SAXSdb — 4cpg

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

SMALL GLUTAMINE-RICH TETRATRICOPEPTIDE REPEAT-CONTAINING PROTEIN ALPHA

HOMO SAPIENS

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	SGTA_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 15–83； UniProt 1–69 Author chain B； PDBConstruct 15–83； UniProt 1–69

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	4cpg
Deposition date deposition_date	2014-02-06
Structure title title	Solution structure of the SGTA N-terminal domain
Keywords keywords	CHAPERONE, SGTA, TAIL-ANCHORED, GET PATHWAY, MEMBRANE PROTEIN; CHAPERONE
Experimental Method method	SOLUTION NMR

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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.

4cpg__assembly_1__model_19

Assembly 1 · Model 19 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

4cpg__assembly_1__model_19 | I(q)

100 plotted points; both axes use logarithmic scales.

4cpg__assembly_1__model_19 | P(r) · Pending

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

Rg（Guinier）	15.45 Å
Rg (electron density)	13.67 Å
Total Rg	14.93 Å
Atom count	2104
Residues	138
Excluded volume	18750 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4cpg__assembly_1__model_1`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	2	`4cpg__assembly_1__model_2`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	3	`4cpg__assembly_1__model_3`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	4	`4cpg__assembly_1__model_4`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	5	`4cpg__assembly_1__model_5`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	6	`4cpg__assembly_1__model_6`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	7	`4cpg__assembly_1__model_7`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	8	`4cpg__assembly_1__model_8`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	9	`4cpg__assembly_1__model_9`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	10	`4cpg__assembly_1__model_10`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	11	`4cpg__assembly_1__model_11`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	12	`4cpg__assembly_1__model_12`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	13	`4cpg__assembly_1__model_13`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	14	`4cpg__assembly_1__model_14`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	15	`4cpg__assembly_1__model_15`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	16	`4cpg__assembly_1__model_16`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	17	`4cpg__assembly_1__model_17`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	18	`4cpg__assembly_1__model_18`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	19	`4cpg__assembly_1__model_19`	dimeric （2）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	20	`4cpg__assembly_1__model_20`	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 (1)

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	4cpgA00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	420 — Immunoglobulin FC, subunit C

Domain ID domain_id	4cpgB00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	420 — Immunoglobulin FC, subunit C

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 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	1

Space group space_group	P 1
Space-group number int_tables_number	1
Crystal system crystal_system	—

Description description	SMALL GLUTAMINE-RICH TETRATRICOPEPTIDE REPEAT-CONTAINING PROTEIN ALPHA
Molecular weight formula_weight	9243.3 kDa
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	42080

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

Solution structure of the SGTA N-terminal domain

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

SMALL GLUTAMINE-RICH TETRATRICOPEPTIDE REPEAT-CONTAINING PROTEIN ALPHA

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

4cpg__assembly_1__model_19

4cpg__assembly_1__model_19 | I(q)

4cpg__assembly_1__model_19 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

Solution structure of the SGTA N-terminal domain

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

SMALL GLUTAMINE-RICH TETRATRICOPEPTIDE REPEAT-CONTAINING PROTEIN ALPHA

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

4cpg__assembly_1__model_19

4cpg__assembly_1__model_19 | I(q)

4cpg__assembly_1__model_19 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

5. Entities and Polymers Entities & Polymers (1)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)