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- PDB-3bga: Crystal structure of beta-galactosidase from Bacteroides thetaiot... -

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Basic information

Entry
Database: PDB / ID: 3bga
TitleCrystal structure of beta-galactosidase from Bacteroides thetaiotaomicron VPI-5482
ComponentsBeta-galactosidase
KeywordsHYDROLASE / Beta-Galactosidase / NYSGXRC / Protein Structure Initiative II (PSI-II) / Glycosyl hydrolase family 2 / Jelly-roll fold / Immunoglobulin-like fold / Tim-barrel domain / Structural Genomics / New York SGX Research Center for Structural Genomics
Function / homology
Function and homology information


lactose catabolic process / beta-galactosidase complex / beta-galactosidase / beta-galactosidase activity / carbohydrate binding / metal ion binding
Similarity search - Function
Glycoside hydrolase, family 2, beta-galactosidase / Beta galactosidase small chain/ domain 5 / Beta-galactosidase, domain 4 / Beta galactosidase small chain / Beta-galactosidase, domain 4 / Beta galactosidase small chain / Glycoside hydrolase, family 2, conserved site / Glycosyl hydrolases family 2 signature 1. / Beta-galactosidase; Chain A, domain 5 - #10 / Glycoside hydrolase, family 2 ...Glycoside hydrolase, family 2, beta-galactosidase / Beta galactosidase small chain/ domain 5 / Beta-galactosidase, domain 4 / Beta galactosidase small chain / Beta-galactosidase, domain 4 / Beta galactosidase small chain / Glycoside hydrolase, family 2, conserved site / Glycosyl hydrolases family 2 signature 1. / Beta-galactosidase; Chain A, domain 5 - #10 / Glycoside hydrolase, family 2 / Glycoside hydrolase family 2, catalytic domain / Glycosyl hydrolases family 2, TIM barrel domain / Glycoside hydrolase, family 2, immunoglobulin-like beta-sandwich / Glycosyl hydrolases family 2, sugar binding domain / Glycosyl hydrolases family 2 / Glycosyl hydrolases family 2, sugar binding domain / Beta-Galactosidase/glucuronidase domain superfamily / Glycoside hydrolase-type carbohydrate-binding / Beta-galactosidase; Chain A, domain 5 / Galactose mutarotase-like domain superfamily / Galactose-binding domain-like / Galactose-binding-like domain superfamily / Distorted Sandwich / Glycosidases / Glycoside hydrolase superfamily / Jelly Rolls / Immunoglobulins / TIM Barrel / Alpha-Beta Barrel / Immunoglobulin-like fold / Immunoglobulin-like / Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
Biological speciesBacteroides thetaiotaomicron VPI-5482 (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / SAD / Resolution: 2.1 Å
AuthorsKumaran, D. / Burley, S.K. / Swaminathan, S. / New York SGX Research Center for Structural Genomics (NYSGXRC)
CitationJournal: To be Published
Title: Crystal structure analysis of beta-galactosidase from Bacteroides thetaiotaomicron VPI-5482.
Authors: Kumaran, D. / Burley, S.K. / Swaminathan, S.
History
DepositionNov 26, 2007Deposition site: RCSB / Processing site: RCSB
Revision 1.0Dec 11, 2007Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Feb 3, 2021Group: Database references / Derived calculations / Structure summary
Category: audit_author / citation_author ...audit_author / citation_author / pdbx_struct_conn_angle / struct_conn / struct_conn_type / struct_ref_seq_dif / struct_site
Item: _audit_author.identifier_ORCID / _citation_author.identifier_ORCID ..._audit_author.identifier_ORCID / _citation_author.identifier_ORCID / _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_conn_type.id / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Beta-galactosidase
B: Beta-galactosidase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)232,59210
Polymers232,3812
Non-polymers2118
Water20,4831137
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)88.335, 138.864, 102.818
Angle α, β, γ (deg.)90.00, 109.73, 90.00
Int Tables number4
Space group name H-MP1211

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Components

#1: Protein Beta-galactosidase /


Mass: 116190.414 Da / Num. of mol.: 2 / Fragment: Residues 24-1022
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bacteroides thetaiotaomicron VPI-5482 (bacteria)
Species: Bacteroides thetaiotaomicron / Strain: VPI-5482, DSM 2079, NCTC 10582, E50 / Gene: NP_810539.1, BT_1626 / Plasmid: pSGX3(BC) / Species (production host): Escherichia coli / Production host: Escherichia coli BL21(DE3) (bacteria) / Strain (production host): BL21(DE3) / References: UniProt: Q8A799
#2: Chemical ChemComp-MG / MAGNESIUM ION


Mass: 24.305 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Mg
#3: Chemical
ChemComp-NA / SODIUM ION


Mass: 22.990 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Na
#4: Chemical ChemComp-CL / CHLORIDE ION / Chloride


Mass: 35.453 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Cl
#5: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 1137 / 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: 2.55 Å3/Da / Density % sol: 51.85 %
Crystal growTemperature: 298 K / Method: vapor diffusion, sitting drop / pH: 6.5
Details: 0.2M Magnesium chloride, 20% PEG 3350, 0.1M Bis-tris, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 298K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: NSLS / Beamline: X29A / Wavelength: 0.979 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Nov 5, 2007 / Details: Mirrors
RadiationMonochromator: Si 111 channel / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.979 Å / Relative weight: 1
ReflectionResolution: 2.1→50 Å / Num. all: 118156 / Num. obs: 118156 / % possible obs: 86.3 % / Observed criterion σ(F): 0 / Observed criterion σ(I): 0 / Redundancy: 6.1 % / Biso Wilson estimate: 10.6 Å2 / Rmerge(I) obs: 0.084 / Net I/σ(I): 17.1
Reflection shellResolution: 2.1→2.26 Å / Redundancy: 2.4 % / Rmerge(I) obs: 0.189 / Mean I/σ(I) obs: 3 / Num. unique all: 4996 / % possible all: 37

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Processing

Software
NameVersionClassification
CNS1.1refinement
CBASSdata collection
HKL-2000data reduction
HKL-2000data scaling
SHELXDphasing
SHARPphasing
ARP/wARPmodel building
RefinementMethod to determine structure: SAD / Resolution: 2.1→49.76 Å / Rfactor Rfree error: 0.003 / Data cutoff high absF: 99687.46 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Stereochemistry target values: Engh & Huber
Details: Residues listed as missing in Remark 465 are due to lack of electron density. Residues with missing atoms listed in Remark 470 are due to lack of electron density for side chains and modeled as alanines.
RfactorNum. reflection% reflectionSelection details
Rfree0.234 5795 5 %RANDOM
Rwork0.2 ---
all0.2 115118 --
obs0.2 115118 84.7 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 34.4514 Å2 / ksol: 0.327632 e/Å3
Displacement parametersBiso mean: 24 Å2
Baniso -1Baniso -2Baniso -3
1--4.81 Å20 Å21.11 Å2
2--10.16 Å20 Å2
3----5.35 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.29 Å0.24 Å
Luzzati d res low-5 Å
Luzzati sigma a0.31 Å0.22 Å
Refinement stepCycle: LAST / Resolution: 2.1→49.76 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms16098 0 8 1137 17243
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.006
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_deg1.4
X-RAY DIFFRACTIONc_angle_deg_na
X-RAY DIFFRACTIONc_angle_deg_prot
X-RAY DIFFRACTIONc_dihedral_angle_d25.1
X-RAY DIFFRACTIONc_dihedral_angle_d_na
X-RAY DIFFRACTIONc_dihedral_angle_d_prot
X-RAY DIFFRACTIONc_improper_angle_d0.82
X-RAY DIFFRACTIONc_improper_angle_d_na
X-RAY DIFFRACTIONc_improper_angle_d_prot
X-RAY DIFFRACTIONc_mcbond_it
X-RAY DIFFRACTIONc_mcangle_it
X-RAY DIFFRACTIONc_scbond_it
X-RAY DIFFRACTIONc_scangle_it
LS refinement shellResolution: 2.1→2.23 Å / Rfactor Rfree error: 0.013 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.283 473 5 %
Rwork0.249 8910 -
obs-4490 41.6 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1protein_rep.paramprotein.top
X-RAY DIFFRACTION2carbohydrate.paramcarbohydrate.top
X-RAY DIFFRACTION3water_rep.paramwater.top
X-RAY DIFFRACTION4ion.paramion.top

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