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- PDB-1i1a: CRYSTAL STRUCTURE OF THE NEONATAL FC RECEPTOR COMPLEXED WITH A HE... -

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Basic information

Entry
Database: PDB / ID: 1i1a
TitleCRYSTAL STRUCTURE OF THE NEONATAL FC RECEPTOR COMPLEXED WITH A HETERODIMERIC FC
Components
  • (IG GAMMA-2A CHAIN C ...) x 2
  • BETA-2-MICROGLOBULIN
  • NEONATAL FC RECEPTOR A
KeywordsIMMUNE SYSTEM / MHC class I fold / Ig constant domains
Function / homology
Function and homology information


Endosomal/Vacuolar pathway / DAP12 interactions / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / ER-Phagosome pathway / DAP12 signaling / IgG receptor activity / IgG binding / Neutrophil degranulation / humoral immune response ...Endosomal/Vacuolar pathway / DAP12 interactions / Immunoregulatory interactions between a Lymphoid and a non-Lymphoid cell / Antigen Presentation: Folding, assembly and peptide loading of class I MHC / ER-Phagosome pathway / DAP12 signaling / IgG receptor activity / IgG binding / Neutrophil degranulation / humoral immune response / beta-2-microglobulin binding / response to cadmium ion / immunoglobulin complex, circulating / immunoglobulin receptor binding / complement activation, classical pathway / cellular response to iron ion / antigen binding / cellular response to iron(III) ion / antigen processing and presentation of exogenous protein antigen via MHC class Ib, TAP-dependent / negative regulation of forebrain neuron differentiation / regulation of erythrocyte differentiation / peptide antigen assembly with MHC class I protein complex / regulation of iron ion transport / response to molecule of bacterial origin / MHC class I peptide loading complex / HFE-transferrin receptor complex / T cell mediated cytotoxicity / antigen processing and presentation of endogenous peptide antigen via MHC class I / positive regulation of T cell cytokine production / MHC class I protein complex / multicellular organismal-level iron ion homeostasis / negative regulation of neurogenesis / peptide antigen assembly with MHC class II protein complex / positive regulation of receptor-mediated endocytosis / MHC class II protein complex / cellular response to nicotine / positive regulation of T cell mediated cytotoxicity / positive regulation of cellular senescence / peptide antigen binding / negative regulation of epithelial cell proliferation / antigen processing and presentation of exogenous peptide antigen via MHC class II / positive regulation of immune response / sensory perception of smell / positive regulation of T cell activation / negative regulation of neuron projection development / MHC class II protein complex binding / late endosome membrane / iron ion transport / antibacterial humoral response / T cell differentiation in thymus / protein refolding / protein homotetramerization / intracellular iron ion homeostasis / amyloid fibril formation / learning or memory / blood microparticle / endosome membrane / response to xenobiotic stimulus / immune response / lysosomal membrane / external side of plasma membrane / structural molecule activity / protein homodimerization activity / extracellular space / extracellular exosome / identical protein binding
Similarity search - Function
MHC class I-like antigen recognition-like / Murine Class I Major Histocompatibility Complex, H2-DB; Chain A, domain 1 / Class I Histocompatibility antigen, domains alpha 1 and 2 / Beta-2-Microglobulin / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily / MHC classes I/II-like antigen recognition protein / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type ...MHC class I-like antigen recognition-like / Murine Class I Major Histocompatibility Complex, H2-DB; Chain A, domain 1 / Class I Histocompatibility antigen, domains alpha 1 and 2 / Beta-2-Microglobulin / MHC class I-like antigen recognition-like / MHC class I-like antigen recognition-like superfamily / MHC classes I/II-like antigen recognition protein / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulins / Immunoglobulin-like fold / Immunoglobulin-like / Sandwich / 2-Layer Sandwich / Mainly Beta / Alpha Beta
Similarity search - Domain/homology
CYSTEINE / Beta-2-microglobulin / IgG receptor FcRn large subunit p51 / Ig gamma-2A chain C region
Similarity search - Component
Biological speciesRattus norvegicus (Norway rat)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 2.8 Å
AuthorsMartin, W.L. / West Jr., A.P. / Gan, L. / Bjorkman, P.J.
CitationJournal: Mol.Cell / Year: 2001
Title: Crystal structure at 2.8 A of an FcRn/heterodimeric Fc complex: mechanism of pH-dependent binding.
Authors: Martin, W.L. / West Jr., A.P. / Gan, L. / Bjorkman, P.J.
History
DepositionJan 31, 2001Deposition site: RCSB / Processing site: RCSB
Revision 1.0Feb 14, 2001Provider: repository / Type: Initial release
Revision 1.1Apr 27, 2008Group: Version format compliance
Revision 1.2Jul 13, 2011Group: Non-polymer description / Version format compliance
Revision 1.3Sep 25, 2013Group: Derived calculations
Revision 2.0Jul 29, 2020Group: Advisory / Atomic model ...Advisory / Atomic model / Data collection / Database references / Derived calculations / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / database_PDB_caveat / 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_chiral / struct_asym / struct_conn / struct_ref_seq_dif / 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 / _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_ref_seq_dif.details
Description: Carbohydrate remediation / Provider: repository / Type: Remediation
Revision 2.1Oct 27, 2021Group: Advisory / Database references / Structure summary
Category: chem_comp / database_2 ...chem_comp / database_2 / pdbx_unobs_or_zero_occ_atoms / struct_ref_seq_dif
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_ref_seq_dif.details
Revision 2.2Dec 13, 2023Group: Data collection / Derived calculations / Category: chem_comp_atom / chem_comp_bond / struct_conn
Item: _struct_conn.conn_type_id / _struct_conn.id ..._struct_conn.conn_type_id / _struct_conn.id / _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

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: NEONATAL FC RECEPTOR A
B: BETA-2-MICROGLOBULIN
C: IG GAMMA-2A CHAIN C REGION
D: IG GAMMA-2A CHAIN C REGION
hetero molecules


Theoretical massNumber of molelcules
Total (without water)98,95112
Polymers93,8754
Non-polymers5,0778
Water1086
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area14550 Å2
ΔGint70 kcal/mol
Surface area37830 Å2
MethodPISA
Unit cell
Length a, b, c (Å)68.358, 74.213, 196.604
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121
DetailsThe glycosylated heterodimer is the biological unit. The cysteines attached to cysteines 48 and 226 are the result of long term storage in the growth media. / The biological unit is a glycosylated homodimer. One of the two amino acid chains has been mutated as noted making the biological unit in this structure a heterodimer

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Components

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Protein , 2 types, 2 molecules AB

#1: Protein NEONATAL FC RECEPTOR A / IGG RECEPTOR FCRN LARGE SUBUNIT P51 / FCRN


Mass: 30322.887 Da / Num. of mol.: 1 / Fragment: EXTRACELLULAR DOMAIN
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Plasmid: PBJ-5GS / Production host: Cricetulus griseus (Chinese hamster) / Strain (production host): CHO-K1 / References: UniProt: P13599
#2: Protein BETA-2-MICROGLOBULIN / HDFC


Mass: 11652.282 Da / Num. of mol.: 1 / Fragment: FC FRAGMENT
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Plasmid: PBJ-5GS / Production host: Cricetulus griseus (Chinese hamster) / Strain (production host): CHO-K1 / References: UniProt: P07151

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IG GAMMA-2A CHAIN C ... , 2 types, 2 molecules CD

#3: Protein IG GAMMA-2A CHAIN C REGION / WTFC


Mass: 25248.506 Da / Num. of mol.: 1 / Fragment: WILD-TYPE FC FRAGMENT
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Plasmid: PBJ-5GS / Production host: Cricetulus griseus (Chinese hamster) / Strain (production host): CHO-K1 / References: UniProt: P20760
#4: Protein IG GAMMA-2A CHAIN C REGION / NBFC


Mass: 26650.855 Da / Num. of mol.: 1 / Fragment: NON-FCRN-BINDING FC FRAGMENT / Mutation: T252G, I253G, T254G, H310E, H433E, H435E
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Rattus norvegicus (Norway rat) / Plasmid: PBJ-5GS / Production host: Cricetulus griseus (Chinese hamster) / Strain (production host): CHO-K1 / References: UniProt: P20760

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Sugars , 5 types, 6 molecules

#5: Polysaccharide alpha-L-fucopyranose-(1-6)-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
LFucpa1-6DGlcpNAcb1-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/a6-b1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][a-D-GlcpNAc]{[(6+1)][b-L-Fucp]{}}}LINUCSPDB-CARE
#6: Polysaccharide 2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1- ...2-acetamido-2-deoxy-alpha-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1098.016 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAca1-2DManpa1-3DManpb1-4DGlcpNAcb1-4[LFucpa1-6]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/5,6,5/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5][a2122h-1a_1-5_2*NCC/3=O][a1221m-1a_1-5]/1-1-2-3-4-5/a4-b1_a6-f1_b4-c1_c3-d1_d2-e1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][a-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][a-D-GlcpNAc]{}}}}[(6+1)][b-L-Fucp]{}}}LINUCSPDB-CARE
#7: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[2-acetamido-2-deoxy- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[beta-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1463.349 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-2DManpa1-3[DGlcpNAcb1-2DManpa1-6]DManpb1-4DGlcpNAcb1-4[LFucpb1-6]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/4,8,7/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5][a1221m-1b_1-5]/1-1-2-3-1-3-1-4/a4-b1_a6-h1_b4-c1_c3-d1_c6-f1_d2-e1_f2-g1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][b-D-GlcpNAc]{}}[(6+1)][a-D-Manp]{[(2+1)][b-D-GlcpNAc]{}}}}[(6+1)][b-L-Fucp]{}}}LINUCSPDB-CARE
#8: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[2-acetamido-2-deoxy- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-3)-[2-acetamido-2-deoxy-beta-D-glucopyranose-(1-2)-alpha-D-mannopyranose-(1-6)]beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 1463.349 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-2DManpa1-3[DGlcpNAcb1-2DManpa1-6]DManpb1-4DGlcpNAcb1-4[LFucpa1-6]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/4,8,7/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5][a1122h-1a_1-5][a1221m-1a_1-5]/1-1-2-3-1-3-1-4/a4-b1_a6-h1_b4-c1_c3-d1_c6-f1_d2-e1_f2-g1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{[(3+1)][a-D-Manp]{[(2+1)][b-D-GlcpNAc]{}}[(6+1)][a-D-Manp]{[(2+1)][b-D-GlcpNAc]{}}}}[(6+1)][b-L-Fucp]{}}}LINUCSPDB-CARE
#9: 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

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Non-polymers , 2 types, 8 molecules

#10: Chemical ChemComp-CYS / CYSTEINE


Type: L-peptide linking / Mass: 121.158 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C3H7NO2S
#11: Water ChemComp-HOH / water


Mass: 18.015 Da / Num. of mol.: 6 / 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: 2.65 Å3/Da / Density % sol: 53.66 %
Crystal growTemperature: 298 K / Method: vapor diffusion, hanging drop / pH: 5.4
Details: PEG 8000, Ammonium Acetate, Sodium Acetate, Sodium cacodylate, pH 5.4, VAPOR DIFFUSION, HANGING DROP, temperature 298K
Crystal grow
*PLUS
pH: 4.5
Components of the solutions
*PLUS
IDConc.Common nameCrystal-IDSol-IDChemical formula
115 %PEG40001reservoir
2240 mMammonium acetate1reservoir
3120 mMsodium acetate1reservoir
41 mM1reservoirYtCl2

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: SSRL / Beamline: BL9-2 / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 4 / Detector: CCD / Date: Dec 2, 1999
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 2.8→20 Å / Num. all: 25005 / Num. obs: 25005 / % possible obs: 98.6 % / Observed criterion σ(F): 1 / Observed criterion σ(I): 1 / Redundancy: 1 % / Biso Wilson estimate: 25.5 Å2 / Rmerge(I) obs: 0.08 / Rsym value: 0.099 / Net I/σ(I): 18.9
Reflection shellResolution: 2.8→2.9 Å / Redundancy: 1 % / Rmerge(I) obs: 0.3 / Mean I/σ(I) obs: 3 / Num. unique all: 2234 / Rsym value: 0.284 / % possible all: 89.6
Reflection shell
*PLUS
% possible obs: 89.6 %

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Processing

Software
NameVersionClassification
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNS1refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: pdb entry 3fru, pdb entry 1fc1

3fru

1fc1


Resolution: 2.8→19.95 Å / Rfactor Rfree error: 0.009 / Data cutoff high absF: 1843766.66 / Data cutoff low absF: 0 / Isotropic thermal model: anisotropic / Cross valid method: THROUGHOUT / σ(F): 0
RfactorNum. reflection% reflectionSelection details
Rfree0.292 1195 4.8 %RANDOM
Rwork0.222 ---
obs0.222 25005 98.6 %-
all-25005 --
Solvent computationSolvent model: FLAT MODEL / Bsol: 44.3969 Å2 / ksol: 0.275823 e/Å3
Displacement parametersBiso mean: 78.2 Å2
Baniso -1Baniso -2Baniso -3
1-24.29 Å20 Å20 Å2
2---6.04 Å20 Å2
3----18.26 Å2
Refine analyze
FreeObs
Luzzati coordinate error0.53 Å0.39 Å
Luzzati d res low-5 Å
Luzzati sigma a0.75 Å0.58 Å
Refinement stepCycle: LAST / Resolution: 2.8→19.95 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms6182 0 338 6 6526
Refine LS restraints
Refine-IDTypeDev idealDev ideal target
X-RAY DIFFRACTIONc_bond_d0.009
X-RAY DIFFRACTIONc_angle_deg1.6
X-RAY DIFFRACTIONc_dihedral_angle_d25.6
X-RAY DIFFRACTIONc_improper_angle_d1.15
X-RAY DIFFRACTIONc_mcbond_it11.221.5
X-RAY DIFFRACTIONc_mcangle_it17.522
X-RAY DIFFRACTIONc_scbond_it14.62
X-RAY DIFFRACTIONc_scangle_it20.742.5
Refine LS restraints NCSNCS model details: CONSTRAINED
LS refinement shellResolution: 2.8→2.9 Å / Rfactor Rfree error: 0.044 / Total num. of bins used: 10
RfactorNum. reflection% reflection
Rfree0.447 101 4.5 %
Rwork0.428 2122 -
obs-2234 89.6 %
Xplor file
Refine-IDSerial noParam fileTopol file
X-RAY DIFFRACTION1PROTEIN_REP.PARAMPROTEIN.TOP
X-RAY DIFFRACTION2CARBOHYDRATE.PARAMWATER.TOP
X-RAY DIFFRACTION3WATER_REP.PARAMCARBOHYDRATE.TOP
Software
*PLUS
Name: CNS / Version: 1 / Classification: refinement
Refine LS restraints
*PLUS
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_dihedral_angle_d
X-RAY DIFFRACTIONc_dihedral_angle_deg25.6
X-RAY DIFFRACTIONc_improper_angle_d
X-RAY DIFFRACTIONc_improper_angle_deg1.15

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