1lbh

INTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG

Method: X-RAY DIFFRACTION Dmax: 104.1 Å Quality: EXCELLENT

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

INTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG

Escherichia coli

UniProt P03023

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 × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 1–360 Chain B; UniProt 1–360 Chain C; UniProt 1–360 Chain D; UniProt 1–360 Not recorded IPT 1-methylethyl 1-thio-beta-D-galactopyranoside × 4 X-RAY DIFFRACTION mmCIF provides none of the parsed experimental conditions Resolution 3.20 Å

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.

21 other PDB entries and 25 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name LACI_ECOLI
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–360; UniProt 1–360 Author chain B; PDBConstruct 1–360; UniProt 1–360 Author chain C; PDBConstruct 1–360; UniProt 1–360 Author chain D; PDBConstruct 1–360; UniProt 1–360

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 1lbh

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1lbh
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1lbh
Deposition date deposition_date1996-02-17
Structure title titleINTACT LACTOSE OPERON REPRESSOR WITH GRATUITOUS INDUCER IPTG
Keywords keywordsTRANSCRIPTION REGULATION, DNA-BINDING, REPRESSOR; TRANSCRIPTION REGULATION
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier33.57
Radius of gyration Rg (electron density) rg_electron32.81
Forward intensity I(0) i0255954000.00
Molecular weight molecular_weight127540.0 kDa
Excluded volume excluded_volume159560 ų
Envelope volume envelope_volume196840 ų
Hydration-shell volume shell_volume48197 ų
Envelope diameter envelope_diameter106.3
Shell Rg shell_rg41.31
Envelope Rg envelope_rg32.36
Shape Rg shape_rg32.82
Total Rg total_rg33.39
Total atoms total_atoms8932
Residues n_residues1184
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 dmax104.1
Rg (real space) rg_real33.43
Rg uncertainty (real space) rg_real_error0.62
I(0) (real space) i0_real2.5600e+08
I(0) uncertainty (real space) i0_real_error3.7800e+06
Rg (reciprocal space) rg_reciprocal33.52
I(0) (reciprocal space) i0_reciprocal256000000.0000
Solution quality estimate total_estimate0.9082
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary44.3
Skewness Skewness skewness0.135
Kurtosis Kurtosis kurtosis-0.565
Angular range angular_range— – 0.2350 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha52090000.0000
Real-space data points n_real_points48
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.948; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.997; Smooth: 0.960

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (2)

7. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd1lbha_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.93 — Periplasmic binding protein-like I
Superfamily Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
Family Family familyc.93.1.1 — L-arabinose binding protein-like
Domain ID domain_idd1lbhb_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.93 — Periplasmic binding protein-like I
Superfamily Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
Family Family familyc.93.1.1 — L-arabinose binding protein-like
Domain ID domain_idd1lbhc_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.93 — Periplasmic binding protein-like I
Superfamily Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
Family Family familyc.93.1.1 — L-arabinose binding protein-like
Domain ID domain_idd1lbhd_
Class classc — Alpha and beta proteins (a/b)
Fold Fold foldc.93 — Periplasmic binding protein-like I
Superfamily Superfamily superfamilyc.93.1 — Periplasmic binding protein-like I
Family Family familyc.93.1.1 — L-arabinose binding protein-like

CATH v4.4 (8 domains)

Domain ID domain_id1lbhA01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1lbhA02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1lbhB01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1lbhB02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1lbhC01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1lbhC02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1lbhD01
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator
Domain ID domain_id1lbhD02
Class class3 — Alpha Beta
Architecture architecture40 — 3-Layer(aba) Sandwich
Topology topology50 — Rossmann fold
Homologous superfamily homologous superfamily2300 — Response regulator

8. Citations (1)

9. Files and Curves (10)