SAXSdb — 1nw1

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

Choline kinase (49.2 kD)

Caenorhabditis elegans

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	Q22942_CAEEL
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–429； UniProt 1–429 Author chain B； PDBConstruct 1–429； UniProt 1–429

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	1nw1
Deposition date deposition_date	2003-02-05
Structure title title	Crystal Structure of Choline Kinase
Keywords keywords	choline kinase, phospholipid synthesis, protein kinase fold, 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.

1nw1__assembly_1__model_1

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

Download this curve (.dat)

1nw1__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1nw1__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	29.32 Å
Rg (electron density)	28.17 Å
Total Rg	28.99 Å
Atom count	5811
Residues	722
Excluded volume	103880 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1nw1__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 (3)

Entity 1 Entity 1 polymer

Description description	Choline kinase (49.2 kD)
Molecular weight formula_weight	49301.0 kDa
EC 编号 ec_number	2.7.1.32
Source method src_method	man
Copy count entity_count	2

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B
Atom count atom_count	6153

MSSRKVSRAHYDEDELASAANMSLVAEGHFRGMKELLSTMDLDTDANTIPELKERAHMLCARFLGGAWKTVPLEHLRISRIKGGMSNMLFLCRLSEVYPPIRNEPNKVLLRVYFNPETESHLVAESVIFTLLSERHLGPKLYGIFSGGRLEEYIPSRPLSCHEISLAHMSTKIAKRVAKVHQLEVPIWKEPDYLCEALQRWLKQLTGTVDAEHRFDLPEECGVSSVNCLDLARELEFLRAHISLSKSPVTFCHNDLQEGNILLPKASSGNIRMPSLSDETQALGNSLSAFNPADPRLVLIDFEYASYNYRAFDFANHFIEWTIDYDIDEAPFYKIQTENFPENDQMLEFFLNYLREQGNTRENELYKKSEDLVQETLPFVPVSHFFWGVWGLLQVELSPVGFGFADYGRDRLSLYFKHKQLLKNLASHQ

Source Source

Source organism organism	Caenorhabditis elegans
NCBI taxonomy ID ncbi_taxonomy_id	6239
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	CALCIUM ION
Molecular weight formula_weight	40.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	342

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d1nw1a_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.144 — Protein kinase-like (PK-like)
Superfamily Superfamily superfamily	d.144.1 — Protein kinase-like (PK-like)
Family Family family	d.144.1.8 — Choline kinase

Domain ID domain_id	d1nw1b_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.144 — Protein kinase-like (PK-like)
Superfamily Superfamily superfamily	d.144.1 — Protein kinase-like (PK-like)
Family Family family	d.144.1.8 — Choline kinase

CATH v4.4 (4 domains)

Domain ID domain_id	1nw1A01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	200 — Phosphorylase Kinase; domain 1
Homologous superfamily homologous superfamily	20 — Phosphorylase Kinase; domain 1

Domain ID domain_id	1nw1A02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1200 — Aminoglycoside 3'-phosphotransferase; Chain: A, domain 2
Homologous superfamily homologous superfamily	10 — Aminoglycoside phosphotransferase (APH), C-terminal lobe

Domain ID domain_id	1nw1B01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	200 — Phosphorylase Kinase; domain 1
Homologous superfamily homologous superfamily	20 — Phosphorylase Kinase; domain 1

Domain ID domain_id	1nw1B02
Class class	3 — Alpha Beta
Architecture architecture	90 — Alpha-Beta Complex
Topology topology	1200 — Aminoglycoside 3'-phosphotransferase; Chain: A, domain 2
Homologous superfamily homologous superfamily	10 — Aminoglycoside phosphotransferase (APH), C-terminal lobe

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Unit-cell length a length_a	55.372 Å
Unit-cell length b length_b	102.141 Å
Unit-cell length c length_c	85.369 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.66 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	4

Space group space_group	P 1 21 1
Space-group number int_tables_number	4
Crystal system crystal_system	—

Resolution resolution	2.020 Å
Low-resolution limit resolution_low	37.540 Å
R factor r_factor	0.2090
R_work r_work	0.2090
R_free r_free	0.2310

Crystal Structure of Choline Kinase

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

Choline kinase (49.2 kD)

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

1nw1__assembly_1__model_1

1nw1__assembly_1__model_1 | I(q)

1nw1__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Crystal Structure of Choline Kinase

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

Choline kinase (49.2 kD)

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

1nw1__assembly_1__model_1

1nw1__assembly_1__model_1 | I(q)

1nw1__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 (3)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)