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- PDB-2dva: Crystal structure of peanut lectin GAL-BETA-1,3-GALNAC-ALPHA-O-ME... -

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Basic information

Entry
Database: PDB / ID: 2dva
TitleCrystal structure of peanut lectin GAL-BETA-1,3-GALNAC-ALPHA-O-ME (Methyl-T-antigen) 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
Legume lectin, alpha chain, conserved site / Legume lectin domain / Concanavalin A-like lectin/glucanase domain superfamily / Legume lectin / Legume lectin, beta chain, Mn/Ca-binding site / Legume lectin domain / Legume lectins beta-chain signature. / Legume lectins alpha-chain signature.
Galactose-binding lectin
Biological speciesArachis hypogaea (peanut)
MethodX-RAY DIFFRACTION / MOLECULAR REPLACEMENT / Resolution: 2.2 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.
Validation Report
SummaryFull reportAbout validation report
History
DepositionJul 30, 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

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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)103,07022
Polymers100,8364
Non-polymers2,23418
Water18,1771009
1


TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area10330 Å2
ΔGint-117 kcal/mol
Surface area32610 Å2
MethodPISA
Unit cell
γ
α
β
Length a, b, c (Å)126.59, 124.62, 75.78
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Space group name H-MP21212
DetailsBiological Molecule is a tetramer. Asymmetric unit contains one biological molecule.

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Components

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Protein/peptide , 1 types, 4 molecules ABCD

#1: Protein/peptide
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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Non-polymers , 6 types, 1027 molecules

#2: Chemical
ChemComp-GAL / BETA-D-GALACTOSE


Mass: 180.156 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Formula: C6H12O6 / Galactose
#3: Chemical
ChemComp-MGC / ALPHA-METHYL-N-ACETYL-D-GALACTOSAMINE


Mass: 235.234 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
Formula: C9H17NO6
#4: Chemical
ChemComp-CA / CALCIUM ION


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


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


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


Mass: 18.015 Da / Num. of mol.: 1009 / Source method: isolated from a natural source / Formula: H2O / Water

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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: 54.4 %
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 / Details: MIRROR
RadiationMonochromator: OSMIC MIRROR / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.5418 Å / Relative weight: 1
ReflectionResolution: 2.2→20 Å / Num. all: 61874 / Num. obs: 60730 / % possible obs: 98.8 % / Redundancy: 8.4 % / Biso Wilson estimate: 29.2 Å2 / Rmerge(I) obs: 0.092 / Rsym value: 0.098 / Net I/σ(I): 12.4
Reflection shellResolution: 2.2→2.28 Å / Redundancy: 8.2 % / Rmerge(I) obs: 0.494 / Mean I/σ(I) obs: 4.7 / Num. unique all: 6059 / Rsym value: 0.526 / % possible all: 99.8

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Processing

Software
NameVersionClassification
CNS1.1refinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 2PEL
Resolution: 2.2→19.94 Å / Rfactor Rfree error: 0.004 / Data cutoff high absF: 2123335.37 / Data cutoff low absF: 0 / Isotropic thermal model: RESTRAINED / Cross valid method: THROUGHOUT / σ(F): 0 / Details: MLF TARGET
RfactorNum. reflection% reflectionSelection details
Rfree0.25 3043 5 %RANDOM
Rwork0.197 ---
Obs0.197 60730 98.8 %-
All-57687 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 71.7497 Å2 / ksol: 0.300578 e/Å3
Displacement parametersBiso mean: 35.8 Å2
Baniso -1Baniso -2Baniso -3
1-12.81 Å20 Å20 Å2
2---9.63 Å20 Å2
3----3.18 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.32 Å0.24 Å
Luzzati d res low-5 Å
Luzzati sigma a0.26 Å0.2 Å
Refinement stepCycle: LAST / Resolution: 2.2→19.94 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6972 0 126 1009 8107
Refine LS restraints

Refinement-ID: X-RAY DIFFRACTION

TypeDev idealDev ideal target
c_bond_d0.006
c_angle_deg1.4
c_dihedral_angle_d27.3
c_improper_angle_d0.75
c_mcbond_it1.291.5
c_mcangle_it2.022
c_scbond_it1.952
c_scangle_it2.642.5
LS refinement shellResolution: 2.2→2.34 Å / Rfactor Rfree error: 0.013 / Total num. of bins used: 6
RfactorNum. reflection% reflection
Rfree0.293 524 5.2 %
Rwork0.239 9568 -
Obs--99.7 %

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