SAXSdb — 3gmj

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

Protein mothers against dpp

Drosophila melanogaster

UniProt P42003

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 3	water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MAD_DROME
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 5–245； UniProt 215–455 Author chain B； PDBConstruct 5–245； UniProt 215–455 Author chain C； PDBConstruct 5–245； UniProt 215–455 Author chain D； PDBConstruct 5–245； UniProt 215–455

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	3gmj
Deposition date deposition_date	2009-03-14
Structure title title	Crystal structure of MAD MH2 domain
Keywords keywords	MH2, SMAD, MAD, Cytoplasm, Developmental protein, Nucleus, Phosphoprotein, Transcription, Transcription regulation, Ubl conjugation; TRANSCRIPTION
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.

3gmj__assembly_1__model_1

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

Download this curve (.dat)

3gmj__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3gmj__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.77 Å
Rg (electron density)	24.77 Å
Total Rg	25.56 Å
Atom count	4719
Residues	597
Excluded volume	82772 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3gmj__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`3gmj__assembly_2__model_1`	trimeric （3）	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 (2)

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d3gmja_
Class class	b — All beta proteins
Fold Fold fold	b.26 — SMAD/FHA domain
Superfamily Superfamily superfamily	b.26.1 — SMAD/FHA domain
Family Family family	b.26.1.0 — automated matches

Domain ID domain_id	d3gmjb_
Class class	b — All beta proteins
Fold Fold fold	b.26 — SMAD/FHA domain
Superfamily Superfamily superfamily	b.26.1 — SMAD/FHA domain
Family Family family	b.26.1.0 — automated matches

Domain ID domain_id	d3gmjc_
Class class	b — All beta proteins
Fold Fold fold	b.26 — SMAD/FHA domain
Superfamily Superfamily superfamily	b.26.1 — SMAD/FHA domain
Family Family family	b.26.1.0 — automated matches

Domain ID domain_id	d3gmjd_
Class class	b — All beta proteins
Fold Fold fold	b.26 — SMAD/FHA domain
Superfamily Superfamily superfamily	b.26.1 — SMAD/FHA domain
Family Family family	b.26.1.0 — automated matches

CATH v4.4 (4 domains)

Domain ID domain_id	3gmjA00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	200 — Tumour Suppressor Smad4
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	3gmjB00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	200 — Tumour Suppressor Smad4
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	3gmjC00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	200 — Tumour Suppressor Smad4
Homologous superfamily homologous superfamily	10 —

Domain ID domain_id	3gmjD00
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	200 — Tumour Suppressor Smad4
Homologous superfamily homologous superfamily	10 —

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Unit-cell length a length_a	137.261 Å
Unit-cell length b length_b	137.261 Å
Unit-cell length c length_c	194.430 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	36

Space group space_group	H 3
Space-group number int_tables_number	146
Crystal system crystal_system	—

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	22.328 Å
R factor r_factor	0.1810
R_work r_work	0.1790
R_free r_free	0.2190

Description description	Protein mothers against dpp
Molecular weight formula_weight	27065.1 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	D,B,A,C
Atom count atom_count	6248

Crystal structure of MAD MH2 domain

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

Protein mothers against dpp

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

3gmj__assembly_1__model_1

3gmj__assembly_1__model_1 | I(q)

3gmj__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

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

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	24

Crystal structure of MAD MH2 domain

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

Protein mothers against dpp

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

3gmj__assembly_1__model_1

3gmj__assembly_1__model_1 | I(q)

3gmj__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)