2klf

PERE NMR structure of maltodextrin-binding protein

Method: SOLUTION NMR Dmax: 76.1 Å Quality: GOOD

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

Maltose-binding periplasmic protein

Escherichia coli

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 monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain A; UniProt 27–396 Mutation:I2T No other associated polymer SOLUTION NMR NMR measurement conditions:pH 7.2;310 K;Ionic strength (raw mmCIF value) 0.02;Pressure ambient NMR sample composition:20mM potassium phosphate-1, 2mM beta-cyclodextrin-2, 3mM sodium azide-3, 100mM EDTA-4, 90% H2O/10% D2O | 90% H2O/10% D2O Resolution not provided

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 1–370; UniProt 27–396

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 2klf

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id2klf
Deposition date deposition_date2009-07-02
Structure title titlePERE NMR structure of maltodextrin-binding protein
Keywords keywordsmaltose-binding protein, paramagnetic relaxation, Gd(DTPA-BMA), Sugar transport, Transport, TRANSPORT PROTEIN; TRANSPORT PROTEIN
Experimental Method methodSOLUTION NMR

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

Radius of gyration Rg (Guinier) rg_guinier23.03
Radius of gyration Rg (electron density) rg_electron22.64
Forward intensity I(0) i02133200000.00
Molecular weight molecular_weight406870.0 kDa
Excluded volume excluded_volume514880 ų
Envelope volume envelope_volume88037 ų
Hydration-shell volume shell_volume29972 ų
Envelope diameter envelope_diameter85.9
Shell Rg shell_rg31.90
Envelope Rg envelope_rg24.30
Shape Rg shape_rg22.57
Total Rg total_rg23.06
Total atoms total_atoms57350
Residues n_residues3700
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 dmax76.1
Rg (real space) rg_real23.00
Rg uncertainty (real space) rg_real_error0.43
I(0) (real space) i0_real2.1330e+09
I(0) uncertainty (real space) i0_real_error2.8210e+07
Rg (reciprocal space) rg_reciprocal23.01
I(0) (reciprocal space) i0_reciprocal2133000000.0000
Solution quality estimate total_estimate0.8928
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary25.8
Skewness Skewness skewness0.307
Kurtosis Kurtosis kurtosis-0.387
Angular range angular_range— – 0.3450 −1
Current regularization parameter α current_alpha0.0001
Highest regularization parameter α highest_alpha4133000.0000
Real-space data points n_real_points66
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.869; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.994; Smooth: 0.999

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (1)

7. Fold Classification (SCOP + CATH) 3 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd2klfa_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.94 — Periplasmic binding protein-like II
Superfamily Superfamily superfamilyc.94.1 — Periplasmic binding protein-like II
Family Family familyc.94.1.1 — Phosphate binding protein-like

CATH v4.4 (2 domains)

Domain ID domain_id2klfA01
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_id2klfA02
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

8. Citations (1)

9. Files and Curves (10)