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- PDB-3amc: Crystal structures of Thermotoga maritima Cel5A, apo form and dimer/au -

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Basic information

Entry
Database: PDB / ID: 3amc
TitleCrystal structures of Thermotoga maritima Cel5A, apo form and dimer/au
ComponentsEndoglucanase
KeywordsHYDROLASE / glycosyl hydrolase family 5 / cellulase / biofuel / hyperthermostable
Function / homology
Function and homology information


glucan catabolic process / beta-glucosidase activity / cell surface / extracellular region
Similarity search - Function
Glycoside hydrolase, family 5, conserved site / Glycosyl hydrolases family 5 signature. / Glycoside hydrolase, family 5 / Cellulase (glycosyl hydrolase family 5) / Glycosidases / Glycoside hydrolase superfamily / TIM Barrel / Alpha-Beta Barrel / Alpha Beta
Similarity search - Domain/homology
Biological speciesThermotoga maritima (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.4 Å
AuthorsWu, T.H. / Huang, C.H. / Ko, T.P. / Lai, H.L. / Ma, Y. / Cheng, Y.S. / Liu, J.R. / Guo, R.T.
CitationJournal: Biochim.Biophys.Acta / Year: 2011
Title: Diverse substrate recognition mechanism revealed by Thermotoga maritima Cel5A structures in complex with cellotetraose, cellobiose and mannotriose
Authors: Wu, T.H. / Huang, C.H. / Ko, T.P. / Lai, H.L. / Ma, Y. / Chen, C.C. / Cheng, Y.S. / Liu, J.R. / Guo, R.T.
History
DepositionAug 19, 2010Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 10, 2011Provider: repository / Type: Initial release
Revision 1.1Jun 5, 2013Group: Database references
Revision 1.2Mar 13, 2024Group: Data collection / Database references / Category: chem_comp_atom / chem_comp_bond / database_2
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Endoglucanase
B: Endoglucanase


Theoretical massNumber of molelcules
Total (without water)74,8772
Polymers74,8772
Non-polymers00
Water13,691760
1
A: Endoglucanase


Theoretical massNumber of molelcules
Total (without water)37,4391
Polymers37,4391
Non-polymers00
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
2
B: Endoglucanase


Theoretical massNumber of molelcules
Total (without water)37,4391
Polymers37,4391
Non-polymers00
Water181
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
Unit cell
Length a, b, c (Å)62.919, 78.340, 62.983
Angle α, β, γ (deg.)90.00, 97.25, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein Endoglucanase


Mass: 37438.523 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Thermotoga maritima (bacteria) / Strain: MSB8 / Gene: TM_1751 / Plasmid: pET32 Xa/LIC / Production host: Escherichia coli (E. coli) / Strain (production host): BL21 / References: UniProt: Q9X273, cellulase
#2: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 760 / 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: 2.06 Å3/Da / Density % sol: 40.19 %
Crystal growTemperature: 298 K / Method: vapor diffusion, sitting drop / pH: 8.5
Details: 0.4M NaCl, 0.1M Tris, 32% PEG 3350, pH 8.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: NSRRC / Beamline: BL13B1 / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: May 29, 2010
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 1.4→25 Å / Num. obs: 118042 / % possible obs: 99.4 % / Observed criterion σ(I): 0 / Redundancy: 3.8 % / Biso Wilson estimate: 15.9 Å2 / Rmerge(I) obs: 0.048
Reflection shellResolution: 1.4→1.45 Å / Redundancy: 3.8 % / Rmerge(I) obs: 0.186 / Mean I/σ(I) obs: 6.7 / % possible all: 100

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Processing

Software
NameClassification
HKL-2000data collection
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT / Resolution: 1.4→25 Å / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Details: BULK SOLVENT MODEL USED
RfactorNum. reflection% reflectionSelection details
Rfree0.2086 5884 4.9 %RANDOM
Rwork0.184 ---
obs-116630 97.9 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 34.3277 Å2 / ksol: 0.4 e/Å3
Displacement parametersBiso mean: 15.9243 Å2
Baniso -1Baniso -2Baniso -3
1-0.561 Å20 Å21.915 Å2
2---0.945 Å20 Å2
3---0.384 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.14 Å0.14 Å
Luzzati d res low-5 Å
Luzzati sigma a0.03 Å0.02 Å
Refinement stepCycle: LAST / Resolution: 1.4→25 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms5174 0 0 760 5934
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.023
X-RAY DIFFRACTIONc_angle_deg2.1
X-RAY DIFFRACTIONc_dihedral_angle_d23.7
X-RAY DIFFRACTIONc_improper_angle_d1.55
X-RAY DIFFRACTIONc_mcbond_it0.8311.5
X-RAY DIFFRACTIONc_scbond_it1.7632
X-RAY DIFFRACTIONc_mcangle_it1.1622
X-RAY DIFFRACTIONc_scangle_it2.5542.5
LS refinement shellResolution: 1.4→1.49 Å / Rfactor Rfree error: 0.006 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.256 1863 10 %
Rwork0.243 16785 -
obs--94.5 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2water_rep.paramwater.top

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