SAXSdb — 6h4u

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

Lysine-specific demethylase 4A

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	ZINC ION × 2 8-[4-(1-methylpiperidin-4-yl)pyrazol-1-yl]-3~{H}-pyrido[3,4-d]pyrimidin-4-one × 1 DIMETHYL SULFOXIDE × 1 GLYCEROL × 1 CHLORIDE ION × 1 water × 1	Consistent with protein count
2	Protein monomer	Monomer	Protein 1	ZINC ION × 2 8-[4-(1-methylpiperidin-4-yl)pyrazol-1-yl]-3~{H}-pyrido[3,4-d]pyrimidin-4-one × 1 DIMETHYL SULFOXIDE × 2 CHLORIDE ION × 1 water × 1	Consistent with protein count
3	Protein monomer	Monomer	Protein 1	ZINC ION × 2 8-[4-(1-methylpiperidin-4-yl)pyrazol-1-yl]-3~{H}-pyrido[3,4-d]pyrimidin-4-one × 1 DIMETHYL SULFOXIDE × 2 CHLORIDE ION × 1 water × 1	Consistent with protein count
4	Protein monomer	Monomer	Protein 1	ZINC ION × 2 8-[4-(1-methylpiperidin-4-yl)pyrazol-1-yl]-3~{H}-pyrido[3,4-d]pyrimidin-4-one × 1 GLYCEROL × 1 CHLORIDE ION × 1 water × 1	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	KDM4A_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–360； UniProt 1–359 Author chain B； PDBConstruct 2–360； UniProt 1–359 Author chain C； PDBConstruct 2–360； UniProt 1–359 Author chain D； PDBConstruct 2–360； UniProt 1–359

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	6h4u
Deposition date deposition_date	2018-07-23
Structure title title	Crystal structure of human KDM4A in complex with compound 34b
Keywords keywords	Histone demethylase, Inhibitor, transcription, OXIDOREDUCTASE; OXIDOREDUCTASE
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.

6h4u__assembly_1__model_1

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

Download this curve (.dat)

6h4u__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

6h4u__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	21.06 Å
Rg (electron density)	20.05 Å
Total Rg	21.09 Å
Atom count	2777
Residues	341
Excluded volume	49406 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`6h4u__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`6h4u__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`6h4u__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`6h4u__assembly_4__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 (7)

Entity 1 Entity 1 polymer

Description description	Lysine-specific demethylase 4A
Molecular weight formula_weight	41854.6 kDa
EC 编号 ec_number	1.14.11.-
Source method src_method	man
Copy count entity_count	4

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	11815

SMASESETLNPSARIMTFYPTMEEFRNFSRYIAYIESQGAHRAGLAKVVPPKEWKPRASYDDIDDLVIPAPIQQLVTGQSGLFTQYNIQKKAMTVREFRKIANSDKYCTPRYSEFEELERKYWKNLTFNPPIYGADVNGTLYEKHVDEWNIGRLRTILDLVEKESGITIEGVNTPYLYFGMWKTSFAWHTEDMDLYSINYLHFGEPKSWYSVPPEHGKRLERLAKGFFPGSAQSCEAFLRHKMTLISPLMLKKYGIPFDKVTQEAGEFMITFPYGYHAGFNHGFNCAESTNFATRRWIEYGKQAVLCSCRKDMVKISMDVFVRKFQPERYKLWKAGKDNTVIDHTLPTPEAAEFLKESEL

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Escherichia coli BL21(DE3)

Entity 2 Entity 2 non-polymer

Description description	ZINC ION
Molecular weight formula_weight	65.4 kDa
Source method src_method	syn
Copy count entity_count	8

Entity 3 Entity 3 non-polymer

Description description	8-[4-(1-methylpiperidin-4-yl)pyrazol-1-yl]-3~{H}-pyrido[3,4-d]pyrimidin-4-one
Molecular weight formula_weight	310.4 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 4 Entity 4 non-polymer

Description description	DIMETHYL SULFOXIDE
Molecular weight formula_weight	78.1 kDa
Source method src_method	syn
Copy count entity_count	5

Entity 5 Entity 5 non-polymer

Description description	GLYCEROL
Molecular weight formula_weight	92.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	4

Entity 7 Entity 7 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	711

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d6h4ua_
Class class	b — All beta proteins
Fold Fold fold	b.82 — Double-stranded beta-helix
Superfamily Superfamily superfamily	b.82.2 — Clavaminate synthase-like
Family Family family	b.82.2.14 — Jumonji domain / Histone demethylase core

Domain ID domain_id	d6h4ub_
Class class	b — All beta proteins
Fold Fold fold	b.82 — Double-stranded beta-helix
Superfamily Superfamily superfamily	b.82.2 — Clavaminate synthase-like
Family Family family	b.82.2.14 — Jumonji domain / Histone demethylase core

Domain ID domain_id	d6h4uc_
Class class	b — All beta proteins
Fold Fold fold	b.82 — Double-stranded beta-helix
Superfamily Superfamily superfamily	b.82.2 — Clavaminate synthase-like
Family Family family	b.82.2.14 — Jumonji domain / Histone demethylase core

Domain ID domain_id	d6h4ud_
Class class	b — All beta proteins
Fold Fold fold	b.82 — Double-stranded beta-helix
Superfamily Superfamily superfamily	b.82.2 — Clavaminate synthase-like
Family Family family	b.82.2.14 — Jumonji domain / Histone demethylase core

CATH v4.4 (4 domains)

Domain ID domain_id	6h4uA01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	650 — Cupin

Domain ID domain_id	6h4uB01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	650 — Cupin

Domain ID domain_id	6h4uC01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	650 — Cupin

Domain ID domain_id	6h4uD01
Class class	2 — Mainly Beta
Architecture architecture	60 — Sandwich
Topology topology	120 — Jelly Rolls
Homologous superfamily homologous superfamily	650 — Cupin

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Unit-cell length a length_a	58.966 Å
Unit-cell length b length_b	104.220 Å
Unit-cell length c length_c	145.035 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	99.57 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	8

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

Resolution resolution	2.210 Å
Low-resolution limit resolution_low	49.300 Å
R factor r_factor	0.1770
R_work r_work	0.1760
R_free r_free	0.2080

Crystal structure of human KDM4A in complex with compound 34b

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

Lysine-specific demethylase 4A

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

6h4u__assembly_1__model_1

6h4u__assembly_1__model_1 | I(q)

6h4u__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 (7)

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 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Crystal structure of human KDM4A in complex with compound 34b

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

Lysine-specific demethylase 4A

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

6h4u__assembly_1__model_1

6h4u__assembly_1__model_1 | I(q)

6h4u__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 (7)

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 non-polymer

Entity 7 Entity 7 water

6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (1)