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- PDB-1x39: Crystal structure of barley beta-D-glucan glucohydrolase isoenzym... -

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Basic information

Entry
Database: PDB / ID: 1x39
TitleCrystal structure of barley beta-D-glucan glucohydrolase isoenzyme exo1 in complex with gluco-phenylimidazole
Componentsbeta-D-glucan exohydrolase isoenzyme ExoI
KeywordsHYDROLASE / 2-domain fold / ligand-protein complex
Function / homology
Function and homology information


beta-glucosidase / hydrolase activity, hydrolyzing O-glycosyl compounds / carbohydrate metabolic process / extracellular region
Similarity search - Function
Glycoside hydrolase family 3 C-terminal domain / : / Glycoside hydrolase, family 3, N-terminal domain / Glycoside hydrolase family 3 C-terminal domain / Glycosyl hydrolase family 3 C-terminal domain / Glycoside hydrolase family 3 C-terminal domain superfamily / Glycoside hydrolase, family 3, N-terminal / Glycoside hydrolase, family 3, N-terminal domain superfamily / Glycosyl hydrolase family 3 N terminal domain / Glycoside hydrolase superfamily ...Glycoside hydrolase family 3 C-terminal domain / : / Glycoside hydrolase, family 3, N-terminal domain / Glycoside hydrolase family 3 C-terminal domain / Glycosyl hydrolase family 3 C-terminal domain / Glycoside hydrolase family 3 C-terminal domain superfamily / Glycoside hydrolase, family 3, N-terminal / Glycoside hydrolase, family 3, N-terminal domain superfamily / Glycosyl hydrolase family 3 N terminal domain / Glycoside hydrolase superfamily / TIM Barrel / Alpha-Beta Barrel / Rossmann fold / 3-Layer(aba) Sandwich / Alpha Beta
Similarity search - Domain/homology
Chem-IDE / : / beta-glucosidase
Similarity search - Component
Biological speciesHordeum vulgare (barley)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.8 Å
AuthorsHrmova, M. / Streltsov, V.A. / Smith, B.J. / Vasella, A. / Varghese, J.N. / Fincher, G.B.
CitationJournal: Biochemistry / Year: 2005
Title: Structural rationale for low-nanomolar binding of transition state mimics to a family GH3 beta-D-glucan glucohydrolase from barley.
Authors: Hrmova, M. / Streltsov, V.A. / Smith, B.J. / Vasella, A. / Varghese, J.N. / Fincher, G.B.
History
DepositionMay 2, 2005Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 20, 2005Provider: repository / Type: Initial release
Revision 1.1Apr 30, 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.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 / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_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 2.1Oct 25, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / struct_conn
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.pdbx_leaving_atom_flag

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: beta-D-glucan exohydrolase isoenzyme ExoI
hetero molecules


Theoretical massNumber of molelcules
Total (without water)68,50910
Polymers65,0541
Non-polymers3,4559
Water15,745874
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)99.991, 99.991, 184.386
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number96
Space group name H-MP43212

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Components

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Protein , 1 types, 1 molecules A

#1: Protein beta-D-glucan exohydrolase isoenzyme ExoI / beta-D-glucan glucohydrolase isoenzyme exo1


Mass: 65054.082 Da / Num. of mol.: 1 / Fragment: residues 1-602 / Source method: isolated from a natural source / Source: (natural) Hordeum vulgare (barley) / Strain: cultivar clipper
References: GenBank: 4566505, UniProt: Q9XEI3*PLUS, glucan 1,3-beta-glucosidase

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Sugars , 3 types, 3 molecules

#2: Polysaccharide beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}}LINUCSPDB-CARE
#3: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[beta-D-xylopyranose-(1- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)-[beta-D-xylopyranose-(1-2)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-3)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1230.131 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-2DManpa1-6[DXylpb1-2]DManpb1-4DGlcpNAcb1-4[LFucpa1-3]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/5,7,6/[a2122h-1b_1-5_2*NCC/3=O][a1221m-1a_1-5][a1122h-1b_1-5][a212h-1b_1-5][a1122h-1a_1-5]/1-2-1-3-4-5-1/a3-b1_a4-c1_c4-d1_d2-e1_d6-f1_f2-g1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(3+1)][a-L-Fucp]{}[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(2+1)][b-D-Xylp]{}[(6+1)][a-D-Manp]{[(2+1)][b-D-GlcpNAc]{}}}}}}LINUCSPDB-CARE
#4: Polysaccharide beta-D-xylopyranose-(1-2)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)- ...beta-D-xylopyranose-(1-2)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-3)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 864.797 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DXylpb1-2DManpb1-4DGlcpNAcb1-4[LFucpa1-3]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/4,5,4/[a2122h-1b_1-5_2*NCC/3=O][a1221m-1a_1-5][a1122h-1b_1-5][a212h-1b_1-5]/1-2-1-3-4/a3-b1_a4-c1_c4-d1_d2-e1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(3+1)][a-L-Fucp]{}[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(2+1)][b-D-Xylp]{}}}}}LINUCSPDB-CARE

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Non-polymers , 4 types, 880 molecules

#5: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: SO4
#6: Chemical ChemComp-IDE / (5R,6R,7S,8S)-3-(ANILINOMETHYL)-5,6,7,8-TETRAHYDRO-5-(HYDROXYMETHYL)-IMIDAZO[1,2-A]PYRIDINE-6,7,8-TRIOL / ANILINOMETHYL GLUCO-PHENYLIMIDAZOLE


Mass: 305.329 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C15H19N3O4
#7: Chemical ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C3H8O3
#8: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 874 / 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: 3.540508 Å3/Da / Density % sol: 65.259224 %
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 7
Details: AMMONIUM SULPHATE, PEG 400, SODIUM ACETATE, HEPES-NAOH, pH 7.0, VAPOR DIFFUSION, HANGING DROP, temperature 277K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: Photon Factory / Beamline: BL-5A / Wavelength: 1 / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Nov 20, 2004 / Details: RH COATED SI MIRROR
RadiationMonochromator: SI(111) DOUBLE CRYSTAL / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.8→48.3 Å / Num. all: 87150 / Num. obs: 87150 / % possible obs: 100 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 14 % / Rmerge(I) obs: 0.132 / Net I/σ(I): 23.5
Reflection shellResolution: 1.8→1.86 Å / Rmerge(I) obs: 0.981 / Mean I/σ(I) obs: 2.93 / % possible all: 100

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Processing

Software
NameClassification
DENZOdata reduction
SCALEPACKdata scaling
CCP4model building
REFMACrefinement
CCP4phasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB ENTRY 1X38

1x38


Resolution: 1.8→48.3 Å / SU B: 3.228 / SU ML: 0.056 / Isotropic thermal model: isotropic and TLS / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.09 / ESU R Free: 0.089 / Stereochemistry target values: Engh & Huber / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflectionSelection details
Rfree0.185 4358 5 %RANDOM
Rwork0.159 ---
all0.16 87042 --
obs0.16 87042 99.9 %-
Displacement parametersBiso mean: 32.558 Å2
Baniso -1Baniso -2Baniso -3
1--0.16 Å20 Å20 Å2
2---0.16 Å20 Å2
3---0.32 Å2
Refinement stepCycle: LAST / Resolution: 1.8→48.3 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4566 0 230 874 5670
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONp_bond_d0.01
X-RAY DIFFRACTIONp_angle_d1.264
LS refinement shellResolution: 1.8→1.847 Å
RfactorNum. reflection% reflection
Rfree0.256 316 -
Rwork0.207 --
obs-5952 98.72 %

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