SAXSdb — 2x4f

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

MYOSIN LIGHT CHAIN KINASE FAMILY MEMBER 4

HOMO SAPIENS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein monomer	Monomer	Protein 1	4-(2-amino-4-methyl-1,3-thiazol-5-yl)-N-(3-dioxaziridin-3-ylphenyl)pyrimidin-2-amine × 1 SULFATE ION × 1 PENTAETHYLENE GLYCOL × 1 1,2-ETHANEDIOL × 2 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	4-(2-amino-4-methyl-1,3-thiazol-5-yl)-N-(3-dioxaziridin-3-ylphenyl)pyrimidin-2-amine × 1 1,2-ETHANEDIOL × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MYLK4_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 25–373； UniProt 40–388 Author chain B； PDBConstruct 25–373； UniProt 40–388

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	2x4f
Deposition date deposition_date	2010-01-29
Structure title title	The Crystal Structure of the human myosin light chain kinase LOC340156.
Keywords keywords	LUNG, KINASE, MYOSIN, BREAST CANCER, 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.

2x4f__assembly_2__model_1

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

Download this curve (.dat)

2x4f__assembly_2__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

2x4f__assembly_2__model_1 | P(r) · Pending

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

Rg（Guinier）	20.43 Å
Rg (electron density)	19.26 Å
Total Rg	20.11 Å
Atom count	2300
Residues	288
Excluded volume	41055 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2x4f__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`2x4f__assembly_2__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 (6)

Entity 1 Entity 1 polymer

Description description	MYOSIN LIGHT CHAIN KINASE FAMILY MEMBER 4
Molecular weight formula_weight	42496.3 kDa
EC 编号 ec_number	2.7.11.1
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	4899

MGHHHHHHSSGVDLGTENLYFQSMKNSGDQDSRSGHNEAKEVWSNADLTERMPVKSKRTSALAVDIPAPPAPFDHRIVTAKQGAVNSFYTVSKTEILGGGRFGQVHKCEETATGLKLAAKIIKTRGMKDKEEVKNEISVMNQLDHANLIQLYDAFESKNDIVLVMEYVDGGELFDRIIDESYNLTELDTILFMKQICEGIRHMHQMYILHLDLKPENILCVNRDAKQIKIIDFGLARRYKPREKLKVNFGTPEFLAPEVVNYDFVSFPTDMWSVGVIAYMLLSGLSPFLGDNDAETLNNILACRWDLEDEEFQDISEEAKEFISKLLIKEKSWRISASEALKHPWLSDHKLHSRLSAQKKKNRGSDAQDFVTK

Source Source

Source organism organism	HOMO SAPIENS
Common name common_name	HUMAN
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	SPODOPTERA FRUGIPERDA

Entity 2 Entity 2 non-polymer

Description description	4-(2-amino-4-methyl-1,3-thiazol-5-yl)-N-(3-dioxaziridin-3-ylphenyl)pyrimidin-2-amine
Molecular weight formula_weight	328.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 3 Entity 3 non-polymer

Description description	SULFATE ION
Molecular weight formula_weight	96.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 4 Entity 4 non-polymer

Description description	PENTAETHYLENE GLYCOL
Molecular weight formula_weight	238.3 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 non-polymer

Description description	1,2-ETHANEDIOL
Molecular weight formula_weight	62.1 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	252

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

Domain ID domain_id	d2x4fa_
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.144.1.0 — automated matches

Domain ID domain_id	d2x4fb_
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.144.1.0 — automated matches

CATH v4.4 (4 domains)

Domain ID domain_id	2x4fA01
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	2x4fA02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	510 — Transferase(Phosphotransferase); domain 1
Homologous superfamily homologous superfamily	10 — Transferase(Phosphotransferase) domain 1

Domain ID domain_id	2x4fB01
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	2x4fB02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	510 — Transferase(Phosphotransferase); domain 1
Homologous superfamily homologous superfamily	10 — Transferase(Phosphotransferase) domain 1

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Unit-cell length a length_a	148.880 Å
Unit-cell length b length_b	70.650 Å
Unit-cell length c length_c	96.570 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	118.96 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

Space group space_group	C 1 2 1
Space-group number int_tables_number	5
Crystal system crystal_system	—

Resolution resolution	2.670 Å
Low-resolution limit resolution_low	84.490 Å
R factor r_factor	0.1927
R_work r_work	0.1901
R_free r_free	0.2410

The Crystal Structure of the human myosin light chain kinase LOC340156.

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

MYOSIN LIGHT CHAIN KINASE FAMILY MEMBER 4

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

2x4f__assembly_2__model_1

2x4f__assembly_2__model_1 | I(q)

2x4f__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)

The Crystal Structure of the human myosin light chain kinase LOC340156.

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

MYOSIN LIGHT CHAIN KINASE FAMILY MEMBER 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

2. Structure Basics 2. Structure Basics

3. Official assembly/model SAXS Official SAXS Profiles

2x4f__assembly_2__model_1

2x4f__assembly_2__model_1 | I(q)

2x4f__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 non-polymer

Entity 3 Entity 3 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (2 domains)

CATH v4.4 (4 domains)

7. Citations (1)