2obg

Crystal Structure of Monobody MBP-74/Maltose Binding Protein Fusion Complex

Method: X-RAY DIFFRACTION Dmax: 80.1 Å Quality: EXCELLENT

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

Maltose Binding periplasmic Protein and Monobody MBP-74 Fusion protein

Escherichia coli, synthetic construct

UniProt P0AEX9

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 homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 31–396 Fragment:MBP (residues 5-370), MBP-74 (residues 1001-1093) No other associated polymer X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 6.5;292 K;20% PEG-1000, 0.1 M Na/K phosphate, 0.2 M NaCl, pH 6.5, VAPOR DIFFUSION, SITTING DROP, temperature 292K Resolution 2.35 Å R-free 0.250

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.

366 other PDB entries and 491 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name MALE_ECOLI
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 3–368; UniProt 31–396

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.

SAXS scattering curve SAXS Profile

SAXS profile for 2obg

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 2obg
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2. Structure Basics 2. Structure Basics

Entry ID entry_id2obg
Deposition date deposition_date2006-12-19
Structure title titleCrystal Structure of Monobody MBP-74/Maltose Binding Protein Fusion Complex
Keywords keywordsDomain swapping, Binding Protein, Antibody Mimic, Binary Interface, DE NOVO PROTEIN, PROTEIN BINDING; DE NOVO PROTEIN, PROTEIN BINDING
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier25.20
Radius of gyration Rg (electron density) rg_electron24.18
Forward intensity I(0) i037942300.00
Molecular weight molecular_weight49214.0 kDa
Excluded volume excluded_volume62114 ų
Envelope volume envelope_volume74081 ų
Hydration-shell volume shell_volume25764 ų
Envelope diameter envelope_diameter83.2
Shell Rg shell_rg31.24
Envelope Rg envelope_rg24.23
Shape Rg shape_rg24.17
Total Rg total_rg25.07
Total atoms total_atoms3487
Residues n_residues457
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

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

Maximum dimension Dmax dmax80.1
Rg (real space) rg_real25.14
Rg uncertainty (real space) rg_real_error0.47
I(0) (real space) i0_real3.7940e+07
I(0) uncertainty (real space) i0_real_error5.6560e+05
Rg (reciprocal space) rg_reciprocal25.16
I(0) (reciprocal space) i0_reciprocal37940000.0000
Solution quality estimate total_estimate0.9071
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary28.0
Skewness Skewness skewness0.244
Kurtosis Kurtosis kurtosis-0.479
Angular range angular_range— – 0.3150 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha6669000.0000
Real-space data points n_real_points64
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.935; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.993; Smooth: 0.990

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (2)

7. Fold Classification (SCOP + CATH) 3 domains

CATH v4.4 (3 domains)

Domain ID domain_id2obgA01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily10 — Periplasmic binding protein-like II
Domain ID domain_id2obgA02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology190 — D-Maltodextrin-Binding Protein; domain 2
Homologous superfamily homologous superfamily10 — Periplasmic binding protein-like II
Domain ID domain_id2obgA03
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins

8. Citations (1)

9. Files and Curves (10)