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- PDB-1qf3: PEANUT LECTIN COMPLEXED WITH METHYL-BETA-GALACTOSE -

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Basic information

Entry
Database: PDB / ID: 1qf3
TitlePEANUT LECTIN COMPLEXED WITH METHYL-BETA-GALACTOSE
ComponentsPROTEIN (PEANUT LECTIN)
KeywordsSUGAR BINDING PROTEIN / LECTIN / LEGUME LECTIN / WATER BRIDGES / CARBOHYDRATE SPECIFICITY / METHYL-BETA- GALACTOSE
Function / homology
Function and homology information


carbohydrate binding / metal ion binding
Similarity search - Function
Legume lectin / Legume lectin, alpha chain, conserved site / Legume lectins alpha-chain signature. / Legume lectins beta-chain signature. / Legume lectin domain / Legume lectin, beta chain, Mn/Ca-binding site / Legume lectin domain / Jelly Rolls - #200 / Concanavalin A-like lectin/glucanase domain superfamily / Jelly Rolls ...Legume lectin / Legume lectin, alpha chain, conserved site / Legume lectins alpha-chain signature. / Legume lectins beta-chain signature. / Legume lectin domain / Legume lectin, beta chain, Mn/Ca-binding site / Legume lectin domain / Jelly Rolls - #200 / Concanavalin A-like lectin/glucanase domain superfamily / Jelly Rolls / Sandwich / Mainly Beta
Similarity search - Domain/homology
methyl beta-D-galactopyranoside / : / Galactose-binding lectin
Similarity search - Component
Biological speciesArachis hypogaea (peanut)
MethodX-RAY DIFFRACTION / OTHER / Resolution: 2.8 Å
AuthorsRavishankar, R. / Suguna, K. / Surolia, A. / Vijayan, M.
Citation
Journal: Acta Crystallogr.,Sect.D / Year: 1999
Title: Structures of the complexes of peanut lectin with methyl-beta-galactose and N-acetyllactosamine and a comparative study of carbohydrate binding in Gal/GalNAc-specific legume lectins.
Authors: Ravishankar, R. / Suguna, K. / Surolia, A. / Vijayan, M.
#1: Journal: Curr.Sci. / Year: 1997
Title: The Specificity of Peanut Agglutinin for Thomsen-Friedenreich Antigen is Mediated by Water-Bridges
Authors: Ravishankar, R. / Ravindran, M. / Suguna, K. / Surolia, A. / Vijayan, M.
#2: Journal: J.Mol.Biol. / Year: 1996
Title: Conformation, protein-carbohydrate interactions and a novel subunit association in the refined structure of peanut lectin-lactose complex.
Authors: Banerjee, R. / Das, K. / Ravishankar, R. / Suguna, K. / Surolia, A. / Vijayan, M.
#3: Journal: Proc.Natl.Acad.Sci.USA / Year: 1994
Title: Crystal structure of peanut lectin, a protein with an unusual quaternary structure.
Authors: Banerjee, R. / Mande, S.C. / Ganesh, V. / Das, K. / Dhanaraj, V. / Mahanta, S.K. / Suguna, K. / Surolia, A. / Vijayan, M.
History
DepositionApr 6, 1999Deposition site: PDBE / Processing site: RCSB
Revision 1.0Jul 27, 1999Provider: repository / Type: Initial release
Revision 1.1Apr 26, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 1.3Nov 27, 2019Group: Database references / Category: citation
Item: _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.4Jul 29, 2020Group: Data collection / Derived calculations / Structure summary
Category: chem_comp / entity ...chem_comp / entity / pdbx_chem_comp_identifier / pdbx_entity_nonpoly / pdbx_struct_conn_angle / struct_conn / struct_site / struct_site_gen
Item: _chem_comp.mon_nstd_flag / _chem_comp.name ..._chem_comp.mon_nstd_flag / _chem_comp.name / _chem_comp.type / _entity.pdbx_description / _pdbx_entity_nonpoly.name / _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.pdbx_dist_value / _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_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
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 1.5Dec 27, 2023Group: Data collection / Database references / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.6Apr 3, 2024Group: Refinement description / Category: pdbx_initial_refinement_model

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: PROTEIN (PEANUT LECTIN)
B: PROTEIN (PEANUT LECTIN)
C: PROTEIN (PEANUT LECTIN)
D: PROTEIN (PEANUT LECTIN)
hetero molecules


Theoretical massNumber of molelcules
Total (without water)101,99316
Polymers100,8364
Non-polymers1,15712
Water6,720373
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)128.953, 126.683, 77.284
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Space group name H-MP21212
Noncrystallographic symmetry (NCS)NCS oper:
IDCodeMatrixVector
1given(-0.996954, -0.072618, -0.028465), (-0.077814, 0.951013, 0.299196), (0.005343, 0.3005, -0.953767)62.3857, -7.7703, 65.7472
2given(0.488143, 0.23612, 0.840216), (-0.355893, -0.825179, 0.438658), (0.796905, -0.513155, -0.318772)10.3769, 11.6619, 29.9279
3given(-0.456008, -0.14598, -0.877922), (-0.143388, -0.961517, 0.234359), (-0.878349, 0.232753, 0.417527)95.519, 1.14, 59.2078

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Components

#1: Protein
PROTEIN (PEANUT LECTIN) / PEANUT AGGLUTININ-C-LACTOSE COMPLEX


Mass: 25208.955 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) Arachis hypogaea (peanut) / References: UniProt: P02872
#2: Sugar
ChemComp-MBG / methyl beta-D-galactopyranoside / METHYL-BETA-GALACTOSE / methyl beta-D-galactoside / methyl D-galactoside / methyl galactoside


Type: D-saccharide / Mass: 194.182 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C7H14O6
IdentifierTypeProgram
DGalp[1Me]bCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
1-methyl-b-D-galactopyranoseCOMMON NAMEGMML 1.0
b-methyl-galactosideIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
#3: Chemical
ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Ca
#4: Chemical
ChemComp-MN / MANGANESE (II) ION


Mass: 54.938 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mn
#5: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 373 / 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: 3.13 Å3/Da / Density % sol: 60.69 %
Crystal growMethod: vapor diffusion, hanging drop / pH: 7
Details: HANGING DROP OF 5 MG/ML PROTEIN IN 0.05 M SODIUM PHOSPHATE BUFFER,PH 7.0, CONTAINING 0.2M SODIUM CHLORIDE, 0.02 % SODIUM AZIDE, 1.5-10MM METHYL-BETA- GALACTOSE AND 12% (W/V) PEG 8000 IN THE ...Details: HANGING DROP OF 5 MG/ML PROTEIN IN 0.05 M SODIUM PHOSPHATE BUFFER,PH 7.0, CONTAINING 0.2M SODIUM CHLORIDE, 0.02 % SODIUM AZIDE, 1.5-10MM METHYL-BETA- GALACTOSE AND 12% (W/V) PEG 8000 IN THE SAME BUFFER, VAPOR DIFFUSION, HANGING DROP
Crystal grow
*PLUS
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
15 mg/mlprotein1drop
20.05 Msodium phosphate1drop
30.2 M1dropNaCl
40.02 %sodium azide1drop
51.5-10 mMsugar1drop
612 %(w/v)PEG80001drop
740 %(w/v)PEG80001reservoir
80.2 M1reservoirNaCl
90.02 %sodium azide1reservoir
101.5-10 mMsugar1reservoir
110.05 Msodium phosphate1reservoir

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Data collection

DiffractionMean temperature: 293 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418
DetectorType: MARRESEARCH / Detector: IMAGE PLATE / Details: MIRROR
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.8→99 Å / Num. obs: 31250 / % possible obs: 96.5 % / Redundancy: 18.3 % / Biso Wilson estimate: 19.2 Å2 / Rmerge(I) obs: 0.128
Reflection
*PLUS
Num. measured all: 573611

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Processing

Software
NameVersionClassification
X-PLOR3.1model building
X-PLOR3.1refinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLOR3.1phasing
RefinementMethod to determine structure: OTHER
Starting model: PDB2PEL.ENT WITHOUT SUGAR AND WATER

Resolution: 2.8→10 Å / Rfactor Rfree error: 0.007 / Data cutoff high absF: 10000000 / Data cutoff low absF: 0.001 / Isotropic thermal model: GROUP / Cross valid method: THROUGHOUT / σ(F): 0
Details: THERE IS A TETRAMER IN THE ASYMMETRIC UNIT WITHOUT 222 OR FOUR-FOLD SYMMETRY.
RfactorNum. reflection% reflectionSelection details
Rfree0.247 1223 4 %RANDOM
Rwork0.195 ---
obs-30493 98 %-
Displacement parametersBiso mean: 19.5 Å2
Baniso -1Baniso -2Baniso -3
1-0 Å20 Å20 Å2
2--0 Å20 Å2
3---0 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.34 Å0.26 Å
Luzzati d res low-10 Å
Luzzati sigma a0.34 Å0.26 Å
Refinement stepCycle: LAST / Resolution: 2.8→10 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6973 0 60 373 7406
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.008
X-RAY DIFFRACTIONx_bond_d_na
X-RAY DIFFRACTIONx_bond_d_prot
X-RAY DIFFRACTIONx_angle_d
X-RAY DIFFRACTIONx_angle_d_na
X-RAY DIFFRACTIONx_angle_d_prot
X-RAY DIFFRACTIONx_angle_deg1.5
X-RAY DIFFRACTIONx_angle_deg_na
X-RAY DIFFRACTIONx_angle_deg_prot
X-RAY DIFFRACTIONx_dihedral_angle_d27.6
X-RAY DIFFRACTIONx_dihedral_angle_d_na
X-RAY DIFFRACTIONx_dihedral_angle_d_prot
X-RAY DIFFRACTIONx_improper_angle_d1.21
X-RAY DIFFRACTIONx_improper_angle_d_na
X-RAY DIFFRACTIONx_improper_angle_d_prot
X-RAY DIFFRACTIONx_mcbond_it
X-RAY DIFFRACTIONx_mcangle_it
X-RAY DIFFRACTIONx_scbond_it
X-RAY DIFFRACTIONx_scangle_it
LS refinement shellResolution: 2.8→2.97 Å / Rfactor Rfree error: 0.025 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.34 181 3.7 %
Rwork0.261 4682 -
obs--95.1 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PARHCSDX.PROTOPHCSDX.PRO
X-RAY DIFFRACTION2WAT.PARWAT.TOP
X-RAY DIFFRACTION3PARAM1.CHOTOPH1.CHO
Software
*PLUS
Name: X-PLOR / Version: 3.1 / Classification: refinement
Refinement
*PLUS
σ(F): 0 / % reflection Rfree: 4 % / Rfactor obs: 0.195
Solvent computation
*PLUS
Displacement parameters
*PLUS
Biso mean: 19.5 Å2
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONx_bond_d0.008
X-RAY DIFFRACTIONx_angle_deg1.5
X-RAY DIFFRACTIONx_dihedral_angle_d
X-RAY DIFFRACTIONx_dihedral_angle_deg27.6
X-RAY DIFFRACTIONx_improper_angle_d
X-RAY DIFFRACTIONx_improper_angle_deg1.21
LS refinement shell
*PLUS
Rfactor Rfree: 0.34 / % reflection Rfree: 3.7 % / Rfactor Rwork: 0.261

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