SAXSdb — 2pso

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

StAR-related lipid transfer protein 13

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	No other associated polymer	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	STA13_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 27–237； UniProt 903–1113 Author chain B； PDBConstruct 27–237； UniProt 903–1113 Author chain C； PDBConstruct 27–237； UniProt 903–1113

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	2pso
Deposition date deposition_date	2007-05-07
Structure title title	Human StarD13 (DLC2) lipid transfer and protein localization domain
Keywords keywords	alpha and beta protein, lipid binding, helix swapping, Structural Genomics, Structural Genomics Consortium, SGC, 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.

2pso__assembly_2__model_1

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

Download this curve (.dat)

2pso__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2pso__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	18.82 Å
Rg (electron density)	18.11 Å
Total Rg	18.99 Å
Atom count	1535
Residues	198
Excluded volume	27231 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2pso__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2pso__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`2pso__assembly_3__model_1`	monomeric （1）	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 (1)

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6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

Domain ID domain_id	d2psoa1
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	d2psob_
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	d2psoc_
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 (4 domains)

Domain ID domain_id	2psoA00
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	2psoB01
Class class	6 — Special
Architecture architecture	10 — Helix non-globular
Topology topology	250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	1870 —

Domain ID domain_id	2psoB02
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	2psoC00
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

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Unit-cell length a length_a	78.240 Å
Unit-cell length b length_b	78.240 Å
Unit-cell length c length_c	212.720 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	12

Space group space_group	P 43
Space-group number int_tables_number	78
Crystal system crystal_system	—

Resolution resolution	2.800 Å
Low-resolution limit resolution_low	19.790 Å
R factor r_factor	0.2115
R_work r_work	0.2097
R_free r_free	0.2445

Description description	StAR-related lipid transfer protein 13
Molecular weight formula_weight	26957.7 kDa
Source method src_method	man
Copy count entity_count	3

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C
Atom count atom_count	4477

Human StarD13 (DLC2) lipid transfer and protein localization domain

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

StAR-related lipid transfer protein 13

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

2pso__assembly_2__model_1

2pso__assembly_2__model_1 | I(q)

2pso__assembly_2__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	Homo sapiens
Common name common_name	human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli

Human StarD13 (DLC2) lipid transfer and protein localization domain

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

StAR-related lipid transfer protein 13

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

2pso__assembly_2__model_1

2pso__assembly_2__model_1 | I(q)

2pso__assembly_2__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 (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 7 domains

SCOP 2.08 (3 domains)

CATH v4.4 (4 domains)

7. Citations (1)