7q1e

CPAP:TUBULIN:IIH5 ALPHAREP COMPLEX

Method: X-RAY DIFFRACTION

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

Tubulin alpha chain

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	Tubulin beta chain × 1 （A0A6P3TCJ9） iiH5 ALPHAREP × 2 Centromere protein J × 1 （Q9HC77） GUANOSINE-5'-TRIPHOSPHATE × 2 MAGNESIUM ION × 2 GLYCEROL × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A6P7DY20_SHEEP
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–451； UniProt 1–451

Tubulin beta chain

OrganismNot specified

UniProt A0A6P3TCJ9

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	Tubulin alpha chain × 1 （A0A6P7DY20） iiH5 ALPHAREP × 2 Centromere protein J × 1 （Q9HC77） GUANOSINE-5'-TRIPHOSPHATE × 2 MAGNESIUM ION × 2 GLYCEROL × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A6P3TCJ9_SHEEP
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–445； UniProt 1–445

Centromere protein J

Homo sapiens

UniProt Q9HC77

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 5	Tubulin alpha chain × 1 （A0A6P7DY20） Tubulin beta chain × 1 （A0A6P3TCJ9） iiH5 ALPHAREP × 2 GUANOSINE-5'-TRIPHOSPHATE × 2 MAGNESIUM ION × 2 GLYCEROL × 1 water × 3	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CENPJ_HUMAN
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain P； PDBConstruct 2–79； UniProt 320–397

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	7q1e
Deposition date deposition_date	2021-10-19
Structure title title	CPAP:TUBULIN:IIH5 ALPHAREP COMPLEX
Keywords keywords	MICROTUBULE, CENTROMERE PROTEIN J, CENTRIOLE, CELL CYCLE; CELL CYCLE
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.

7q1e__assembly_1__model_1

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

Download this curve (.dat)

7q1e__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

7q1e__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	36.96 Å
Rg (electron density)	36.69 Å
Total Rg	36.97 Å
Atom count	9280
Residues	1230
Excluded volume	163080 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`7q1e__assembly_1__model_1`	pentameric （5）	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 (8)

Entity 1 Entity 1 polymer

Description description	Tubulin alpha chain
Molecular weight formula_weight	50204.4 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	9308

MRECISIHVGQAGVQIGNACWELYCLEHGIQPDGQMPSDKTIGGGDDSFNTFFSETGAGKHVPRAVFVDLEPTVIDEVRTGTYRQLFHPEQLITGKEDAANNYARGHYTIGKEIIDLVLDRIRKLADQCTGLQGFLVFHSFGGGTGSGFTSLLMERLSVDYGKKSKLEFSIYPAPQVSTAVVEPYNSILTTHTTLEHSDCAFMVDNEAIYDICRRNLDIERPTYTNLNRLISQIVSSITASLRFDGALNVDLTEFQTNLVPYPRIHFPLATYAPVISAEKAYHEQLSVAEITNACFEPANQMVKCDPRHGKYMACCLLYRGDVVPKDVNAAIATIKTKRSIQFVDWCPTGFKVGINYQPPTVVPGGDLAKVQRAVCMLSNTTAIAEAWARLDHKFDLMYAKRAFVHWYVGEGMEEGEFSEAREDMAALEKDYEEVGVDSVEGEGEEEGEEY

Entity 2 Entity 2 polymer

Description description	Tubulin beta chain
Molecular weight formula_weight	49999.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B

MREIVHIQAGQCGNQIGAKFWEVISDEHGIDPTGSYHGDSDLQLERINVYYNEATGNKYVPRAILVDLEPGTMDSVRSGPFGQIFRPDNFVFGQSGAGNNWAKGHYTEGAELVDSVLDVVRKESESCDCLQGFQLTHSLGGGTGSGMGTLLISKIREEYPDRIMNTFSVMPSPKVSDTVVEPYNATLSVHQLVENTDETYCIDNEALYDICFRTLKLTTPTYGDLNHLVSATMSGVTTCLRFPGQLNADLRKLAVNMVPFPRLHFFMPGFAPLTSRGSQQYRALTVPELTQQMFDSKNMMAACDPRHGRYLTVAAIFRGRMSMKEVDEQMLNVQNKNSSYFVEWIPNNVKTAVCDIPPRGLKMSATFIGNSTAIQELFKRISEQFTAMFRRKAFLHWYTGEGMDEMEFTEAESNMNDLVSEYQQYQDATADEQGEFEEEEGEDEA

Entity 3 Entity 3 polymer

Description description	iiH5 ALPHAREP
Molecular weight formula_weight	18866.6 kDa
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C,D

MRGSHHHHHHTDPEKVEMYIKNLQDDSPPVRFNAAVALGKIGDERAVEPLIKALKDEDWQVRKTAAYALGKIGDERAVEPLIKALKDEDRYVRSRAALALGKIGDERAVEPLIKALKDEDEYVRLSAASALGKIGGERVRAAMEKLAETGTGFARKVAVNYLETHKSLIS

Source Source

Source organism organism	synthetic construct
NCBI taxonomy ID ncbi_taxonomy_id	32630
Host organism host_organism	Escherichia coli

Entity 4 Entity 4 polymer

Description description	Centromere protein J
Molecular weight formula_weight	9217.6 kDa
Mutation mutation	A320V, L342M
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	P

MVNIEERPIKAAIGERKQTFEDYMEEQIQLEEQELKQKQLKEAEGPLPIKAKPKQPFLKRGEGLARFTNAKSKFQKGKE

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 5 Entity 5 non-polymer

Description description	GUANOSINE-5'-TRIPHOSPHATE
Molecular weight formula_weight	523.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 7 Entity 7 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 8 Entity 8 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	28

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id	7q1eA01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1440 — Tubulin/FtsZ, GTPase domain

Domain ID domain_id	7q1eA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1330 — 60s Ribosomal Protein L30; Chain: A;
Homologous superfamily homologous superfamily	20 — Tubulin/FtsZ, C-terminal domain

Domain ID domain_id	7q1eB01
Class class	3 — Alpha Beta
Architecture architecture	40 — 3-Layer(aba) Sandwich
Topology topology	50 — Rossmann fold
Homologous superfamily homologous superfamily	1440 — Tubulin/FtsZ, GTPase domain

Domain ID domain_id	7q1eB02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1330 — 60s Ribosomal Protein L30; Chain: A;
Homologous superfamily homologous superfamily	20 — Tubulin/FtsZ, C-terminal domain

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Unit-cell length a length_a	53.590 Å
Unit-cell length b length_b	68.050 Å
Unit-cell length c length_c	420.920 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 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	2.700 Å
Low-resolution limit resolution_low	48.840 Å
R factor r_factor	0.2025
R_work r_work	0.1999
R_free r_free	0.2544

CPAP:TUBULIN:IIH5 ALPHAREP COMPLEX

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

Tubulin alpha chain

State in the Current Structure

Other States of the Same Protein in the Database

Tubulin beta chain

State in the Current Structure

Other States of the Same Protein in the Database

Centromere protein J

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

7q1e__assembly_1__model_1

7q1e__assembly_1__model_1 | I(q)

7q1e__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 (8)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)

CPAP:TUBULIN:IIH5 ALPHAREP COMPLEX

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

Tubulin alpha chain

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Tubulin beta chain

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Centromere protein J

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

7q1e__assembly_1__model_1

7q1e__assembly_1__model_1 | I(q)

7q1e__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 (8)

Entity 1 Entity 1 polymer

Polymer Polymer

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

Source Source

Entity 4 Entity 4 polymer

Polymer Polymer

Source Source

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 non-polymer

Entity 7 Entity 7 non-polymer

Entity 8 Entity 8 water

6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

7. Citations (1)