SAXSdb — 1fjl

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

PAIRED PROTEIN

Drosophila melanogaster

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Homooligomer	Protein 2 DNA 2	;DNA (5'-D(APAPTPAPAPTPCPTPGPAPTPTPAPC)-3') ; × 1 ;DNA (5'-D(TPGPTPAPAPTPCPAPGPAPTPTPAPT)-3') ; × 1 water × 4	Consistent with all polymers
2	Protein–DNA	Homooligomer	Protein 2 DNA 2	;DNA (5'-D(TPGPTPAPAPTPCPTPGPAPTPTPAPC)-3') ; × 2 water × 4	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PRD_DROME
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–81； UniProt 196–276 Author chain B； PDBConstruct 1–81； UniProt 196–276 Author chain C； PDBConstruct 1–81； UniProt 196–276

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	1fjl
Deposition date deposition_date	1995-12-17
Structure title title	HOMEODOMAIN FROM THE DROSOPHILA PAIRED PROTEIN BOUND TO A DNA OLIGONUCLEOTIDE
Keywords keywords	DNA-BINDING PROTEIN, DNA, PAIRED BOX, TRANSCRIPTION REGULATION, TRANSCRIPTION-DNA COMPLEX; TRANSCRIPTION/DNA
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.

1fjl__assembly_2__model_1

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

Download this curve (.dat)

1fjl__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1fjl__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	17.11 Å
Rg (electron density)	16.31 Å
Total Rg	17.18 Å
Atom count	1564
Residues	146
Excluded volume	25686 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1fjl__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1fjl__assembly_2__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 (5)

Entity 1 Entity 1 polymer

Description description	PAIRED PROTEIN
Molecular weight formula_weight	9716.8 kDa
Mutation mutation	C, C4S, S50Q
Source method src_method	man
Copy count entity_count	3

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	2739

EDISDCESEPGIALKRKQRRSRTTFSASQLDELERAFERTQYPDIYTREELAQRTNLTEARIQVWFQNRRARLRKQHTSVS

Source Source

Source organism organism	Drosophila melanogaster
Common name common_name	fruit fly
NCBI taxonomy ID ncbi_taxonomy_id	7227
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 polymer

Description description	;DNA (5'-D(APAPTPAPAPTPCPTPGPAPTPTPAPC)-3') ;
Molecular weight formula_weight	4262.8 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	D

AATAATCTGATTAC

Entity 3 Entity 3 polymer

Description description	;DNA (5'-D(TPGPTPAPAPTPCPAPGPAPTPTPAPT)-3') ;
Molecular weight formula_weight	4293.8 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	E

TGTAATCAGATTAT

Entity 4 Entity 4 polymer

Description description	;DNA (5'-D(TPGPTPAPAPTPCPTPGPAPTPTPAPC)-3') ;
Molecular weight formula_weight	4269.8 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	F

TGTAATCTGATTAC

Entity 5 Entity 5 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	243

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d1fjla_
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.1 — Homeodomain-like
Family Family family	a.4.1.1 — Homeodomain

Domain ID domain_id	d1fjlb_
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.1 — Homeodomain-like
Family Family family	a.4.1.1 — Homeodomain

Domain ID domain_id	d1fjlc_
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.1 — Homeodomain-like
Family Family family	a.4.1.1 — Homeodomain

CATH v4.4 (3 domains)

Domain ID domain_id	1fjlA00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	1fjlB00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	1fjlC00
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

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Unit-cell length a length_a	72.210 Å
Unit-cell length b length_b	146.890 Å
Unit-cell length c length_c	77.230 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	24

Space group space_group	C 2 2 21
Space-group number int_tables_number	20
Crystal system crystal_system	—

Resolution resolution	2.000 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	0.1980
R_work r_work	0.1980
R_free r_free	—

HOMEODOMAIN FROM THE DROSOPHILA PAIRED PROTEIN BOUND TO A DNA OLIGONUCLEOTIDE

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

PAIRED 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

1fjl__assembly_2__model_1

1fjl__assembly_2__model_1 | I(q)

1fjl__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (1)

HOMEODOMAIN FROM THE DROSOPHILA PAIRED PROTEIN BOUND TO A DNA OLIGONUCLEOTIDE

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

PAIRED 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

1fjl__assembly_2__model_1

1fjl__assembly_2__model_1 | I(q)

1fjl__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 (5)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (3 domains)

CATH v4.4 (3 domains)

7. Citations (1)