SAXSdb — 3a5m

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

Gelsolin

HOMO SAPIENS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	Major actin × 1 （P07830） CALCIUM ION × 2 MAGNESIUM ION × 1 ADENOSINE-5'-TRIPHOSPHATE × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	GELS_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain S； PDBConstruct 4–127； UniProt 53–176

Major actin

DICTYOSTELIUM DISCOIDEUM

UniProt P07830

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	Gelsolin × 1 （P06396） CALCIUM ION × 2 MAGNESIUM ION × 1 ADENOSINE-5'-TRIPHOSPHATE × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ACT1_DICDI
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 1–375； UniProt 2–376

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	3a5m
Deposition date deposition_date	2009-08-09
Structure title title	Crystal Structure of a Dictyostelium P109I Mg2+-Actin in Complex with Human Gelsolin Segment 1
Keywords keywords	;ACTIN, ADP, HYDROLYSIS, ACTIN CAPPING, ACTIN-BINDING, CYTOSKELETON, ATP-BINDING, NUCLEOTIDE-BINDING, STRUCTURAL PROTEIN, CONTRACTILE PROTEIN ;; CONTRACTILE PROTEIN
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.

3a5m__assembly_1__model_1

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

Download this curve (.dat)

3a5m__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3a5m__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	25.23 Å
Rg (electron density)	24.37 Å
Total Rg	25.15 Å
Atom count	3847
Residues	487
Excluded volume	68524 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3a5m__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 (6)

Entity 1 Entity 1 polymer

Description description	Gelsolin
Molecular weight formula_weight	14205.0 kDa
Mutation mutation	N35C
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	S
Atom count atom_count	4205

MGSVVEHPEFLKAGKEPGLQIWRVEKFDLVPVPTCLYGDFFTGDAYVILKTVQLRNGNLQYDLHYWLGNECSQDESGAAAIFTVQLDDYLNGRAVQHREVQGFESATFLGYFKSGLKYKKGGVASGF

Source Source

Source organism organism	HOMO SAPIENS
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	ESCHERICHIA COLI

Entity 2 Entity 2 polymer

Description description	Major actin
Molecular weight formula_weight	41474.3 kDa
Mutation mutation	P109I/E205A/R206A/E207A
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

DGEDVQALVIDNGSGMCKAGFAGDDAPRAVFPSIVGRPRHTGVMVGMGQKDSYVGDEAQSKRGILTLKYPIEHGIVTNWDDMEKIWHHTFYNELRVAPEEHPVLLTEAILNPKANREKMTQIMFETFNTPAMYVAIQAVLSLYASGRTTGIVMDSGDGVSHTVPIYEGYALPHAILRLDLAGRDLTDYMMKILTERGYSFTTTAAAAIVRDIKEKLAYVALDFEAEMQTAASSSALEKSYELPDGQVITIGNERFRCPEALFQPSFLGMESAGIHETTYNSIMKCDVDIRKDLYGNVVLSGGTTMFPGIADRMNKELTALAPSTMKIKIIAPPERKYSVWIGGSILASLSTFQQMWISKEEYDESGPSIVHRKCF

Source Source

Source organism organism	DICTYOSTELIUM DISCOIDEUM
Common name common_name	SLIME MOLD
NCBI taxonomy ID ncbi_taxonomy_id	44689
Host organism host_organism	DICTYOSTELIUM

Entity 3 Entity 3 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 non-polymer

Description description	ADENOSINE-5'-TRIPHOSPHATE
Molecular weight formula_weight	507.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	358

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6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d3a5mc1
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.55 — Ribonuclease H-like motif
Superfamily Superfamily superfamily	c.55.1 — Actin-like ATPase domain
Family Family family	c.55.1.0 — automated matches

Domain ID domain_id	d3a5mc2
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.55 — Ribonuclease H-like motif
Superfamily Superfamily superfamily	c.55.1 — Actin-like ATPase domain
Family Family family	c.55.1.1 — Actin/HSP70

Domain ID domain_id	d3a5ms_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.109 — Gelsolin-like
Superfamily Superfamily superfamily	d.109.1 — Actin depolymerizing proteins
Family Family family	d.109.1.1 — Gelsolin-like

CATH v4.4 (4 domains)

Domain ID domain_id	3a5mC01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily	40 — ATPase, nucleotide binding domain

Domain ID domain_id	3a5mC02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	420 — Nucleotidyltransferase; domain 5
Homologous superfamily homologous superfamily	40 — ATPase, nucleotide binding domain

Domain ID domain_id	3a5mC03
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	640 — Actin; Chain A, domain 4
Homologous superfamily homologous superfamily	10 — ATPase, substrate binding domain, subdomain 4

Domain ID domain_id	3a5mS00
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	20 — Severin
Homologous superfamily homologous superfamily	10 — Severin

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Unit-cell length a length_a	56.701 Å
Unit-cell length b length_b	69.173 Å
Unit-cell length c length_c	181.690 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	4

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.400 Å
Low-resolution limit resolution_low	31.550 Å
R factor r_factor	0.1820
R_work r_work	0.1800
R_free r_free	0.2230

Crystal Structure of a Dictyostelium P109I Mg2+-Actin in Complex with Human Gelsolin Segment 1

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

Gelsolin

State in the Current Structure

Other States of the Same Protein in the Database

Major actin

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

3a5m__assembly_1__model_1

3a5m__assembly_1__model_1 | I(q)

3a5m__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Crystal Structure of a Dictyostelium P109I Mg2+-Actin in Complex with Human Gelsolin Segment 1

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

Gelsolin

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Major actin

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

3a5m__assembly_1__model_1

3a5m__assembly_1__model_1 | I(q)

3a5m__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

CATH v4.4 (4 domains)

7. Citations (1)