SAXSdb — 2npx

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

NADH PEROXIDASE

Enterococcus faecalis

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	FLAVIN-ADENINE DINUCLEOTIDE × 1 NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 1 water × 1	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 2	FLAVIN-ADENINE DINUCLEOTIDE × 2 NICOTINAMIDE-ADENINE-DINUCLEOTIDE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	NAPE_ENTFA
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–447； UniProt 1–447

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	2npx
Deposition date deposition_date	1992-05-29
Structure title title	NADH BINDING SITE AND CATALYSIS OF NADH PEROXIDASE
Keywords keywords	OXIDOREDUCTASE(H2O2(A)); OXIDOREDUCTASE(H2O2(A))
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.

2npx__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2npx__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2npx__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	31.89 Å
Rg (electron density)	31.15 Å
Total Rg	31.68 Å
Atom count	7180
Residues	892
Excluded volume	127880 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2npx__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2npx__assembly_2__model_1`	dimeric （2）	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	NADH PEROXIDASE
Molecular weight formula_weight	49651.2 kDa
EC 编号 ec_number	1.11.1.1
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	3927

MKVIVLGSSHGGYEAVEELLNLHPDAEIQWYEKGDFISFLSCGMQLYLEGKVKDVNSVRYMTGEKMESRGVNVFSNTEITAIQPKEHQVTVKDLVSGEERVENYDKLIISPGAVPFELDIPGKDLDNIYLMRGRQWAIKLKQKTVDPEVNNVVVIGSGYIGIEAAEAFAKAGKKVTVIDILDRPLGVYLDKEFTDVLTEEMEANNITIATGETVERYEGDGRVQKVVTDKNAYDADLVVVAVGVRPNTAWLKGTLELHPNGLIKTDEYMRTSEPDVFAVGDATLIKYNPADTEVNIALATNARKQGRFAVKNLEEPVKPFPGVQGSSGLAVFDYKFASTGINEVMAQKLGKETKAVTVVEDYLMDFNPDKQKAWFKLVYDPETTQILGAQLMSKADLTANINAISLAIQAKMTIEDLAYADFFFQPAFDKPWNIINTAALEAVKQER

Source Source

Source organism organism	Enterococcus faecalis
NCBI taxonomy ID ncbi_taxonomy_id	1351

Entity 2 Entity 2 non-polymer

Description description	FLAVIN-ADENINE DINUCLEOTIDE
Molecular weight formula_weight	785.5 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 3 Entity 3 non-polymer

Description description	NICOTINAMIDE-ADENINE-DINUCLEOTIDE
Molecular weight formula_weight	663.4 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	337

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d2npxa1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.3 — FAD/NAD(P)-binding domain
Superfamily Superfamily superfamily	c.3.1 — FAD/NAD(P)-binding domain
Family Family family	c.3.1.5 — FAD/NAD-linked reductases, N-terminal and central domains

Domain ID domain_id	d2npxa2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.3 — FAD/NAD(P)-binding domain
Superfamily Superfamily superfamily	c.3.1 — FAD/NAD(P)-binding domain
Family Family family	c.3.1.5 — FAD/NAD-linked reductases, N-terminal and central domains

Domain ID domain_id	d2npxa3
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.87 — CO dehydrogenase flavoprotein C-domain-like
Superfamily Superfamily superfamily	d.87.1 — FAD/NAD-linked reductases, dimerisation (C-terminal) domain
Family Family family	d.87.1.1 — FAD/NAD-linked reductases, dimerisation (C-terminal) domain

CATH v4.4 (3 domains)

Domain ID domain_id	2npxA01
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	50 — FAD/NAD(P)-binding domain
Homologous superfamily homologous superfamily	60 — FAD/NAD(P)-binding domain

Domain ID domain_id	2npxA02
Class class	3 — Alpha Beta
Architecture architecture	50 — 3-Layer(bba) Sandwich
Topology topology	50 — FAD/NAD(P)-binding domain
Homologous superfamily homologous superfamily	60 — FAD/NAD(P)-binding domain

Domain ID domain_id	2npxA03
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	390 — Enolase-like; domain 1
Homologous superfamily homologous superfamily	30 — FAD/NAD-linked reductase, C-terminal dimerisation domain

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Unit-cell length a length_a	77.200 Å
Unit-cell length b length_b	134.500 Å
Unit-cell length c length_c	145.900 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	8

Space group space_group	I 2 2 2
Space-group number int_tables_number	23
Crystal system crystal_system	—

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	0.1590
R_work r_work	0.1590
R_free r_free	—

NADH BINDING SITE AND CATALYSIS OF NADH PEROXIDASE

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

NADH PEROXIDASE

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

2npx__assembly_2__model_1

2npx__assembly_2__model_1 | I(q)

2npx__assembly_2__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (3)

NADH BINDING SITE AND CATALYSIS OF NADH PEROXIDASE

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

NADH PEROXIDASE

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

2npx__assembly_2__model_1

2npx__assembly_2__model_1 | I(q)

2npx__assembly_2__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (3)