2xsm

Crystal structure of the mammalian cytosolic chaperonin CCT in complex with tubulin

Method: X-RAY DIFFRACTION

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

No usable UniProt protein identity is available for this entry.

The relationship tables retain this entry's assembly and composition data, but cross-PDB links for the same protein cannot be established reliably without a unified protein identity.

Assembly Composition of the Current Entry

Assembly	Physical composition	Protein state	蛋白 / DNA / RNA / 其他Polymer	Data consistency
1	Protein heterocomplex	Heteromer	16 / 0 / 0 / 0	Consistent with protein count

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	2xsm
Deposition date deposition_date	2010-10-29
Structure title title	Crystal structure of the mammalian cytosolic chaperonin CCT in complex with tubulin
Keywords keywords	CHAPERONE, CHAPERONINE GROUP II; CHAPERONE
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.

2xsm__assembly_1__model_1

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

Download this curve (.dat)

2xsm__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2xsm__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	69.12 Å
Rg (electron density)	68.53 Å
Total Rg	68.62 Å
Atom count	1
Residues	1
Excluded volume	1416200 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2xsm__assembly_1__model_1`	hexadecameric （16）	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 (15)

Entity 1 Entity 1 polymer

Description description	CCT
Molecular weight formula_weight	41634.3 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	6438

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Entity 2 Entity 2 polymer

Description description	CCT
Molecular weight formula_weight	40698.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

Entity 3 Entity 3 polymer

Description description	CCT
Molecular weight formula_weight	38740.7 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

Entity 4 Entity 4 polymer

Description description	CCT
Molecular weight formula_weight	40102.4 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	D

Entity 5 Entity 5 polymer

Description description	CCT
Molecular weight formula_weight	40187.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

Entity 6 Entity 6 polymer

Description description	CCT
Molecular weight formula_weight	39676.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F

Entity 7 Entity 7 polymer

Description description	CCT
Molecular weight formula_weight	41293.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	G

Entity 8 Entity 8 polymer

Description description	CCT
Molecular weight formula_weight	40357.7 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	H

Entity 9 Entity 9 polymer

Description description	CCT
Molecular weight formula_weight	24953.6 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	I

Entity 10 Entity 10 polymer

Description description	CCT
Molecular weight formula_weight	25464.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	J

Entity 11 Entity 11 polymer

Description description	CCT
Molecular weight formula_weight	33549.3 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	K

Entity 12 Entity 12 polymer

Description description	CCT
Molecular weight formula_weight	25294.0 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	L,O

Entity 13 Entity 13 polymer

Description description	CCT
Molecular weight formula_weight	25379.1 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	M

Entity 14 Entity 14 polymer

Description description	CCT
Molecular weight formula_weight	24613.2 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	N

Entity 15 Entity 15 polymer

Description description	CCT
Molecular weight formula_weight	40953.5 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	P

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Unit-cell length a length_a	272.700 Å
Unit-cell length b length_b	313.500 Å
Unit-cell length c length_c	158.300 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	8

Space group space_group	P 21 21 2
Space-group number int_tables_number	18
Crystal system crystal_system	—

Resolution resolution	5.500 Å
Low-resolution limit resolution_low	100.000 Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

Crystal structure of the mammalian cytosolic chaperonin CCT in complex with tubulin

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

Assembly Composition of the Current Entry

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2xsm__assembly_1__model_1

2xsm__assembly_1__model_1 | I(q)

2xsm__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 (15)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 polymer

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Entity 6 Entity 6 polymer

Polymer Polymer

Entity 7 Entity 7 polymer

Polymer Polymer

Entity 8 Entity 8 polymer

Polymer Polymer

Entity 9 Entity 9 polymer

Polymer Polymer

Entity 10 Entity 10 polymer

Polymer Polymer

Entity 11 Entity 11 polymer

Polymer Polymer

Entity 12 Entity 12 polymer

Polymer Polymer

Entity 13 Entity 13 polymer

Polymer Polymer

Entity 14 Entity 14 polymer

Polymer Polymer

Entity 15 Entity 15 polymer

Polymer Polymer

7. Citations (1)