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Crystal structure of transcription factor NtcA from Synechococcus elongatus in complex with its target DNA.

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

Global nitrogen regulator

Synechococcus elongatus PCC 7942 = FACHB-805

UniProt P29283

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Homooligomer Protein 2 DNA 4 ;DNA (5'-D(P*AP*TP*TP*TP*TP*TP*AP*TP*GP*TP*AP*TP*C)-3') ; × 2 ;DNA (5'-D(P*AP*GP*CP*TP*GP*AP*TP*AP*CP*AP*TP*AP*AP*AP*AP*AP*T)-3') ; × 2 2-OXOGLUTARIC ACID × 2 water × 2 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer
2xgx 2xhk 2xkp 2xkp 2xkp 9gqu 9gug 9gug 9guh

9 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
2xko 9gui 9guj 9guk 9guk

5 assemblies

View Construct and Data Evidence
UniProt name NTCA_SYNE7
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–222； UniProt 1–222 Author chain B； PDBConstruct 1–222； UniProt 1–222

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_id9gui
Deposition date deposition_date2024-09-19
Last revision last_revision2025-03-12
Structure title titleCrystal structure of transcription factor NtcA from Synechococcus elongatus in complex with its target DNA.
Keywords keywordsDNA binding protein. Transcriptional regulation, NtcA, nitrogen regulation, cyanobacteria, CRP, DNA BINDING PROTEIN; DNA BINDING PROTEIN
Experimental Method methodX-RAY DIFFRACTION
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

9gui__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

9gui__assembly_1__model_1 | I(q)

10-2 10-1 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

9gui__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）27.65 Å
Rg (electron density)25.88 Å
Total Rg26.79 Å
Atom count4555
Residues486
Excluded volume78311 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 9gui__assembly_1__model_1 hexameric （6） Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (5)

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7. Citations (1)