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- PDB-1e6r: Chitinase B from Serratia marcescens wildtype in complex with inh... -

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Basic information

Entry
Database: PDB / ID: 1e6r
TitleChitinase B from Serratia marcescens wildtype in complex with inhibitor allosamidin
ComponentsCHITINASE B
KeywordsHYDROLASE / CHITIN DEGRADATION / INHIBITOR ALLOSAMIDIN
Function / homology
Function and homology information


chitinase / chitin catabolic process / chitin binding / polysaccharide catabolic process / hydrolase activity, hydrolyzing O-glycosyl compounds / carbohydrate binding / extracellular region
Similarity search - Function
Carbohydrate-binding module superfamily 5/12 / Seminal Fluid Protein PDC-109 (Domain B) / Chitin-binding domain type 3 / Carbohydrate-binding module family 5/12 / Carbohydrate-binding module superfamily 5/12 / Chitinase A; domain 3 - #10 / Glycosyl hydrolases family 18 (GH18) active site / Glycosyl hydrolases family 18 (GH18) active site signature. / : / Chitinase insertion domain superfamily ...Carbohydrate-binding module superfamily 5/12 / Seminal Fluid Protein PDC-109 (Domain B) / Chitin-binding domain type 3 / Carbohydrate-binding module family 5/12 / Carbohydrate-binding module superfamily 5/12 / 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 / Ribbon / Glycosidases / Glycoside hydrolase superfamily / TIM Barrel / Alpha-Beta Barrel / Roll / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
ALLOSAMIZOLINE / chitinase
Similarity search - Component
Biological speciesSERRATIA MARCESCENS (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.5 Å
AuthorsKomander, D. / Synstad, B. / Eijsink, V.G.H. / Van Aalten, D.M.F.
CitationJournal: Proc.Natl.Acad.Sci.USA / Year: 2001
Title: Structural Insights Into the Catalytic Mechanism of a Family 18 Exo-Chitinase
Authors: Van Aalten, D.M.F. / Komander, D. / Synstad, B. / Gseidnes, S. / Peter, M.G. / Eijsink, V.G.H.
History
DepositionAug 22, 2000Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 22, 2001Provider: repository / Type: Initial release
Revision 1.1May 8, 2011Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 2.0Jul 29, 2020Group: Atomic model / Data collection ...Atomic model / Data collection / Derived calculations / Other / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / diffrn_source / entity / pdbx_branch_scheme / pdbx_chem_comp_identifier / pdbx_database_status / 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.B_iso_or_equiv / _atom_site.Cartn_x ..._atom_site.B_iso_or_equiv / _atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_asym_id / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.label_asym_id / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_entity_id / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _diffrn_source.pdbx_synchrotron_site / _entity.formula_weight / _entity.pdbx_description / _entity.pdbx_number_of_molecules / _entity.type / _pdbx_database_status.status_code_sf / _pdbx_struct_assembly_gen.asym_id_list / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Dec 13, 2023Group: Data collection / Database references ...Data collection / Database references / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 2.2Nov 20, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature / Item: _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: CHITINASE B
B: CHITINASE B
hetero molecules


Theoretical massNumber of molelcules
Total (without water)112,70210
Polymers111,0362
Non-polymers1,6668
Water6,305350
1


  • Idetical with deposited unit
  • defined by software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area2760 Å2
ΔGint-20.8 kcal/mol
Surface area44530 Å2
MethodPQS
Unit cell
Length a, b, c (Å)55.476, 103.427, 185.010
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121
Noncrystallographic symmetry (NCS)NCS oper: (Code: given / Matrix: (1), (1), (1))
DetailsBIOLOGICAL_UNIT: DIMERIC IN CRYSTAL, ACTIVE AS A MONOMER

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Components

#1: Protein CHITINASE B


Mass: 55518.012 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) SERRATIA MARCESCENS (bacteria) / Production host: ESCHERICHIA COLI (E. coli) / References: UniProt: Q54276
#2: Polysaccharide 2-acetamido-2-deoxy-beta-D-allopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-allopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DAllpNAcb1-4DAllpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2222h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-AllpNAc]{[(4+1)][b-D-AllpNAc]{}}LINUCSPDB-CARE
#3: Chemical ChemComp-AMI / ALLOSAMIZOLINE


Mass: 216.234 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C9H16N2O4
#4: Chemical
ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: SO4
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 350 / Source method: isolated from a natural source / Formula: H2O
Has protein modificationY
Sequence detailsSOME RESIDUES MUTATED TO ACCOUNT FOR MISSING DENSITY

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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: 2.5 Å3/Da / Density % sol: 50.6 %
Crystal growpH: 7
Details: 2.0M AMMONIUM SULFATE, 20% GLYCEROL, HEPES PH7.0, pH 7.00
Crystal grow
*PLUS
pH: 5.6 / Method: vapor diffusion, hanging drop
Details: Van Aalten, D.M.F., (2000) Proc. Natl. Acad. Sci. U.S.A., 97, 5842.
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
110 mg/mlprotein1drop
250 mMcitrate1reservoir
30.5 M1reservoirLi2SO4
40.25 Mammonium sulfate1reservoir

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: EMBL/DESY, HAMBURG / Beamline: X11 / Wavelength: 0.9073
DetectorType: MARRESEARCH / Detector: CCD / Date: May 12, 2000
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9073 Å / Relative weight: 1
ReflectionResolution: 2.5→25 Å / Num. obs: 139537 / % possible obs: 99.8 % / Observed criterion σ(I): 0 / Redundancy: 3.7 % / Biso Wilson estimate: 34.6 Å2 / Rmerge(I) obs: 0.109 / Net I/σ(I): 8.9
Reflection shellResolution: 2.5→2.59 Å / Redundancy: 3.9 % / Rmerge(I) obs: 0.426 / Mean I/σ(I) obs: 2.9 / % possible all: 99.9
Reflection
*PLUS
Num. obs: 37616 / Num. measured all: 139537
Reflection shell
*PLUS
% possible obs: 99.9 % / Num. unique obs: 3679 / Num. measured obs: 13502

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Processing

Software
NameVersionClassification
CNS1refinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1E15

1e15


Resolution: 2.5→24.9 Å / Rfactor Rfree error: 0.009 / Data cutoff high absF: 2018903.18 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.255 774 2.1 %RANDOM
Rwork0.198 ---
obs0.198 37568 99.7 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 28.3871 Å2 / ksol: 0.367362 e/Å3
Displacement parametersBiso mean: 22.4 Å2
Baniso -1Baniso -2Baniso -3
1-1.22 Å20 Å20 Å2
2--3.98 Å20 Å2
3----5.2 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.36 Å0.27 Å
Luzzati d res low-5 Å
Luzzati sigma a0.4 Å0.28 Å
Refinement stepCycle: LAST / Resolution: 2.5→24.9 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms7780 0 106 350 8236
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.007
X-RAY DIFFRACTIONc_bond_d_na
X-RAY DIFFRACTIONc_bond_d_prot
X-RAY DIFFRACTIONc_angle_d
X-RAY DIFFRACTIONc_angle_d_na
X-RAY DIFFRACTIONc_angle_d_prot
X-RAY DIFFRACTIONc_angle_deg1.3
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d23.5
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d0.8
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it1.281.5
X-RAY DIFFRACTIONc_mcangle_it1.992
X-RAY DIFFRACTIONc_scbond_it2.12
X-RAY DIFFRACTIONc_scangle_it2.882.5
LS refinement shellResolution: 2.5→2.66 Å / Rfactor Rfree error: 0.028 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.314 128 2.1 %
Rwork0.257 5978 -
obs--98.7 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2WATER_REP.PARAMWATER.TOP
X-RAY DIFFRACTION3CARBOHYDRATE.PARAMCARBOHYDRATE.TOP
X-RAY DIFFRACTION4ION.PARAMAMI.TOP
Software
*PLUS
Name: CNS / Version: 1 / Classification: refinement
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg23.5
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg0.8

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