SAXSdb — 2dsr

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1. Protein Identity and Related Structures Protein Identity & Related Structures

Insulin-like growth factor-binding protein 4

Homo sapiens

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein heterocomplex Heteromer Protein × 3 PDB declaration: trimeric（3） Consistent with protein copy count	Chain B； UniProt 24–103 Chain G； UniProt 172–253	Fragment：C-terminal domain Fragment：N-terminal domain	Insulin-like growth factor IB × 1 （P05019）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, SITTING DROP；pH 8；290 K；1M lithium sulfate monohydrate, 2% PEG 8000, VAPOR DIFFUSION, SITTING DROP, temperature 290K	Resolution 2.10 Å R-free 0.256

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 2DSR	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1WQJ Structural Basis for the Regulation of Insulin-Like Growth Factors (IGFs) by IGF Binding Proteins (IGFBPs) Deposited 2004-09-29	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 24–103（80 aa） Fragment：NBP-4 (residues 3-82)	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；277 K；23% PEG 1500, 25mM Tris, pH 7.8, VAPOR DIFFUSION, SITTING DROP, temperature 277K	Resolution 1.60 Å R-free 0.255
2DSP Structural Basis for the Inhibition of Insulin-like Growth Factors by IGF Binding Proteins Deposited 2006-07-05	Different construct Different mutation/modification Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 22–113（92 aa） Fragment：N-terminal domain	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；290 K；23% PEG 1500, 25mM Tris pH 7, VAPOR DIFFUSION, SITTING DROP, temperature 290K	Resolution 2.50 Å R-free 0.271
2DSQ Structural Basis for the Inhibition of Insulin-like Growth Factors by IGF Binding Proteins Deposited 2006-07-05	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 22–113（92 aa） Fragment：N-terminal domain	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.3；290 K；20% PEG 3350, 0.2M lithium acetate, pH 7.3, VAPOR DIFFUSION, SITTING DROP, temperature 290K	Resolution 2.80 Å R-free 0.357
2DSQ Structural Basis for the Inhibition of Insulin-like Growth Factors by IGF Binding Proteins Deposited 2006-07-05	Different construct Different mutation/modification Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain A 22–113（92 aa） Fragment：N-terminal domain	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.3；290 K；20% PEG 3350, 0.2M lithium acetate, pH 7.3, VAPOR DIFFUSION, SITTING DROP, temperature 290K	Resolution 2.80 Å R-free 0.357

3 other PDB entries and 4 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	IBP4_HUMAN
Isoform	—
PDB entities	1, 2
Chains and sequence ranges	Author chain G； PDBConstruct 1–82； UniProt 172–253 Author chain B； PDBConstruct 1–80； UniProt 24–103

Insulin-like growth factor IB

Homo sapiens

UniProt P05019

State in the Current Structure

Assembly	Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Associated Components	Method and Experimental Conditions	Structure Quality
1	Protein heterocomplex Heteromer Protein × 3 PDB declaration: trimeric（3） Consistent with protein copy count	Chain I； UniProt 49–118	Not recorded	Insulin-like growth factor-binding protein 4 × 1 （P22692） Insulin-like growth factor-binding protein 4 × 1 （P22692）	X-RAY DIFFRACTION X-ray crystallization conditions：VAPOR DIFFUSION, SITTING DROP；pH 8；290 K；1M lithium sulfate monohydrate, 2% PEG 8000, VAPOR DIFFUSION, SITTING DROP, temperature 290K	Resolution 2.10 Å R-free 0.256

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB	Difference from Current Entry 2DSR	Assembly / Oligomeric State	Construct	Mutations and Modifications	Ligands, Ions and Non-polymers	Method and Experimental Conditions	Structure Quality
1BQT THREE-DIMENSIONAL STRUCTURE OF HUMAN INSULIN-LIKE GROWTH FACTOR-I (IGF-I) DETERMINED BY 1H-NMR AND DISTANCE GEOMETRY, 6 STRUCTURES Deposited 1998-08-18	Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 49–118（70 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 3；313 K；Pressure 1 NMR sample composition H2O/D2O=9/1 CONTAINING 10 ACETIC ACID-D4	Resolution not provided
1PMX INSULIN-LIKE GROWTH FACTOR-I BOUND TO A PHAGE-DERIVED PEPTIDE Deposited 2003-06-11	Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain A 49–118（70 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 5.1；313 K；Ionic strength (raw mmCIF value) 25 mM；Pressure 1 NMR sample composition 1.4 MM IGF-I (15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE NMR sample composition 1.4 MM IGF-I (13C,15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE NMR sample composition 1.4 MM IGF-I (13C,15N), 2.0 MM PEPTIDE, 25 MM SODIUM ACETATE \| D2O	Resolution not provided
1WQJ Structural Basis for the Regulation of Insulin-Like Growth Factors (IGFs) by IGF Binding Proteins (IGFBPs) Deposited 2004-09-29	Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain I 49–118（70 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.8；277 K；23% PEG 1500, 25mM Tris, pH 7.8, VAPOR DIFFUSION, SITTING DROP, temperature 277K	Resolution 1.60 Å R-free 0.255
2DSP Structural Basis for the Inhibition of Insulin-like Growth Factors by IGF Binding Proteins Deposited 2006-07-05	Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain I 49–118（70 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7；290 K；23% PEG 1500, 25mM Tris pH 7, VAPOR DIFFUSION, SITTING DROP, temperature 290K	Resolution 2.50 Å R-free 0.271
2DSQ Structural Basis for the Inhibition of Insulin-like Growth Factors by IGF Binding Proteins Deposited 2006-07-05	Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain I 49–118（70 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.3；290 K；20% PEG 3350, 0.2M lithium acetate, pH 7.3, VAPOR DIFFUSION, SITTING DROP, temperature 290K	Resolution 2.80 Å R-free 0.357
2DSQ Structural Basis for the Inhibition of Insulin-like Growth Factors by IGF Binding Proteins Deposited 2006-07-05	Different experimental conditions Different structure-quality metrics	Assembly 2 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 49–118（70 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, SITTING DROP；pH 7.3；290 K；20% PEG 3350, 0.2M lithium acetate, pH 7.3, VAPOR DIFFUSION, SITTING DROP, temperature 290K	Resolution 2.80 Å R-free 0.357
3LRI Solution structure and backbone dynamics of long-[Arg(3)]insulin-like growth factor-I Deposited 1999-04-13	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain A 33–102（70 aa）	Mutation：E3R, 13 RESIDUE N-TERMINAL EXTENSION	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 3；303 K；Pressure 1	Resolution not provided
4XSS Insulin-like growth factor I in complex with site 1 of a hybrid insulin receptor / Type 1 insulin-like growth factor receptor Deposited 2015-01-22	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 49–118（70 aa） Fragment：UNP residues 49-118	Not recorded	SO4 SULFATE ION × 1 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 10.5；298 K；1.75 M ammonium sulfate, 0.1 M CAPS-NaOH (pH 10.5), 0.2 M LiSO4	Resolution 3.00 Å R-free 0.229
4XSS Insulin-like growth factor I in complex with site 1 of a hybrid insulin receptor / Type 1 insulin-like growth factor receptor Deposited 2015-01-22	Different construct Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 2 Other combination Heteromer；Protein × 18 PDB declaration: octadecameric	Chain B 49–118（70 aa） Fragment：UNP residues 49-118	Not recorded	SO4 SULFATE ION × 6 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 24	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 10.5；298 K；1.75 M ammonium sulfate, 0.1 M CAPS-NaOH (pH 10.5), 0.2 M LiSO4	Resolution 3.00 Å R-free 0.229
5U8Q Structure of the ectodomain of the human Type 1 insulin-like growth factor receptor in complex with IGF-I Deposited 2016-12-14	Different oligomeric state Different ligand/ion Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 8 PDB declaration: octameric	Chain B 49–118（70 aa）	Not recorded	SO4 SULFATE ION × 4 MLT D-MALATE × 2 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 6	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；293 K；1.2 M ammonium sulfate, 0.1 M imidazole-malate pH 7.0. IGF-1 was included by soaking directly into the mother crystal. For full details see the primary citation.	Resolution 3.27 Å R-free 0.303
6FF3 Crystal structure of Drosophila neural ectodermal development factor Imp-L1 with Human IGF-I Deposited 2018-01-03	Different oligomeric state Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 2 PDB declaration: dimeric	Chain B 49–118（70 aa）	Not recorded	No recorded non-water small molecule	X-RAY DIFFRACTION X-ray crystallization conditions VAPOR DIFFUSION；pH 7.5；291 K；cp 10 mg/ml, 4-8% w/v PEG 6K, 5-20 mM MgCl2, 5 mM SB12, 0.1 M TRIS pH 7.5	Resolution 2.57 Å R-free 0.285
6PYH Cryo-EM structure of full-length IGF1R-IGF1 complex. Only the extracellular region of the complex is resolved. Deposited 2019-07-29	Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 3 PDB declaration: trimeric	Chain B 49–118（70 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.5 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.30 Å
6RVA STRUCTURE OF [ASP58]-IGF-I ANALOGUE Deposited 2019-05-31	Different construct Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric	Chain X 48–118（71 aa）	Not recorded	No recorded non-water small molecule	SOLUTION NMR NMR measurement conditions pH 3；313.15 K；Ionic strength (raw mmCIF value) 0；Pressure 1 NMR sample composition 0.18 mM [L-Asp58]-IGF-1 analogue, 0.01 % sodium azide, 50 mM [U-2H] acetic acid, 95% H2O/5% D2O \| 95% H2O/5% D2O NMR sample composition 0.05 mM [U-13C; U-15N] [L-Asp58]-IGF-1 analogue, 0.01 % sodium azide, 50 mM [U-2H] acetic acid, 95% H2O/5% D2O \| 95% H2O/5% D2O NMR sample composition 0.05 mM [U-13C; U-15N] [L-Asp58]-IGF-1 analogue, 0.01 % sodium azide, 50 mM [U-2H] acetic acid, 100% D2O \| 100% D2O	Resolution not provided
7S0Q Head region of a complex of IGF-I with the ectodomain of a hybrid insulin receptor / type 1 insulin-like growth factor receptor Deposited 2021-08-30	Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric	Chain D 49–118（70 aa）	Not recorded	BMA beta-D-mannopyranose × 1 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 7	ELECTRON MICROSCOPY cryo-EM buffer pH 8；20mM Tris pH 8.0 160mM NaCl cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.70 Å
7WRQ Structure of Human IGF1/IGFBP3/ALS Ternary Complex Deposited 2022-01-27	Different construct Different oligomeric state Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Other combination Heteromer；Protein × 3 PDB declaration: trimeric	Chain C 33–102（70 aa）	Not recorded	NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 4	ELECTRON MICROSCOPY cryo-EM buffer pH 8 cryo-EM vitrification conditions Cryogen ETHANE；blot for 2 seconds before plunging	Resolution 3.60 Å
7YRR Cryo-EM structure of IGF1R with two IGF1 complex Deposited 2022-08-10	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 36–95（60 aa） Chain D 36–95（60 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen OTHER	Resolution 4.30 Å
8EYR Cryo-EM structure of two IGF1 bound full-length mouse IGF1R mutant (four glycine residues inserted in the alpha-CT; IGF1R-P674G4): symmetric conformation Deposited 2022-10-28	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 1–195（195 aa） Chain D 1–195（195 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 4.00 Å
8X06 Cryo-EM structure of the IR/IGF-I complex, conformation 1 Deposited 2023-11-03	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 4 PDB declaration: tetrameric	Chain C 1–195（195 aa） Chain D 1–195（195 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.24 Å
8X2M Cryo-EM structure of the IR/IGF-I complex, conformation 2 Deposited 2023-11-09	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain C 1–195（195 aa） Chain D 1–195（195 aa） Chain E 1–195（195 aa） Chain F 1–195（195 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.31 Å
8XJS Cryo-EM structure of human insulin receptor bound to 3 IGF-I Deposited 2023-12-22	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 5 PDB declaration: pentameric	Chain C 1–195（195 aa） Chain D 1–195（195 aa） Chain E 1–195（195 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.24 Å
8XK1 Cryo-EM structure of human insulin receptor bound to 4 IGF-I Deposited 2023-12-22	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain C 1–195（195 aa） Chain D 1–195（195 aa） Chain E 1–195（195 aa） Chain F 1–195（195 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.31 Å
8XKM Cryo-EM structure of human insulin receptor bound to 4 IGF-I, conformation 3 Deposited 2023-12-23	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain C 1–195（195 aa） Chain D 1–195（195 aa） Chain E 1–195（195 aa） Chain F 1–195（195 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 5.00 Å
8XKR Cryo-EM structure of human insulin receptor bound to 4 IGF-I, conformation 2 Deposited 2023-12-24	Different construct Different mutation/modification Different oligomeric state Different experimental method Different experimental conditions Different structure-quality metrics	Assembly 1 Protein heterocomplex Heteromer；Protein × 6 PDB declaration: hexameric	Chain C 1–195（195 aa） Chain D 1–195（195 aa） Chain E 1–195（195 aa） Chain F 1–195（195 aa）	Not recorded	No recorded non-water small molecule	ELECTRON MICROSCOPY cryo-EM buffer pH 7.4 cryo-EM vitrification conditions Cryogen ETHANE	Resolution 3.53 Å

21 other PDB entries and 23 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence

UniProt name	IGF1B_HUMAN
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain I； PDBConstruct 1–70； UniProt 49–118

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id	2dsr
Deposition date deposition_date	2006-07-05
Structure title title	Structural Basis for the Inhibition of Insulin-like Growth Factors by IGF Binding Proteins
Keywords keywords	IGF, IGFBP, Insulin, PROTEIN BINDING-HORMONE-GROWTH FACTOR COMPLEX; PROTEIN BINDING/HORMONE/GROWTH FACTOR
Experimental Method method	X-RAY DIFFRACTION

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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier	18.48 Å
Radius of gyration Rg (electron density) rg_electron	17.51 Å
Forward intensity I(0) i0	11246500.00
Molecular weight molecular_weight	23120.0 kDa
Excluded volume excluded_volume	28236 Å³
Envelope volume envelope_volume	35365 Å³
Hydration-shell volume shell_volume	17062 Å³
Envelope diameter envelope_diameter	60.6 Å
Shell Rg shell_rg	23.39 Å
Envelope Rg envelope_rg	17.87 Å
Shape Rg shape_rg	17.53 Å
Total Rg total_rg	18.41 Å
Total atoms total_atoms	1604
Residues n_residues	219
Spherical-harmonic order n_harmonics	20
q range q_range	— – 0.5000 Å⁻¹
Data points n_points	101
Shell type shell_type	directional
Solvent electron density solvent_density	0.3340 e/Å³
Shell contrast contrast_shell	0.0300 e/Å³
CRYSOL version crysol_version	4.1.3

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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax	60.1 Å
Rg (real space) rg_real	18.38 Å
Rg uncertainty (real space) rg_real_error	0.27 Å
I(0) (real space) i0_real	1.1250e+07
I(0) uncertainty (real space) i0_real_error	1.4100e+05
Rg (reciprocal space) rg_reciprocal	18.40 Å
I(0) (reciprocal space) i0_reciprocal	11250000.0000
Solution quality estimate total_estimate	0.8916
Solution quality rating solution_quality	GOOD a GOOD solution
P(r) peaks n_peaks	1
Primary peak position r_peak_primary	23.0 Å
Skewness Skewness skewness	0.156
Kurtosis Kurtosis kurtosis	-0.418
Angular range angular_range	— – 0.4300 Å⁻¹
Current regularization parameter α current_alpha	0.0001
Highest regularization parameter α highest_alpha	1416000.0000
Real-space data points n_real_points	74
GNOM version gnom_version	4.1.3
Quality Criteria quality_criteria	AN1: 0.000; Oscil: 0.864; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.997; Smooth: 0.998

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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Description description	Insulin-like growth factor-binding protein 4
Molecular weight formula_weight	9118.4 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	G
Atom count atom_count	1845

GSCQSELHRALERLAASQSRTHEDLYIIPIPNCDRNGNFHPKQCHPALDGQRGKCWCVDRKTGVKLPGGLEPKGELDCHQLA

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 polymer

Description description	Insulin-like growth factor-binding protein 4
Molecular weight formula_weight	8498.1 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

AIHCPPCSEEKLARCRPPVGCEELVREPGCGCCATCALGLGMPCGVYTPRCGSGLRCYPPRGVEKPLHTLMHGQGVCMEL

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Escherichia coli BL21(DE3)

Entity 3 Entity 3 polymer

Description description	Insulin-like growth factor IB
Molecular weight formula_weight	7663.8 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	I

GPETLCGAELVDALQFVCGDRGFYFNKPTGYGSSSRRAPQTGIVDECCFRSCDLRRLEMYCAPLKPAKSA

来源 Source

来源生物 organism	Homo sapiens
通用名 common_name	human
NCBI Class编号 ncbi_taxonomy_id	9606
宿主生物 host_organism	Escherichia coli BL21(DE3)

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	241

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7. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d2dsrb_
Class class	g — Small proteins
Fold Fold fold	g.3 — Knottins (small inhibitors, toxins, lectins)
Superfamily Superfamily superfamily	g.3.9 — Growth factor receptor domain
Family Family family	g.3.9.1 — Growth factor receptor domain

Domain ID domain_id	d2dsrg1
Class class	g — Small proteins
Fold Fold fold	g.28 — Thyroglobulin type-1 domain
Superfamily Superfamily superfamily	g.28.1 — Thyroglobulin type-1 domain
Family Family family	g.28.1.1 — Thyroglobulin type-1 domain

Domain ID domain_id	d2dsri_
Class class	g — Small proteins
Fold Fold fold	g.1 — Insulin-like
Superfamily Superfamily superfamily	g.1.1 — Insulin-like
Family Family family	g.1.1.1 — Insulin-like

CATH v4.4 (3 domains)

Domain ID domain_id	2dsrB01
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	40 — Omega-AgatoxinV
Homologous superfamily homologous superfamily	20 —

Domain ID domain_id	2dsrG00
Class class	4 — Few Secondary Structures
Architecture architecture	10 — Irregular
Topology topology	800 — Invariant Chain; Chain I
Homologous superfamily homologous superfamily	10 — Thyroglobulin type-1

Domain ID domain_id	2dsrI00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	100 — Insulin-like, subunit E
Homologous superfamily homologous superfamily	10 — Insulin-like

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8. Citations (1)

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Unit-cell length a length_a	74.400 Å
Unit-cell length b length_b	50.250 Å
Unit-cell length c length_c	64.300 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	115.30 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.100 Å
Low-resolution limit resolution_low	20.000 Å
R factor r_factor	0.2017
R_work r_work	0.1991
R_free r_free	0.2564

fit	/app/data/saxs_computation/ds/2dsr/2dsr.fit
pddf	/app/data/pr_computation/ds/2dsr/2dsr.pr.out
profile	/app/data/saxs_computation/ds/2dsr/2dsr.dat

Structural Basis for the Inhibition of Insulin-like Growth Factors by IGF Binding Proteins

1. Protein Identity and Related Structures Protein Identity & Related Structures

Insulin-like growth factor-binding protein 4

State in the Current Structure

Other States of the Same Protein in the Database

Insulin-like growth factor IB

State in the Current Structure

Other States of the Same Protein in the Database

SAXS scattering curve SAXS Profile

P(r) Distance Distribution P(r) Distribution

2. Structure Basics 2. Structure Basics

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

5. Crystallography and Experiment 5. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

6. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

来源 Source

Entity 2 Entity 2 polymer

Polymer Polymer

来源 Source

Entity 3 Entity 3 polymer

Polymer Polymer

来源 Source

Entity 4 Entity 4 water

7. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

8. Citations (1)

9. Files and Curves (10)

Files (7)

Curves (3)