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Basic information

Entry
Database: PDB / ID: 4za3
TitleStructural studies on a non-toxic homologue of type II RIPs from Momordica charantia (bitter gourd)-Native-3
Components(rRNA N-glycosidase) x 2
KeywordsHYDROLASE / beta-trefoil / Type II RIPs / Galactose specific lectin
Function / homology
Function and homology information


rRNA N-glycosylase / rRNA N-glycosylase activity / defense response / toxin activity / negative regulation of translation
Similarity search - Function
Ricin (A Subunit), domain 2 / Ricin (A Subunit), domain 2 / Ricin (A subunit); domain 1 / Ricin (A subunit), domain 1 / Ricin-type beta-trefoil lectin domain / Ribosome-inactivating protein type 1/2 / Ribosome-inactivating protein / Ribosome-inactivating protein, subdomain 1 / Ribosome-inactivating protein, subdomain 2 / Ribosome-inactivating protein superfamily ...Ricin (A Subunit), domain 2 / Ricin (A Subunit), domain 2 / Ricin (A subunit); domain 1 / Ricin (A subunit), domain 1 / Ricin-type beta-trefoil lectin domain / Ribosome-inactivating protein type 1/2 / Ribosome-inactivating protein / Ribosome-inactivating protein, subdomain 1 / Ribosome-inactivating protein, subdomain 2 / Ribosome-inactivating protein superfamily / Ribosome inactivating protein / Ricin-type beta-trefoil / Lectin domain of ricin B chain profile. / Ricin B, lectin domain / Ricin B-like lectins / Trefoil (Acidic Fibroblast Growth Factor, subunit A) - #50 / Trefoil (Acidic Fibroblast Growth Factor, subunit A) / Trefoil / Few Secondary Structures / Irregular / 3-Layer(aba) Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
Ribosome-inactivating protein
Similarity search - Component
Biological speciesMomordica charantia (bitter melon)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.67 Å
AuthorsChandran, T. / Sharma, A. / Vijayan, M.
Funding support India, 1items
OrganizationGrant numberCountry
Science and Engineering Research Board, Department of Science and Technology India
Citation
Journal: J.Biosci. / Year: 2015
Title: Structural studies on a non-toxic homologue of type II RIPs from bitter gourd: Molecular basis of non-toxicity, conformational selection and glycan structure.
Authors: Chandran, T. / Sharma, A. / Vijayan, M.
#1: Journal: Acta Crystallogr. F Biol. Crystallogr. / Year: 2010
Title: Crystallization and preliminary X-ray studies of a galactose-specific lectin from the seeds of bitter gourd (Momordica charantia).
Authors: Sharma, A. / Pohlentz, G. / Bobbili, K.B. / Jeyaprakash, A.A. / Chandran, T. / Mormann, M. / Swamy, M.J. / Vijayan, M.
#2: Journal: Acta Crystallogr. D Biol. Crystallogr. / Year: 2013
Title: The sequence and structure of snake gourd (Trichosanthes anguina) seed lectin, a three-chain nontoxic homologue of type II RIPs
Authors: Sharma, A. / Pohlentz, G. / Bobbili, K.B. / Jeyaprakash, A.A. / Chandran, T. / Mormann, M. / Swamy, M.J. / Vijayan, M.
History
DepositionApr 13, 2015Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Mar 23, 2016Provider: repository / Type: Initial release
Revision 1.1Sep 27, 2017Group: Data collection / Database references / Derived calculations
Category: citation / diffrn_detector / pdbx_struct_oper_list
Item: _citation.journal_id_CSD / _diffrn_detector.detector / _pdbx_struct_oper_list.symmetry_operation
Revision 1.2Oct 9, 2019Group: Data collection / Database references / Category: chem_comp / citation / Item: _chem_comp.type / _citation.pdbx_database_id_DOI
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_unobs_or_zero_occ_atoms / pdbx_validate_close_contact / struct_asym / struct_conn / 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.occupancy / _atom_site.type_symbol / _chem_comp.name / _chem_comp.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_unobs_or_zero_occ_atoms.auth_asym_id / _pdbx_unobs_or_zero_occ_atoms.auth_seq_id / _pdbx_unobs_or_zero_occ_atoms.label_asym_id / _pdbx_validate_close_contact.auth_asym_id_1 / _pdbx_validate_close_contact.auth_asym_id_2 / _pdbx_validate_close_contact.auth_seq_id_1 / _pdbx_validate_close_contact.auth_seq_id_2 / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_role / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_seq_id / _struct_conn.ptnr2_symmetry
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Nov 8, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / struct_conn
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.pdbx_leaving_atom_flag
Revision 2.2Oct 23, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: rRNA N-glycosidase
B: rRNA N-glycosidase
hetero molecules


Theoretical massNumber of molelcules
Total (without water)58,40613
Polymers56,5462
Non-polymers1,86111
Water10,269570
1


  • Idetical with deposited unit
  • defined by software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area6530 Å2
ΔGint19 kcal/mol
Surface area20920 Å2
MethodPISA
Unit cell
Length a, b, c (Å)141.400, 119.590, 44.860
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number18
Space group name H-MP21212
DetailsThe symmetry related halves are covalently linked through a disulphide bridge. Therefore, the whole molecule is formally a monomer.

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Components

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Protein , 2 types, 2 molecules AB

#1: Protein rRNA N-glycosidase


Mass: 27642.234 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 24-270 / Source method: isolated from a natural source / Source: (natural) Momordica charantia (bitter melon) / References: UniProt: B7X8M2, rRNA N-glycosylase
#2: Protein rRNA N-glycosidase


Mass: 28903.309 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 288-547 / Source method: isolated from a natural source / Source: (natural) Momordica charantia (bitter melon) / References: UniProt: B7X8M2, rRNA N-glycosylase

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Sugars , 4 types, 4 molecules

#3: Polysaccharide alpha-L-fucopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 367.349 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
LFucpa1-3DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,2,1/[a2122h-1b_1-5_2*NCC/3=O][a1221m-1a_1-5]/1-2/a3-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(3+1)][a-L-Fucp]{}}}LINUCSPDB-CARE
#4: Polysaccharide beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 383.349 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,2,1/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-2/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-Manp]{}}LINUCSPDB-CARE
#5: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}}LINUCSPDB-CARE
#7: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 3 types, 577 molecules

#6: Chemical
ChemComp-EDO / 1,2-ETHANEDIOL / ETHYLENE GLYCOL


Mass: 62.068 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C2H6O2
#8: Chemical ChemComp-GOL / GLYCEROL / GLYCERIN / PROPANE-1,2,3-TRIOL


Mass: 92.094 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C3H8O3
#9: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 570 / Source method: isolated from a natural source / Formula: H2O

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Details

Has protein modificationY

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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: 3.16 Å3/Da / Density % sol: 61.11 % / Description: orthorhombic
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 7.3 / Details: 0.1M HEPES, 25% w/v PEG 10000

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: ESRF / Beamline: BM14 / Wavelength: 0.95 Å
DetectorType: MARMOSAIC 225 mm CCD / Detector: CCD / Date: Jul 6, 2013
RadiationMonochromator: Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.95 Å / Relative weight: 1
ReflectionRedundancy: 6.4 % / Number: 568970 / Rsym value: 0.07 / D res high: 1.674 Å / D res low: 32.495 Å / Num. obs: 88689 / % possible obs: 100
Diffraction reflection shell
Highest resolution (Å)Lowest resolution (Å)IDRmerge(I) obsRsym valueRedundancy
5.2932.4910.0280.0286
3.745.2910.0550.0556.4
3.063.7410.0660.0666.5
2.653.0610.0550.0556.5
2.372.6510.0650.0656.5
2.162.3710.0830.0836.5
22.1610.1010.1016.5
1.87210.1460.1466.5
1.761.8710.2240.2246.5
1.671.7610.3460.3466.1
ReflectionResolution: 1.67→32.5 Å / Num. obs: 88689 / % possible obs: 100 % / Redundancy: 6.4 % / Biso Wilson estimate: 15.8 Å2 / Rmerge(I) obs: 0.07 / Rsym value: 0.07 / Net I/σ(I): 15.6
Reflection shellResolution: 1.67→1.76 Å / Redundancy: 6.1 % / Rmerge(I) obs: 0.346 / Mean I/σ(I) obs: 2.2 / Rsym value: 0.346 / % possible all: 100

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Processing

Software
NameVersionClassification
REFMAC5.8.0107refinement
MOSFLMdata collection
SCALA3.3.20data scaling
PDB_EXTRACT3.15data extraction
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 4Z8S

4z8s


Resolution: 1.67→32.5 Å / Cor.coef. Fo:Fc: 0.966 / Cor.coef. Fo:Fc free: 0.956 / SU B: 1.42 / SU ML: 0.047 / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.074 / ESU R Free: 0.074 / Stereochemistry target values: MAXIMUM LIKELIHOOD / Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING
RfactorNum. reflection% reflectionSelection details
Rfree0.183 4369 5 %RANDOM
Rwork0.16 ---
obs0.161 82678 98.2 %-
Solvent computationIon probe radii: 0.8 Å / Shrinkage radii: 0.8 Å / VDW probe radii: 1.2 Å / Solvent model: MASK
Displacement parametersBiso mean: 20.52 Å2
Baniso -1Baniso -2Baniso -3
1-1.51 Å20 Å20 Å2
2---1.15 Å20 Å2
3----0.36 Å2
Refinement stepCycle: LAST / Resolution: 1.67→32.5 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3935 0 121 570 4626
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
X-RAY DIFFRACTIONr_bond_refined_d0.0120.024155
X-RAY DIFFRACTIONr_bond_other_d0.0020.023833
X-RAY DIFFRACTIONr_angle_refined_deg1.6291.9675635
X-RAY DIFFRACTIONr_angle_other_deg1.22638812
X-RAY DIFFRACTIONr_dihedral_angle_1_deg6.5185505
X-RAY DIFFRACTIONr_dihedral_angle_2_deg32.40225.134187
X-RAY DIFFRACTIONr_dihedral_angle_3_deg10.86115661
X-RAY DIFFRACTIONr_dihedral_angle_4_deg16.171517
X-RAY DIFFRACTIONr_chiral_restr0.1570.2653
X-RAY DIFFRACTIONr_gen_planes_refined0.0070.024690
X-RAY DIFFRACTIONr_gen_planes_other0.0010.02955
X-RAY DIFFRACTIONr_nbd_refined
X-RAY DIFFRACTIONr_nbd_other
X-RAY DIFFRACTIONr_nbtor_refined
X-RAY DIFFRACTIONr_nbtor_other
X-RAY DIFFRACTIONr_xyhbond_nbd_refined
X-RAY DIFFRACTIONr_xyhbond_nbd_other
X-RAY DIFFRACTIONr_metal_ion_refined
X-RAY DIFFRACTIONr_metal_ion_other
X-RAY DIFFRACTIONr_symmetry_vdw_refined
X-RAY DIFFRACTIONr_symmetry_vdw_other
X-RAY DIFFRACTIONr_symmetry_hbond_refined
X-RAY DIFFRACTIONr_symmetry_hbond_other
X-RAY DIFFRACTIONr_symmetry_metal_ion_refined
X-RAY DIFFRACTIONr_symmetry_metal_ion_other
X-RAY DIFFRACTIONr_mcbond_it1.2891.7722026
X-RAY DIFFRACTIONr_mcbond_other1.2881.7732025
X-RAY DIFFRACTIONr_mcangle_it2.032.6542529
X-RAY DIFFRACTIONr_mcangle_other
X-RAY DIFFRACTIONr_scbond_it
X-RAY DIFFRACTIONr_scbond_other
X-RAY DIFFRACTIONr_scangle_it
X-RAY DIFFRACTIONr_scangle_other
X-RAY DIFFRACTIONr_long_range_B_refined
X-RAY DIFFRACTIONr_long_range_B_other
X-RAY DIFFRACTIONr_rigid_bond_restr
X-RAY DIFFRACTIONr_sphericity_free
X-RAY DIFFRACTIONr_sphericity_bonded
LS refinement shellResolution: 1.67→1.72 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0.24 308 -
Rwork0.231 5720 -
obs--93.21 %

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