3 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER.PARAMWATER.TOP
X-RAY DIFFRACTION3CARBOHYDRATE.PARAMCARBOHYDRATE.TOP
Software
*PLUS
Version: 0.9 / Classification: refinement
Refinement
*PLUS
Lowest resolution: 36 Å / Rfactor Rfree: 0.225 / Rfactor Rwork: 0.195
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.0056
X-RAY DIFFRACTIONc_angle_deg1.25
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg25.1
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg0.76

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