9u6d

Crystal structure of tubulin-RB3-TTL in complex with X8

Method: X-RAY DIFFRACTION

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

Tubulin alpha-1B 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 6	Tubulin beta chain × 2 （P02554） Stathmin-4 × 1 （P63043） Tubulin--tyrosine ligase × 1 （A0A8V0Z8P0） GUANOSINE-5'-TRIPHOSPHATE × 2 MAGNESIUM ION × 5 CALCIUM ION × 6 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1 GUANOSINE-5'-DIPHOSPHATE × 2 ;2-[2-fluoranyl-4-[4-[2-[4-[(1~{R},2~{S})-2-fluoranylcyclopropyl]carbonylpiperazin-1-yl]ethoxy]phenyl]phenyl]-~{N}-(phenylmethyl)ethanamide ; × 2 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TBA1B_PIG
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–451； UniProt 1–451 Author chain C； PDBConstruct 1–451； UniProt 1–451

Tubulin beta chain

OrganismNot specified

UniProt P02554

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	Tubulin alpha-1B chain × 2 （Q2XVP4） Stathmin-4 × 1 （P63043） Tubulin--tyrosine ligase × 1 （A0A8V0Z8P0） GUANOSINE-5'-TRIPHOSPHATE × 2 MAGNESIUM ION × 5 CALCIUM ION × 6 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1 GUANOSINE-5'-DIPHOSPHATE × 2 ;2-[2-fluoranyl-4-[4-[2-[4-[(1~{R},2~{S})-2-fluoranylcyclopropyl]carbonylpiperazin-1-yl]ethoxy]phenyl]phenyl]-~{N}-(phenylmethyl)ethanamide ; × 2 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TBB_PIG
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain B； PDBConstruct 1–431； UniProt 1–431 Author chain D； PDBConstruct 1–431； UniProt 1–431

Stathmin-4

Rattus norvegicus

UniProt P63043

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	Tubulin alpha-1B chain × 2 （Q2XVP4） Tubulin beta chain × 2 （P02554） Tubulin--tyrosine ligase × 1 （A0A8V0Z8P0） GUANOSINE-5'-TRIPHOSPHATE × 2 MAGNESIUM ION × 5 CALCIUM ION × 6 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1 GUANOSINE-5'-DIPHOSPHATE × 2 ;2-[2-fluoranyl-4-[4-[2-[4-[(1~{R},2~{S})-2-fluoranylcyclopropyl]carbonylpiperazin-1-yl]ethoxy]phenyl]phenyl]-~{N}-(phenylmethyl)ethanamide ; × 2 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	STMN4_RAT
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain E； PDBConstruct 1–189； UniProt 1–189

Tubulin--tyrosine ligase

Gallus gallus

UniProt A0A8V0Z8P0

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 6	Tubulin alpha-1B chain × 2 （Q2XVP4） Tubulin beta chain × 2 （P02554） Stathmin-4 × 1 （P63043） GUANOSINE-5'-TRIPHOSPHATE × 2 MAGNESIUM ION × 5 CALCIUM ION × 6 2-(N-MORPHOLINO)-ETHANESULFONIC ACID × 1 GUANOSINE-5'-DIPHOSPHATE × 2 ;2-[2-fluoranyl-4-[4-[2-[4-[(1~{R},2~{S})-2-fluoranylcyclopropyl]carbonylpiperazin-1-yl]ethoxy]phenyl]phenyl]-~{N}-(phenylmethyl)ethanamide ; × 2 water × 6	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	A0A8V0Z8P0_CHICK
Isoform	—
PDB entities	4
Chains and sequence ranges	Author chain F； PDBConstruct 1–378； UniProt 1–411

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	9u6d
Deposition date deposition_date	2025-03-23
Structure title title	Crystal structure of tubulin-RB3-TTL in complex with X8
Keywords keywords	Tubulin, 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.

9u6d__assembly_1__model_1

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

Download this curve (.dat)

9u6d__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

9u6d__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	55.38 Å
Rg (electron density)	56.38 Å
Total Rg	56.17 Å
Atom count	33889
Residues	2163
Excluded volume	305000 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`9u6d__assembly_1__model_1`	hexameric （6）	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 (11)

Entity 1 Entity 1 polymer

Description description	Tubulin alpha-1B chain
Molecular weight formula_weight	50204.4 kDa
EC 编号 ec_number	3.6.5.-
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,C
Atom count atom_count	34334

MRECISIHVGQAGVQIGNACWELYCLEHGIQPDGQMPSDKTIGGGDDSFNTFFSETGAGKHVPRAVFVDLEPTVIDEVRTGTYRQLFHPEQLITGKEDAANNYARGHYTIGKEIIDLVLDRIRKLADQCTGLQGFLVFHSFGGGTGSGFTSLLMERLSVDYGKKSKLEFSIYPAPQVSTAVVEPYNSILTTHTTLEHSDCAFMVDNEAIYDICRRNLDIERPTYTNLNRLISQIVSSITASLRFDGALNVDLTEFQTNLVPYPRIHFPLATYAPVISAEKAYHEQLSVAEITNACFEPANQMVKCDPRHGKYMACCLLYRGDVVPKDVNAAIATIKTKRSIQFVDWCPTGFKVGINYQPPTVVPGGDLAKVQRAVCMLSNTTAIAEAWARLDHKFDLMYAKRAFVHWYVGEGMEEGEFSEAREDMAALEKDYEEVGVDSVEGEGEEEGEEY

Entity 2 Entity 2 polymer

Description description	Tubulin beta chain
Molecular weight formula_weight	48299.3 kDa
Source method src_method	nat
Copy count entity_count	2

Polymer Polymer

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

MREIVHIQAGQCGNQIGAKFWEVISDEHGIDPTGSYHGDSDLQLERINVYYNEAAGNKYVPRAILVDLEPGTMDSVRSGPFGQIFRPDNFVFGQSGAGNNWAKGHYTEGAELVDSVLDVVRKESESCDCLQGFQLTHSLGGGTGSGMGTLLISKIREEYPDRIMNTFSVVPSPKVSDTVVEPYNATLSVHQLVENTDETYCIDNEALYDICFRTLKLTTPTYGDLNHLVSATMSGVTTCLRFPGQLNADLRKLAVNMVPFPRLHFFMPGFAPLTSRGSQQYRALTVPELTQQMFDAKNMMAACDPRHGRYLTVAAVFRGRMSMKEVDEQMLNVQNKNSSYFVEWIPNNVKTAVCDIPPRGLKMSATFIGNSTAIQELFKRISEQFTAMFRRKAFLHWYTGEGMDEMEFTEAESNMNDLVSEYQQYQDATAD

Entity 3 Entity 3 polymer

Description description	Stathmin-4
Molecular weight formula_weight	22125.3 kDa
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

MTLAAYKEKMKELPLVSLFCSCFLSDPLNKSSYKYEADTVDLNWCVISDMEVIELNKCTSGQSFEVILKPPSFDGVPEFNASLPRRRDPSLEEIQKKLEAAEERRKYQEAELLKHLAEKREHEREVIQKAIEENNNFIKMAKEKLAQKMESNKENREAHLAAMLERLQEKDKHAEEVRKNKELKEEASR

Source Source

Source organism organism	Rattus norvegicus
Common name common_name	Norway rat
NCBI taxonomy ID ncbi_taxonomy_id	10116
Host organism host_organism	Escherichia coli

Entity 4 Entity 4 polymer

Description description	Tubulin--tyrosine ligase
Molecular weight formula_weight	44378.5 kDa
EC 编号 ec_number	6.3.2.25
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	F

MYTFVVRDENSSVYAEVSRLLLATGQWKRLRKDNPRFNLMLGERNRLPFGRLGHEPGLVQLVNYYRGADKLCRKASLVKLIKTSPELSESCTWFPESYVIYPTNLKTPVAPAQNGIRHLINNTRTDEREVFLAAYNRRREGREGNVWIAKSSAGAKGEGILISSEASELLDFIDEQGQVHVIQKYLEKPLLLEPGHRKFDIRSWVLVDHLYNIYLYREGVLRTSSEPYNSANFQDKTCHLTNHCIQKEYSKNYGRYEEGNEMFFEEFNQYLMDALNTTLENSILLQIKHIIRSCLMCIEPAISTKHLHYQSFQLFGFDFMVDEELKVWLIEVNGAPACAQKLYAELCQGIVDVAISSVFPLADTGQKTSQPTSIFIKLHHHHHH

Source Source

Source organism organism	Gallus gallus
Common name common_name	chicken
NCBI taxonomy ID ncbi_taxonomy_id	9031
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	5

Entity 7 Entity 7 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	6

Entity 8 Entity 8 non-polymer

Description description	2-(N-MORPHOLINO)-ETHANESULFONIC ACID
Molecular weight formula_weight	195.2 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 9 Entity 9 non-polymer

Description description	GUANOSINE-5'-DIPHOSPHATE
Molecular weight formula_weight	443.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 10 Entity 10 non-polymer

Description description	;2-[2-fluoranyl-4-[4-[2-[4-[(1~{R},2~{S})-2-fluoranylcyclopropyl]carbonylpiperazin-1-yl]ethoxy]phenyl]phenyl]-~{N}-(phenylmethyl)ethanamide ;
Molecular weight formula_weight	533.6 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 11 Entity 11 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	428

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Unit-cell length a length_a	104.850 Å
Unit-cell length b length_b	157.580 Å
Unit-cell length c length_c	181.400 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	orthorhombic

Resolution resolution	2.540 Å
Low-resolution limit resolution_low	62.990 Å
R factor r_factor	0.2105
R_work r_work	0.2090
R_free r_free	0.2376

Crystal structure of tubulin-RB3-TTL in complex with X8

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

Tubulin alpha-1B 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

Stathmin-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

Tubulin--tyrosine ligase

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

9u6d__assembly_1__model_1

9u6d__assembly_1__model_1 | I(q)

9u6d__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 (11)

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 non-polymer

Entity 9 Entity 9 non-polymer

Entity 10 Entity 10 non-polymer

Entity 11 Entity 11 water

7. Citations (1)