SAXSdb — 1x77

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

conserved hypothetical protein

Pseudomonas aeruginosa

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	FLAVIN MONONUCLEOTIDE × 2 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q9I4D4_PSEAE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 4–183； UniProt 2–181 Author chain B； PDBConstruct 4–183； UniProt 2–181

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	1x77
Deposition date deposition_date	2004-08-13
Structure title title	Crystal structure of a NAD(P)H-dependent FMN reductase complexed with FMN
Keywords keywords	;Structural genomics, Protein Structure Initiative (PSI), FMN reductase, FMN bound, New York SGX Research Center for Structural Genomics, NYSGXRC, UNKNOWN FUNCTION ;; STRUCTURAL GENOMICS, UNKNOWN FUNCTION
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.

1x77__assembly_1__model_1

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

Download this curve (.dat)

1x77__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1x77__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.54 Å
Rg (electron density)	20.61 Å
Total Rg	21.55 Å
Atom count	2722
Residues	348
Excluded volume	48413 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1x77__assembly_1__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 (3)

Entity 1 Entity 1 polymer

Description description	conserved hypothetical protein
Molecular weight formula_weight	21118.8 kDa
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	2882

MSLSDDIKVLGISGSLRSGSYNSAALQEAIGLVPPGMSIELADISGIPLYNEDVYALGFPPAVERFREQIRAADALLFATPEYNYSMAGVLKNAIDWASRPPEQPFSGKPAAILGASAGRFGTARAQYHLRQTLVFLDVHPLNKPEVMISSAQNAFDAQGRLLDDKARELIQQQLQALQLWVREGGSHHHHHH

Source Source

Source organism organism	Pseudomonas aeruginosa
NCBI taxonomy ID ncbi_taxonomy_id	208964
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	FLAVIN MONONUCLEOTIDE
Molecular weight formula_weight	456.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	160

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1x77a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.5 — Flavoproteins
Family Family family	c.23.5.4 — NADPH-dependent FMN reductase

Domain ID domain_id	d1x77b_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.23 — Flavodoxin-like
Superfamily Superfamily superfamily	c.23.5 — Flavoproteins
Family Family family	c.23.5.4 — NADPH-dependent FMN reductase

CATH v4.4 (2 domains)

Domain ID domain_id	1x77A00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	360 — Flavodoxin domain

Domain ID domain_id	1x77B00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	360 — Flavodoxin domain

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Unit-cell length a length_a	61.473 Å
Unit-cell length b length_b	65.704 Å
Unit-cell length c length_c	117.800 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	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.700 Å
Low-resolution limit resolution_low	44.890 Å
R factor r_factor	0.2190
R_work r_work	0.2190
R_free r_free	0.2820

Crystal structure of a NAD(P)H-dependent FMN reductase complexed with FMN

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

conserved hypothetical 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

1x77__assembly_1__model_1

1x77__assembly_1__model_1 | I(q)

1x77__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Crystal structure of a NAD(P)H-dependent FMN reductase complexed with FMN

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

conserved hypothetical 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

1x77__assembly_1__model_1

1x77__assembly_1__model_1 | I(q)

1x77__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)