SAXSdb — 1jss

▼

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

cholesterol-regulated START protein 4

Mus musculus

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	STAR4_MOUSE
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–224； UniProt 1–224 Author chain B； PDBConstruct 1–224； UniProt 1–224

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.

▼

2. Structure Basics 2. Structure Basics

Entry ID entry_id	1jss
Deposition date deposition_date	2001-08-17
Structure title title	Crystal structure of the Mus musculus cholesterol-regulated START protein 4 (StarD4).
Keywords keywords	;START domain, Structural Genomics, PSI, Protein Structure Initiative, New York SGX Research Center for Structural Genomics, NYSGXRC, LIPID BINDING PROTEIN ;; LIPID BINDING PROTEIN
Experimental Method method	X-RAY DIFFRACTION

▼

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.

1jss__assembly_1__model_1

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

Download this curve (.dat)

1jss__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1jss__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	17.37 Å
Rg (electron density)	16.16 Å
Total Rg	17.28 Å
Atom count	1604
Residues	199
Excluded volume	28396 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1jss__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1jss__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download

▶

4. Crystallography and Experiment 4. Crystallography & Experiment

▶

5. Entities and Polymers Entities & Polymers (2)

▼

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1jssa_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.129 — TBP-like
Superfamily Superfamily superfamily	d.129.3 — Bet v1-like
Family Family family	d.129.3.2 — STAR domain

Domain ID domain_id	d1jssb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.129 — TBP-like
Superfamily Superfamily superfamily	d.129.3 — Bet v1-like
Family Family family	d.129.3.2 — STAR domain

CATH v4.4 (2 domains)

Domain ID domain_id	1jssA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	530 — Alpha-D-Glucose-1,6-Bisphosphate; Chain A, domain 4
Homologous superfamily homologous superfamily	20 — START domain

Domain ID domain_id	1jssB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	530 — Alpha-D-Glucose-1,6-Bisphosphate; Chain A, domain 4
Homologous superfamily homologous superfamily	20 — START domain

▶

Unit-cell length a length_a	69.966 Å
Unit-cell length b length_b	69.966 Å
Unit-cell length c length_c	85.190 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	6

Space group space_group	P 31
Space-group number int_tables_number	144
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	28.550 Å
R factor r_factor	0.2380
R_work r_work	0.2380
R_free r_free	0.2850

Description description	cholesterol-regulated START protein 4
Molecular weight formula_weight	25579.9 kDa
Mutation mutation	K41E, V51A
Source method src_method	man
Copy count entity_count	2

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	3498

Crystal structure of the Mus musculus cholesterol-regulated START protein 4 (StarD4).

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

cholesterol-regulated START protein 4

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

1jss__assembly_1__model_1

1jss__assembly_1__model_1 | I(q)

1jss__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Mus musculus
Common name common_name	house mouse
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	Escherichia coli BL21

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	290

Crystal structure of the Mus musculus cholesterol-regulated START protein 4 (StarD4).

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

cholesterol-regulated START protein 4

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

1jss__assembly_1__model_1

1jss__assembly_1__model_1 | I(q)

1jss__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) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)