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- PDB-1kfg: The X-ray Crystal Structure of Cel9G from Clostridium cellulolyti... -

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Basic information

Entry
Database: PDB / ID: 1kfg
TitleThe X-ray Crystal Structure of Cel9G from Clostridium cellulolyticum complexed with a Thio-Oligosaccharide Inhibitor
ComponentsENDOGLUCANASE G
KeywordsHYDROLASE / endoglucanase / family 9 / thio-oligosaccharide / cellulose binding domain / (alpha-alpha)6-barrel
Function / homology
Function and homology information


cellulose binding / cellulase / cellulase activity / cellulose catabolic process
Similarity search - Function
Glycosyl hydrolases family 9 (GH9) active site signature 1. / Endoglucanase-like / Glycoside hydrolase family 9, His active site / Glycosyl hydrolases family 9 (GH9) active site signature 2. / Glycosyl hydrolases family 9, Asp/Glu active sites / Glycosyl hydrolases family 9 (GH9) active site signature 3. / Cellulose binding domain / Carbohydrate-binding module 3 / Cellulose binding domain / CBM3 (carbohydrate binding type-3) domain profile. ...Glycosyl hydrolases family 9 (GH9) active site signature 1. / Endoglucanase-like / Glycoside hydrolase family 9, His active site / Glycosyl hydrolases family 9 (GH9) active site signature 2. / Glycosyl hydrolases family 9, Asp/Glu active sites / Glycosyl hydrolases family 9 (GH9) active site signature 3. / Cellulose binding domain / Carbohydrate-binding module 3 / Cellulose binding domain / CBM3 (carbohydrate binding type-3) domain profile. / Carbohydrate-binding module 3 superfamily / Glycoside hydrolase family 9 / Glycosyl hydrolase family 9 / Clostridium cellulosome enzymes repeated domain signature. / Dockerin domain / Dockerin domain profile. / Dockerin type I domain / Dockerin type I repeat / Dockerin domain superfamily / CBM2/CBM3, carbohydrate-binding domain superfamily / Glycosyltransferase - #10 / Six-hairpin glycosidase-like superfamily / Six-hairpin glycosidase superfamily / Glycosyltransferase / Alpha/alpha barrel / EF-hand calcium-binding domain. / Immunoglobulin-like / Sandwich / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
NICKEL (II) ION / Endoglucanase G
Similarity search - Component
Biological speciesClostridium cellulolyticum (bacteria)
MethodX-RAY DIFFRACTION / FOURIER SYNTHESIS / Resolution: 1.9 Å
AuthorsMandelman, D. / Belaich, A. / Belaich, J.-P. / Driguez, H. / Haser, R.
CitationJournal: J.Bacteriol. / Year: 2003
Title: The X-ray crystal structure of the multidomain endoglucanase Cel9G from Clostridium cellulolyticum complexed with natural and synthetic cello-olligosaccharides
Authors: Mandelman, D. / Belaich, A. / Belaich, J.-P. / Aghajari, N. / Driguez, H. / Haser, R.
History
DepositionNov 20, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 15, 2003Provider: repository / Type: Initial release
Revision 1.1Apr 27, 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 / Database references / Derived calculations / Refinement description / 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 / pdbx_struct_conn_angle / software / struct_asym / struct_conn / struct_ref_seq_dif / 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 / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr2_auth_comp_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_atom_id / _pdbx_struct_conn_angle.ptnr2_label_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.conn_type_id / _struct_conn.id / _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.ptnr1_label_seq_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 / _struct_conn.ptnr2_label_seq_id / _struct_ref_seq_dif.details
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Aug 16, 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

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: ENDOGLUCANASE G
B: ENDOGLUCANASE G
hetero molecules


Theoretical massNumber of molelcules
Total (without water)138,38319
Polymers136,1222
Non-polymers2,26117
Water11,998666
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)57.040, 57.730, 86.630
Angle α, β, γ (deg.)93.86, 100.83, 99.54
Int Tables number1
Space group name H-MP1

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Components

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Protein / Sugars , 2 types, 4 molecules AB

#1: Protein ENDOGLUCANASE G / E.C.3.2.1.4 / Cellulase 9G / ENDO-1 / 4-BETA-GLUCANASE G / CELLULASE G / EGCCG


Mass: 68061.086 Da / Num. of mol.: 2 / Fragment: residues 36-649 of SWS P37700
Source method: isolated from a genetically manipulated source
Details: Complexed with hemithiocellodextrin GS4-GLC-GS4-GS1. Protein chain A complexed with chain X, B with Y
Source: (gene. exp.) Clostridium cellulolyticum (bacteria) / Gene: CELCCG / Plasmid: pGEX-5X-2, pET-22b / Production host: Escherichia coli (E. coli) / Strain (production host): E. coli BL-21 / References: UniProt: P37700, cellulase
#2: Polysaccharide 4-thio-beta-D-glucopyranose-(1-4)-beta-D-glucopyranose-(1-4)-4-thio-beta-D-glucopyranose-(1-4)-1- ...4-thio-beta-D-glucopyranose-(1-4)-beta-D-glucopyranose-(1-4)-4-thio-beta-D-glucopyranose-(1-4)-1-thio-beta-D-glucopyranose


Type: oligosaccharide / Mass: 714.773 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
WURCS=2.0/3,4,3/[a2122h-1b_1-5_1*S][a2122h-1b_1-5][a2122h-1b_1-5_4*S]/1-2-2-3/a4-b1_b4-c1*S*_c4-d1WURCSPDB2Glycan 1.1.0
[][b-D-Glcp1SH]{[(4+1)][b-D-Glcp4SH]{[(4+S)][b-D-Glcp]{[(4+1)][b-D-Glcp4SH]{}}}}LINUCSPDB-CARE

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Non-polymers , 6 types, 681 molecules

#3: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Ca
#4: Chemical
ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: Mg
#5: Chemical ChemComp-TRS / 2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL / TRIS BUFFER


Mass: 122.143 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C4H12NO3 / Comment: pH buffer*YM
#6: Chemical
ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C3H8O3
#7: Chemical ChemComp-NI / NICKEL (II) ION


Mass: 58.693 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Ni
#8: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 666 / 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: 2.02 Å3/Da / Density % sol: 39.06 %
Crystal growTemperature: 290 K / Method: vapor diffusion, hanging drop / pH: 8.4
Details: Peg 4000, Tris, MgAcO, Isopropanol, Glycerol, pH 8.4, VAPOR DIFFUSION, HANGING DROP, temperature 290K
Crystal grow
*PLUS
Temperature: 17 ℃ / Method: vapor diffusion, hanging drop
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDDetails
125 %PEG40001reservoir
2100 mMTris-HCl1reservoirpH8.4
3100 mMmagnesium acetate1reservoir
45 %isopropanol1reservoir
515 %glycerol1reservoir
66.25 mg/mlprotein1drop

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: ENRAF-NONIUS FR571 / Wavelength: 1.5418 Å
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Date: Mar 1, 2001 / Details: Osmic mirrors
RadiationMonochromator: Osmic mirrors / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 1.9→42 Å / Num. all: 95613 / Num. obs: 87964 / % possible obs: 92 % / Observed criterion σ(I): 4.8 / Redundancy: 2.7 % / Biso Wilson estimate: 15.4 Å2 / Rsym value: 0.048 / Net I/σ(I): 18.2
Reflection shellResolution: 1.9→1.96 Å / Mean I/σ(I) obs: 4.8 / Num. unique all: 5168 / Rsym value: 0.183 / % possible all: 87.6
Reflection
*PLUS
Lowest resolution: 50 Å / Num. obs: 270109 / % possible obs: 88.7 % / Redundancy: 2.6 % / Rmerge(I) obs: 0.048
Reflection shell
*PLUS
% possible obs: 87.4 % / Rmerge(I) obs: 0.199 / Mean I/σ(I) obs: 3.8

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Processing

Software
NameClassification
MAR345data collection
SCALEPACKdata scaling
CNSrefinement
CNSphasing
RefinementMethod to determine structure: FOURIER SYNTHESIS
Starting model: 1G87

1g87


Resolution: 1.9→42.42 Å / Rfactor Rfree error: 0.003 / Data cutoff high absF: 1381731.32 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / σ(I): 3 / Stereochemistry target values: Engh & Huber
RfactorNum. reflection% reflectionSelection details
Rfree0.204 3933 5 %RANDOM
Rwork0.167 ---
obs0.1671 78166 93.2 %-
all-83869 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 50.1449 Å2 / ksol: 0.399916 e/Å3
Displacement parametersBiso mean: 17.9 Å2
Baniso -1Baniso -2Baniso -3
1--0.48 Å22.67 Å2-1 Å2
2--5.35 Å2-0.74 Å2
3----4.87 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.22 Å0.18 Å
Luzzati d res low-50 Å
Luzzati sigma a0.15 Å0.09 Å
Refinement stepCycle: LAST / Resolution: 1.9→42.42 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms9543 0 132 666 10341
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.01
X-RAY DIFFRACTIONc_angle_deg1.4
X-RAY DIFFRACTIONc_dihedral_angle_d23.1
X-RAY DIFFRACTIONc_improper_angle_d0.86
X-RAY DIFFRACTIONc_mcbond_it1.11.5
X-RAY DIFFRACTIONc_mcangle_it1.572
X-RAY DIFFRACTIONc_scbond_it1.712
X-RAY DIFFRACTIONc_scangle_it2.352.5
LS refinement shellResolution: 1.9→1.97 Å / Rfactor Rfree error: 0.013 / Total num. of bins used: 10
RfactorNum. reflection% reflection
Rfree0.251 384 5.2 %
Rwork0.214 6952 -
obs--87.7 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2LIGANDS.PARAMLIGANDS.TOP
X-RAY DIFFRACTION3WATER_REP.PARAMWATER.TOP
X-RAY DIFFRACTION4ION.PARAMION.TOP
X-RAY DIFFRACTION5CARBOHYDRATE.PARAM.MICHELCARBOHYDRATE.TOP.MICHEL
Refinement
*PLUS
Highest resolution: 1.9 Å / Lowest resolution: 50 Å
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.01
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg23.1
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg0.9

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