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- PDB-2dvg: Crystal structure of peanut lectin GAL-ALPHA-1,6-GLC complex -

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Basic information

Entry
Database: PDB / ID: 2dvg
TitleCrystal structure of peanut lectin GAL-ALPHA-1,6-GLC complex
ComponentsGalactose-binding lectin
KeywordsSUGAR BINDING PROTEIN / LEGUME LECTIN / AGGLUTININ / OPEN QUATERNARY STRUCTURE / CARBOHYDRATE SPECIFICITY
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 domain / Legume lectin, beta chain, Mn/Ca-binding site / : / Jelly Rolls - #200 / Concanavalin A-like lectin/glucanase domain superfamily ...Legume lectin / Legume lectin, alpha chain, conserved site / Legume lectins alpha-chain signature. / Legume lectins beta-chain signature. / Legume lectin domain / Legume lectin domain / Legume lectin, beta chain, Mn/Ca-binding site / : / Jelly Rolls - #200 / Concanavalin A-like lectin/glucanase domain superfamily / Jelly Rolls / Sandwich / Mainly Beta
Similarity search - Domain/homology
alpha-D-galactopyranose / : / Galactose-binding lectin
Similarity search - Component
Biological speciesArachis hypogaea (peanut)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.78 Å
AuthorsNatchiar, S.K. / Srinivas, O. / Mitra, N. / Surolia, A. / Jayaraman, N. / Vijayan, M.
Citation
Journal: ACTA CRYSTALLOGR.,SECT.D / Year: 2006
Title: Structural studies on peanut lectin complexed with disaccharides involving different linkages: further insights into the structure and interactions of the lectin
Authors: Natchiar, S.K. / Srinivas, O. / Mitra, N. / Surolia, A. / Jayaraman, N. / Vijayan, M.
#1: 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.
#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: 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.
#4: Journal: ACTA CRYSTALLOGR.,SECT.D / Year: 2004
Title: Structural plasticity of peanut lectin: an X-ray analysis involving variation in pH, ligand binding and crystal structure
Authors: Natchiar, S.K. / Jeyaprakash, A.A. / Ramya, T.N. / Thomas, C.J. / Suguna, K. / Surolia, A. / Vijayan, M.
#5: Journal: Curr.Sci. / Year: 2006
Title: Multivalency in Lectins. A Crystallographic Modellin and Light-Scattering Study Involving Peanut Lectin and a Bivalent Ligand
Authors: Natchiar, S.K. / Srinivas, O. / Nivedita, M. / Sagarika, D. / Jayaraman, N. / Surolia, A. / Vijayan, M.
History
DepositionJul 31, 2006Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Nov 7, 2006Provider: repository / Type: Initial release
Revision 1.1Apr 30, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Version format compliance
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / 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 / pdbx_struct_conn_angle / pdbx_unobs_or_zero_occ_atoms / struct_asym / struct_conn / struct_conn_type / 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 / _entity.formula_weight / _entity.pdbx_description / _entity.pdbx_number_of_molecules / _entity.src_method / _entity.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_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_type.id
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Oct 25, 2023Group: Advisory / Data collection ...Advisory / 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 / pdbx_unobs_or_zero_occ_atoms
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: Galactose-binding lectin
B: Galactose-binding lectin
C: Galactose-binding lectin
D: Galactose-binding lectin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)102,29118
Polymers100,8364
Non-polymers1,45514
Water8,395466
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area9070 Å2
ΔGint-122 kcal/mol
Surface area32510 Å2
MethodPISA
Unit cell
Length a, b, c (Å)126.190, 124.660, 75.740
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Space group name H-MP21212
DetailsBiological unit is a tetramer. Asymmetric unit contains one biological unit.

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Components

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Protein , 1 types, 4 molecules ABCD

#1: Protein
Galactose-binding lectin / AGGLUTININ / PNA


Mass: 25208.955 Da / Num. of mol.: 4 / Fragment: residues 1-236 / Source method: isolated from a natural source / Source: (natural) Arachis hypogaea (peanut) / References: UniProt: P02872

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Sugars , 2 types, 4 molecules

#2: Polysaccharide alpha-D-galactopyranose-(1-6)-beta-D-glucopyranose


Type: oligosaccharide / Mass: 342.297 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGalpa1-6DGlcpb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,2,1/[a2122h-1b_1-5][a2112h-1a_1-5]/1-2/a6-b1WURCSPDB2Glycan 1.1.0
[][b-D-Glcp]{[(6+1)][a-D-Galp]{}}LINUCSPDB-CARE
#3: Sugar ChemComp-GLA / alpha-D-galactopyranose / alpha-D-galactose / D-galactose / galactose / ALPHA D-GALACTOSE


Type: D-saccharide, alpha linking / Mass: 180.156 Da / Num. of mol.: 3
Source method: isolated from a genetically manipulated source
Formula: C6H12O6
IdentifierTypeProgram
DGalpaCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
a-D-galactopyranoseCOMMON NAMEGMML 1.0
a-D-GalpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GalSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 4 types, 476 molecules

#4: Chemical
ChemComp-CA / CALCIUM ION


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


Mass: 54.938 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: Mn
#6: Chemical ChemComp-SO4 / SULFATE ION


Mass: 96.063 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: SO4
#7: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 466 / 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: 2.7 Å3/Da / Density % sol: 54.2 %
Crystal growTemperature: 288 K / Method: vapor diffusion, hanging drop / pH: 6.5
Details: 7.5% PEG 8000, 0.025M Sodium cadodylate, 0.5M ammonium sulfate, pH 6.5, VAPOR DIFFUSION, HANGING DROP, temperature 288K

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418 Å
DetectorType: MAR scanner 345 mm plate / Detector: IMAGE PLATE
RadiationMonochromator: Osmic mirror / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.78→20 Å / Num. obs: 29220 / % possible obs: 95.2 % / Redundancy: 5.3 % / Biso Wilson estimate: 55.8 Å2 / Rmerge(I) obs: 0.167 / Rsym value: 0.185 / Net I/σ(I): 8.8
Reflection shellResolution: 2.74→2.78 Å / Redundancy: 5.3 % / Rmerge(I) obs: 0.498 / Mean I/σ(I) obs: 4.5 / Num. unique all: 2865 / Rsym value: 0.556 / % possible all: 95.1

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Processing

Software
NameVersionClassification
CNS1.1refinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 2PEL

2pel


Resolution: 2.78→19.93 Å / Rfactor Rfree error: 0.007 / Data cutoff high absF: 2049486.95 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Details: MLF TARGET
RfactorNum. reflection% reflectionSelection details
Rfree0.274 1514 5 %RANDOM
Rwork0.198 ---
obs0.198 28594 98.2 %-
all-29220 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 46.016 Å2 / ksol: 0.324288 e/Å3
Displacement parametersBiso mean: 32.7 Å2
Baniso -1Baniso -2Baniso -3
1-14.19 Å20 Å20 Å2
2---7.6 Å20 Å2
3----6.59 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.45 Å0.3 Å
Luzzati d res low-5 Å
Luzzati sigma a0.51 Å0.37 Å
Refinement stepCycle: LAST / Resolution: 2.78→19.93 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6972 0 77 466 7515
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.006
X-RAY DIFFRACTIONc_angle_deg1.4
X-RAY DIFFRACTIONc_dihedral_angle_d25.9
X-RAY DIFFRACTIONc_improper_angle_d1.89
X-RAY DIFFRACTIONc_mcbond_it8.21.5
X-RAY DIFFRACTIONc_mcangle_it11.992
X-RAY DIFFRACTIONc_scbond_it8.762
X-RAY DIFFRACTIONc_scangle_it12.742.5
LS refinement shellResolution: 2.78→2.95 Å / Rfactor Rfree error: 0.022 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.349 253 5.2 %
Rwork0.275 4616 -
obs--97 %

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