SAXSdb — 1a6j

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

NITROGEN REGULATORY IIA PROTEIN

Escherichia coli

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	BETA-MERCAPTOETHANOL × 4 SULFATE ION × 2 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PTSN_ECOLI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–163； UniProt 1–163 Author chain B； PDBConstruct 1–163； UniProt 1–163

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_id	1a6j
Deposition date deposition_date	1998-02-25
Structure title title	NITROGEN REGULATORY BACTERIAL PROTEIN IIA-NITROGEN
Keywords keywords	PHOSPHOTRANSFERASE SYSTEM, NITROGEN REGULATION; PHOSPHOTRANSFERASE SYSTEM
Experimental Method method	X-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.

1a6j__assembly_1__model_1

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

Download this curve (.dat)

1a6j__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1a6j__assembly_1__model_1 | P(r) · Pending

P(r) will be calculated and displayed separately for the same assembly/model.

Rg（Guinier）	26.49 Å
Rg (electron density)	25.36 Å
Total Rg	26.18 Å
Atom count	4792
Residues	614
Excluded volume	85920 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1a6j__assembly_1__model_1`	tetrameric （4）	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 (4)

Entity 1 Entity 1 polymer

Description description	NITROGEN REGULATORY IIA PROTEIN
Molecular weight formula_weight	17981.5 kDa
EC 编号 ec_number	2.7.1.69
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	2461

MTNNDTTLQLSSVLNRECTRSRVHCQSKKRALEIISELAAKQLSLPPQVVFEAILTREKMGSTGIGNGIAIPHGKLEEDTLRAVGVFVQLETPIAFDAIDNQPVDLLFALLVPADQTKTHLHTLSLVAKRLADKTICRRLRAAQSDEELYQIITDTEGTPDEA

Source Source

Source organism organism	Escherichia coli
NCBI taxonomy ID ncbi_taxonomy_id	562
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	BETA-MERCAPTOETHANOL
Molecular weight formula_weight	78.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	65

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1a6ja_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.112 — Phoshotransferase/anion transport protein
Superfamily Superfamily superfamily	d.112.1 — Phoshotransferase/anion transport protein
Family Family family	d.112.1.1 — IIA domain of mannitol-specific and ntr phosphotransferase EII

Domain ID domain_id	d1a6jb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.112 — Phoshotransferase/anion transport protein
Superfamily Superfamily superfamily	d.112.1 — Phoshotransferase/anion transport protein
Family Family family	d.112.1.1 — IIA domain of mannitol-specific and ntr phosphotransferase EII

CATH v4.4 (2 domains)

Domain ID domain_id	1a6jA00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	930 — Mannitol-specific EII; Chain A
Homologous superfamily homologous superfamily	10 — Mannitol-specific EII; Chain A

Domain ID domain_id	1a6jB00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	930 — Mannitol-specific EII; Chain A
Homologous superfamily homologous superfamily	10 — Mannitol-specific EII; Chain A

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Unit-cell length a length_a	107.900 Å
Unit-cell length b length_b	107.900 Å
Unit-cell length c length_c	64.300 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	16

Space group space_group	P 43 21 2
Space-group number int_tables_number	96
Crystal system crystal_system	—

Resolution resolution	2.350 Å
Low-resolution limit resolution_low	40.000 Å
R factor r_factor	0.1970
R_work r_work	0.1970
R_free r_free	0.2510

NITROGEN REGULATORY BACTERIAL PROTEIN IIA-NITROGEN

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

NITROGEN REGULATORY IIA PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1a6j__assembly_1__model_1

1a6j__assembly_1__model_1 | I(q)

1a6j__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

NITROGEN REGULATORY BACTERIAL PROTEIN IIA-NITROGEN

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

NITROGEN REGULATORY IIA PROTEIN

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

1a6j__assembly_1__model_1

1a6j__assembly_1__model_1 | I(q)

1a6j__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

Diffraction experiment Diffraction

5. Entities and Polymers Entities & Polymers (4)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)