SAXSdb — 2px7

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

2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase

Thermus thermophilus HB8

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 2	water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	ISPD_THET8
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 24–236； UniProt 1–213 Author chain B； PDBConstruct 24–236； UniProt 1–213

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	2px7
Deposition date deposition_date	2007-05-14
Structure title title	Crystal structure of 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase from Thermus thermophilus HB8
Keywords keywords	;ttha0171, 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase, ISPD_THET8, ispD, Structural genomics, PSI, Protein Structure Initiative, Southeast Collaboratory for Structural Genomics, SECSG, NPPSFA, National Project on Protein Structural and Functional Analyses, RIKEN STRUCTURAL GENOMICS/PROTEOMICS INITIATIVE, RSGI, TRANSFERASE ;; TRANSFERASE
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.

2px7__assembly_1__model_1

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

Download this curve (.dat)

2px7__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2px7__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	24.07 Å
Rg (electron density)	23.23 Å
Total Rg	24.11 Å
Atom count	3006
Residues	405
Excluded volume	54108 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2px7__assembly_1__model_1`	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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2px7a_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.68 — Nucleotide-diphospho-sugar transferases
Superfamily Superfamily superfamily	c.68.1 — Nucleotide-diphospho-sugar transferases
Family Family family	c.68.1.0 — automated matches

Domain ID domain_id	d2px7b_
Class class	c — Alpha and beta proteins (a/b)
Fold Fold fold	c.68 — Nucleotide-diphospho-sugar transferases
Superfamily Superfamily superfamily	c.68.1 — Nucleotide-diphospho-sugar transferases
Family Family family	c.68.1.0 — automated matches

CATH v4.4 (2 domains)

Domain ID domain_id	2px7A00
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	550 — Spore Coat Polysaccharide Biosynthesis Protein SpsA; Chain A
Homologous superfamily homologous superfamily	10 — Spore Coat Polysaccharide Biosynthesis Protein SpsA; Chain A

Domain ID domain_id	2px7B00
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	550 — Spore Coat Polysaccharide Biosynthesis Protein SpsA; Chain A
Homologous superfamily homologous superfamily	10 — Spore Coat Polysaccharide Biosynthesis Protein SpsA; Chain A

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Unit-cell length a length_a	104.084 Å
Unit-cell length b length_b	104.084 Å
Unit-cell length c length_c	107.760 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 61
Space-group number int_tables_number	169
Crystal system crystal_system	—

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	50.000 Å
R factor r_factor	0.2280
R_work r_work	0.2270
R_free r_free	0.2480

Description description	2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase
Molecular weight formula_weight	25226.8 kDa
EC 编号 ec_number	2.7.7.60
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	3166

Crystal structure of 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase from Thermus thermophilus HB8

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

2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase

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

2px7__assembly_1__model_1

2px7__assembly_1__model_1 | I(q)

2px7__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)

Source organism organism	Thermus thermophilus HB8
NCBI taxonomy ID ncbi_taxonomy_id	300852
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	160

Crystal structure of 2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase from Thermus thermophilus HB8

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

2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase

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

2px7__assembly_1__model_1

2px7__assembly_1__model_1 | I(q)

2px7__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 4 domains

SCOP 2.08 (2 domains)

CATH v4.4 (2 domains)

7. Citations (1)