SAXSdb — 2xka

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

FTSZ/TUBULIN-RELATED PROTEIN

BACILLUS THURINGIENSIS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE × 1 MAGNESIUM ION × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE × 1 MAGNESIUM ION × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE × 1 MAGNESIUM ION × 1	Consistent with protein count
4	Protein monomer	Monomer	Protein 1	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE × 1 MAGNESIUM ION × 1	Consistent with protein count
5	Protein monomer	Monomer	Protein 1	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE × 1 MAGNESIUM ION × 1	Consistent with protein count
6	Protein monomer	Monomer	Protein 1	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE × 1 MAGNESIUM ION × 1	Consistent with protein count
7	Protein monomer	Monomer	Protein 1	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE × 1 MAGNESIUM ION × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q8KNP3_BACTI
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–421； UniProt 1–421 Author chain B； PDBConstruct 1–421； UniProt 1–421 Author chain C； PDBConstruct 1–421； UniProt 1–421 Author chain D； PDBConstruct 1–421； UniProt 1–421 Author chain E； PDBConstruct 1–421； UniProt 1–421 Author chain F； PDBConstruct 1–421； UniProt 1–421 Author chain G； PDBConstruct 1–421； UniProt 1–421

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	2xka
Deposition date deposition_date	2010-07-07
Structure title title	Crystal structure of a GTPyS-form protofilament of Bacillus thuringiensis serovar israelensis TubZ
Keywords keywords	STRUCTURAL PROTEIN, MOTOR PROTEIN, CYTOSKELETON, CYTOMOTIVE, DNA SEGREGATION, MICROTUBULE, PBTOXIS, PBT156, REPX, TUBR; STRUCTURAL PROTEIN
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.

2xka__assembly_2__model_1

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

Download this curve (.dat)

2xka__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2xka__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	23.27 Å
Rg (electron density)	21.99 Å
Total Rg	22.81 Å
Atom count	3193
Residues	400
Excluded volume	56279 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2xka__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2xka__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`2xka__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`2xka__assembly_4__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`2xka__assembly_5__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
6	1	`2xka__assembly_6__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
7	1	`2xka__assembly_7__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 (3)

Entity 1 Entity 1 polymer

Description description	FTSZ/TUBULIN-RELATED PROTEIN
Molecular weight formula_weight	47330.1 kDa
Mutation mutation	YES
Source method src_method	man
Copy count entity_count	7

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D,E,F,G
Atom count atom_count	22638

MVLNSNELEHIHSTNHSVNDISIRWGVIGAGQKGNKEADLFAGYKFSNGTTCYPTLAVNFAESDMMHLQNIIKEDRIHFDGLKGAARTPSVVTDLFDPETNPNANGYLDKLAQELGRKFTNEEGEVIVDQFLICLGAGGGVGTGWGSLVLQLIREQFFPCPVSMLISLPSGDPDEINNALVLLSEIDEFMREQDRLFGNSDIKPLANVIVNDNTQMQRIIESQKGTKDLKNRYVNWKEVANDNVVSTLHEINIIPENYGSDNVTYDPSDLIKLLSIPGRFLTIGKARIAKFDLHSLENSIKRSLDEGFFSAEHQFETATMYGGFVLRPSNADFFKDVNTENRIRNTLGEYKRLDEIAGKFGDPIWDNEYAVCYTIFAGMTMPKRYISLAREGKELAEKQEQLRAEAQRKQDEEKVDISFAT

Source Source

Source organism organism	BACILLUS THURINGIENSIS
NCBI taxonomy ID ncbi_taxonomy_id	1430
Host organism host_organism	ESCHERICHIA COLI BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	5'-GUANOSINE-DIPHOSPHATE-MONOTHIOPHOSPHATE
Molecular weight formula_weight	539.2 kDa
Source method src_method	syn
Copy count entity_count	7

Entity 3 Entity 3 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	7

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6. Fold Classification (SCOP + CATH) 7 domains

CATH v4.4 (7 domains)

Domain ID domain_id	2xkaA00
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	2xkaB00
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	2xkaC00
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	2xkaD00
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	2xkaE00
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	2xkaF00
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	2xkaG00
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

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Unit-cell length a length_a	51.060 Å
Unit-cell length b length_b	85.150 Å
Unit-cell length c length_c	632.230 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	28

Space group space_group	P 21 21 21
Space-group number int_tables_number	19
Crystal system crystal_system	—

Resolution resolution	3.000 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.2346
R_work r_work	0.2320
R_free r_free	0.2844

Crystal structure of a GTPyS-form protofilament of Bacillus thuringiensis serovar israelensis TubZ

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

FTSZ/TUBULIN-RELATED PROTEIN

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

2xka__assembly_2__model_1

2xka__assembly_2__model_1 | I(q)

2xka__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

6. Fold Classification (SCOP + CATH) 7 domains

CATH v4.4 (7 domains)

7. Citations (1)

Crystal structure of a GTPyS-form protofilament of Bacillus thuringiensis serovar israelensis TubZ

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

FTSZ/TUBULIN-RELATED PROTEIN

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

2xka__assembly_2__model_1

2xka__assembly_2__model_1 | I(q)

2xka__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

6. Fold Classification (SCOP + CATH) 7 domains

CATH v4.4 (7 domains)

7. Citations (1)