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- PDB-1v6k: Peanut lectin-lactose complex in the presence of peptide(IWSSAGNVA) -

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Basic information

Entry
Database: PDB / ID: 1v6k
TitlePeanut lectin-lactose complex in the presence of peptide(IWSSAGNVA)
ComponentsGalactose-binding lectin
KeywordsSUGAR BINDING PROTEIN / Lectin / open quaternary association / orthorhombic / carbohydrate specificity / protein crystallography / agglutinin
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 ...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
alpha-lactose / : / Galactose-binding lectin
Similarity search - Component
Biological speciesArachis hypogaea (peanut)
MethodX-RAY DIFFRACTION / Isomorphous replacement / Resolution: 2.4 Å
AuthorsKundhavai Natchiar, S. / Arockia Jeyaprakash, A. / Ramya, T.N.C. / Thomas, C.J. / Suguna, K. / Surolia, A. / Vijayan, M.
Citation
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: Kundhavai Natchiar, S. / Arockia Jeyaprakash, A. / Ramya, T.N. / Thomas, C.J. / Suguna, K. / Surolia, A. / Vijayan, M.
#1: 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.
#2: Journal: PROTEINS: STRUCT.,FUNCT.,GENET. / Year: 2001
Title: Crystal structures of the peanut lectin-lactose complex at acidic pH: retention of unusual quaternary structure, empty and carbohydrate bound combining sites, molecular mimicry and crystal ...Title: Crystal structures of the peanut lectin-lactose complex at acidic pH: retention of unusual quaternary structure, empty and carbohydrate bound combining sites, molecular mimicry and crystal packing directed by interactions at the combining site
Authors: Ravishankar, R. / Thomas, C.J. / Suguna, K. / Surolia, A. / Vijayan, M.
History
DepositionDec 1, 2003Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Feb 10, 2004Provider: repository / Type: Initial release
Revision 1.1Apr 27, 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 / entity_name_com / 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_molecule_features / pdbx_nonpoly_scheme / pdbx_struct_assembly_gen / pdbx_struct_conn_angle / pdbx_validate_close_contact / 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 / _pdbx_struct_assembly_gen.asym_id_list / _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 / _pdbx_validate_close_contact.auth_asym_id_2 / _pdbx_validate_close_contact.auth_seq_id_2 / _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
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Dec 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

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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)100,57516
Polymers98,8264
Non-polymers1,74912
Water7,188399
1


  • Idetical with deposited unit
  • defined by author
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Unit cell
Length a, b, c (Å)128.03, 124.03, 75.71
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Space group name H-MP21212

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Components

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


Mass: 24706.385 Da / Num. of mol.: 4 / Source method: isolated from a natural source / Source: (natural) Arachis hypogaea (peanut) / Tissue: seed / References: UniProt: P02872
#2: Polysaccharide
beta-D-galactopyranose-(1-4)-alpha-D-glucopyranose / alpha-lactose


Type: oligosaccharide, Oligosaccharide / Class: Nutrient / Mass: 342.297 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Details: oligosaccharide / References: alpha-lactose
DescriptorTypeProgram
DGalpb1-4DGlcpa1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,2,1/[a2122h-1a_1-5][a2112h-1b_1-5]/1-2/a4-b1WURCSPDB2Glycan 1.1.0
[][a-D-Glcp]{[(4+1)][b-D-Galp]{}}LINUCSPDB-CARE
#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.: 399 / 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: 3.03 Å3/Da / Density % sol: 59.14 %
Crystal growTemperature: 293 K / Method: hanging drop method / pH: 4.6
Details: PEG 8000, 0.2M calcium acetate, 0.1M cacodylate pH 6.5, pH 4.6, Hanging drop method, temperature 293K
Crystal grow
*PLUS
Method: vapor diffusion, hanging drop
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
14.2 mg/mlprotein1drop
20.05 Msodium acetate1drop
30.2 M1dropNaCl
40.05 %sodium azide1drop
52.1 mMlactose1drop
612 %PEG80001reservoir

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Data collection

DiffractionMean temperature: 293 K
Diffraction sourceSource: ROTATING ANODE / Type: RIGAKU RU200 / Wavelength: 1.5418 Å
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: 2.4→20 Å / Num. all: 48081 / Num. obs: 46230 / Redundancy: 4.1 % / Rmerge(I) obs: 0.119
Reflection shellResolution: 2.4→2.42 Å / Redundancy: 4.1 % / Rmerge(I) obs: 0.584 / Num. unique all: 304
Reflection
*PLUS
% possible obs: 96.4 % / Num. measured all: 190413
Reflection shell
*PLUS
% possible obs: 95.3 % / Num. unique obs: 2267 / Num. measured obs: 9336

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Processing

Software
NameVersionClassification
CNS1.1refinement
DENZOdata reduction
SCALEPACKdata scaling
RefinementMethod to determine structure: Isomorphous replacement / Resolution: 2.4→20 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 521598.37 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.219 2530 6 %RANDOM
Rwork0.177 ---
obs0.177 42158 96.4 %-
Solvent computationSolvent model: FLAT MODEL / Bsol: 31.455 Å2 / ksol: 0.31938 e/Å3
Displacement parametersBiso mean: 27.2 Å2
Baniso -1Baniso -2Baniso -3
1-3.93 Å20 Å20 Å2
2--0.49 Å20 Å2
3----4.43 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.31 Å0.25 Å
Luzzati d res low-5 Å
Luzzati sigma a0.36 Å0.32 Å
Refinement stepCycle: LAST / Resolution: 2.4→20 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6976 0 100 399 7475
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.009
X-RAY DIFFRACTIONc_angle_deg1.9
X-RAY DIFFRACTIONc_dihedral_angle_d26.6
X-RAY DIFFRACTIONc_improper_angle_d0.93
X-RAY DIFFRACTIONc_mcbond_it2.211.5
X-RAY DIFFRACTIONc_mcangle_it3.532
X-RAY DIFFRACTIONc_scbond_it1.912
X-RAY DIFFRACTIONc_scangle_it2.762.5
LS refinement shellResolution: 2.4→2.55 Å / Rfactor Rfree error: 0.015 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.305 400 6.2 %
Rwork0.268 6092 -
obs--82.2 %
Xplor file
Refine-IDSerial noParam file
X-RAY DIFFRACTION1PROTEIN_REP.PARAM
X-RAY DIFFRACTION2ION.PARAM
X-RAY DIFFRACTION3WATER_REP.PARAM
X-RAY DIFFRACTION4CARBOHYDRATE.PARAM
X-RAY DIFFRACTION5CIS1.PARAM
Refinement
*PLUS
Lowest resolution: 20 Å
Solvent computation
*PLUS
Displacement parameters
*PLUS
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg26.6
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg0.93

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