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- PDB-4zbv: Structural studies on a non-toxic homologue of type II RIPs from ... -

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Basic information

Entry
Database: PDB / ID: 4zbv
TitleStructural studies on a non-toxic homologue of type II RIPs from Momordica charantia (bitter gourd) in complex with benzyl T-antigen
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
2-acetamido-2-deoxy-alpha-D-galactopyranose / beta-D-mannopyranose / beta-D-galactopyranose / TOLUENE / TRIETHYLENE GLYCOL / PHOSPHATE ION / Ribosome-inactivating protein
Similarity search - Component
Biological speciesMomordica charantia (bitter melon)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / molecular replacement / Resolution: 2 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 15, 2015Deposition site: RCSB / Processing site: PDBJ
Revision 1.0Mar 23, 2016Provider: repository / Type: Initial release
Revision 1.1Oct 9, 2019Group: Data collection / Database references / Derived calculations
Category: chem_comp / citation / pdbx_struct_oper_list
Item: _chem_comp.type / _citation.journal_id_CSD ..._chem_comp.type / _citation.journal_id_CSD / _citation.pdbx_database_id_DOI / _pdbx_struct_oper_list.symmetry_operation
Revision 1.2Nov 20, 2019Group: Data collection / Category: reflns_shell
Item: _reflns_shell.Rmerge_I_obs / _reflns_shell.pdbx_Rsym_value
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.type_symbol / _chem_comp.name / _chem_comp.type / _pdbx_struct_assembly_gen.asym_id_list / _pdbx_unobs_or_zero_occ_atoms.label_asym_id / _pdbx_validate_close_contact.auth_asym_id_1 / _pdbx_validate_close_contact.auth_seq_id_1 / _struct_conn.pdbx_dist_value / _struct_conn.pdbx_leaving_atom_flag / _struct_conn.pdbx_role / _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.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 30, 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)58,87513
Polymers56,6602
Non-polymers2,21511
Water5,459303
1


  • Idetical with deposited unit
  • defined by software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area6420 Å2
ΔGint4 kcal/mol
Surface area21370 Å2
MethodPISA
Unit cell
Length a, b, c (Å)130.310, 138.400, 44.940
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: 29017.416 Da / Num. of mol.: 1 / Fragment: UNP RESIDUES 287-547 / Source method: isolated from a natural source / Source: (natural) Momordica charantia (bitter melon) / References: UniProt: B7X8M2, rRNA N-glycosylase

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Sugars , 6 types, 7 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 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
#5: 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.: 2
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
#7: Sugar ChemComp-BMA / beta-D-mannopyranose / beta-D-mannose / D-mannose / mannose


Type: D-saccharide, beta linking / Mass: 180.156 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C6H12O6
IdentifierTypeProgram
DManpbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
b-D-mannopyranoseCOMMON NAMEGMML 1.0
b-D-ManpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
ManSNFG CARBOHYDRATE SYMBOLGMML 1.0
#10: Sugar ChemComp-GAL / beta-D-galactopyranose / beta-D-galactose / D-galactose / galactose


Type: D-saccharide, beta linking / Mass: 180.156 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C6H12O6
IdentifierTypeProgram
DGalpbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
b-D-galactopyranoseCOMMON NAMEGMML 1.0
b-D-GalpIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GalSNFG CARBOHYDRATE SYMBOLGMML 1.0
#11: Sugar ChemComp-A2G / 2-acetamido-2-deoxy-alpha-D-galactopyranose / N-acetyl-alpha-D-galactosamine / 2-acetamido-2-deoxy-alpha-D-galactose / 2-acetamido-2-deoxy-D-galactose / 2-acetamido-2-deoxy-galactose / N-ACETYL-2-DEOXY-2-AMINO-GALACTOSE


Type: D-saccharide, alpha linking / Mass: 221.208 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6
IdentifierTypeProgram
DGalpNAcaCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-a-D-galactopyranosamineCOMMON NAMEGMML 1.0
a-D-GalpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GalNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Non-polymers , 5 types, 307 molecules

#6: Chemical ChemComp-PO4 / PHOSPHATE ION


Mass: 94.971 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: PO4
#8: Chemical ChemComp-EDO / 1,2-ETHANEDIOL / ETHYLENE GLYCOL


Mass: 62.068 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C2H6O2
#9: Chemical ChemComp-PGE / TRIETHYLENE GLYCOL


Mass: 150.173 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C6H14O4
#12: Chemical ChemComp-MBN / TOLUENE


Mass: 92.138 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C7H8
#13: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 303 / 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: 3.38 Å3/Da / Density % sol: 63.6 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 7.3
Details: 0.1 M HEPES, 25% w/v PEG 10000, No-cryo protectant used

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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: Apr 18, 2014
RadiationMonochromator: Si(111) / Protocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.95 Å / Relative weight: 1
ReflectionRedundancy: 8.9 % / Number: 499074 / Rsym value: 0.279 / D res high: 2 Å / D res low: 94.874 Å / Num. obs: 56031 / % possible obs: 100
Diffraction reflection shell
Highest resolution (Å)Lowest resolution (Å)IDRmerge(I) obsRsym valueRedundancy
6.3232.6210.0810.0818
4.476.3210.1110.1118.7
3.654.4710.1250.1258.9
3.163.6510.1650.1659
2.833.1610.2490.2499
2.582.8310.3770.3779
2.392.5810.5410.5419
2.242.3910.7580.7588.9
2.112.2410.9470.9478.9
22.1111.2461.2468.9
ReflectionResolution: 2→94.874 Å / Num. obs: 56031 / % possible obs: 100 % / Redundancy: 8.9 % / Biso Wilson estimate: 31.8 Å2 / Rmerge(I) obs: 0.279 / Net I/σ(I): 6.6
Reflection shellResolution: 2→2.11 Å / Redundancy: 8.9 % / Rmerge(I) obs: 1.246 / Mean I/σ(I) obs: 0.5 / % possible all: 100

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Phasing

PhasingMethod: molecular replacement

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Processing

Software
NameVersionClassification
REFMAC5.8.0107refinement
SCALA3.3.21data scaling
PHASER2.5.2phasing
PDB_EXTRACT3.15data extraction
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 4Z8S

4z8s


Resolution: 2→32.62 Å / SU B: 6.676 / SU ML: 0.165 / Cross valid method: THROUGHOUT / σ(F): 0 / ESU R: 0.166 / ESU R Free: 0.156
Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS U VALUES
RfactorNum. reflection% reflectionSelection details
Rfree0.266 2829 5.1 %RANDOM
Rwork0.231 ---
obs0.233 52897 99.5 %-
Displacement parametersBiso mean: 28.65 Å2
Baniso -1Baniso -2Baniso -3
1-4.98 Å20 Å20 Å2
2---2.9 Å20 Å2
3----2.08 Å2
Refinement stepCycle: LAST / Resolution: 2→32.62 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3945 0 143 303 4391

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