1cjg

NMR STRUCTURE OF LAC REPRESSOR HP62-DNA COMPLEX

Method: SOLUTION NMR Dmax: 71.5 Å Quality: GOOD

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

PROTEIN (LAC REPRESSOR)

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–DNA Homooligomer Protein × 2 DNA 2 PDB declaration: tetrameric(4) Consistent with all polymer counts Chain A; UniProt 1–62 Chain B; UniProt 1–62 Fragment:HEADPIECE, RESIDUES 1 - 62 ;DNA (5'-D(*GP*AP*AP*TP*TP*GP*TP*GP*AP*GP*CP*GP*CP*TP*CP*AP*CP*AP*AP*TP*TP*C)-3') ; × 2 SOLUTION NMR NMR measurement conditions:pH 6.1;315 K;Ionic strength (raw mmCIF value) SEE ARTICLE;Pressure 1 NMR sample composition:SEE ARTICLE 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.

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 2
Chains and sequence ranges Author chain A; PDBConstruct 1–62; UniProt 1–62 Author chain B; PDBConstruct 1–62; UniProt 1–62

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 1cjg

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id1cjg
Deposition date deposition_date1999-04-14
Structure title titleNMR STRUCTURE OF LAC REPRESSOR HP62-DNA COMPLEX
Keywords keywordsTRANSCRIPTION REGULATION, LAC OPERON, LAC REPRESSOR, HEADPIECE, LAC OPERATOR, TRANSCRIPTION-DNA COMPLEX; TRANSCRIPTION/DNA
Experimental Method methodSOLUTION NMR

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

Radius of gyration Rg (Guinier) rg_guinier21.83
Radius of gyration Rg (electron density) rg_electron21.84
Forward intensity I(0) i02236070000.00
Molecular weight molecular_weight298480.0 kDa
Excluded volume excluded_volume331420 ų
Envelope volume envelope_volume62418 ų
Hydration-shell volume shell_volume23170 ų
Envelope diameter envelope_diameter80.0
Shell Rg shell_rg29.63
Envelope Rg envelope_rg23.20
Shape Rg shape_rg21.78
Total Rg total_rg22.09
Total atoms total_atoms36608
Residues n_residues1848
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 dmax71.5
Rg (real space) rg_real22.01
Rg uncertainty (real space) rg_real_error0.59
I(0) (real space) i0_real2.2360e+09
I(0) uncertainty (real space) i0_real_error2.8520e+07
Rg (reciprocal space) rg_reciprocal21.98
I(0) (reciprocal space) i0_reciprocal2236000000.0000
Solution quality estimate total_estimate0.8501
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary20.3
Skewness Skewness skewness0.486
Kurtosis Kurtosis kurtosis-0.394
Angular range angular_range— – 0.3650 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha2288000.0000
Real-space data points n_real_points68
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.847; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.769; Smooth: 0.741

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (2)

7. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd1cjga_
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.5 — GalR/LacI-like bacterial regulator
Domain ID domain_idd1cjgb_
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.5 — GalR/LacI-like bacterial regulator

CATH v4.4 (2 domains)

Domain ID domain_id1cjgA00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology260 — 434 Repressor (Amino-terminal Domain)
Homologous superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains
Domain ID domain_id1cjgB00
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology260 — 434 Repressor (Amino-terminal Domain)
Homologous superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains

8. Citations (5)

9. Files and Curves (10)