SAXSdb — 1h89

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

CAAT/ENHANCER BINDING PROTEIN BETA

HOMO SAPIENS

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein–DNA	Heteromer	Protein 3 DNA 2	MYB PROTO-ONCOGENE PROTEIN × 1 ;DNA(5'-(GPAPTPGPTPGPGPCPGPCPAP APTPCPCPTPTPAPAPCPGPGPAPCPTPG)-3') ; × 1 ;DNA(5'-(CPCPAPGPTPCPCPGPTPTPAP APGPGPAPTPTPGPCPGPCPCPAPCPAPT)-3') ; × 1 POTASSIUM ION × 2 water × 5	Consistent with all polymers

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CEBB_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–64； UniProt 273–336 Author chain B； PDBConstruct 1–64； UniProt 273–336

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	1h89
Deposition date deposition_date	2001-01-30
Structure title title	CRYSTAL STRUCTURE OF TERNARY PROTEIN-DNA COMPLEX2
Keywords keywords	;TRANSCRIPTION/DNA, PROTEIN-DNA COMPLEX, TRANSCRIPTION REGULATION, BZIP, PROTO-ONCOGENE, MYB, C-MYB, C/EBP, TRANSCRIPTION-DNA complex ;; TRANSCRIPTION/DNA
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.

1h89__assembly_1__model_1

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

Download this curve (.dat)

1h89__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1h89__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	30.84 Å
Rg (electron density)	32.21 Å
Total Rg	32.36 Å
Atom count	3142
Residues	295
Excluded volume	52496 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1h89__assembly_1__model_1`	pentameric （5）	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	CAAT/ENHANCER BINDING PROTEIN BETA
Molecular weight formula_weight	7823.0 kDa
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	3265

EYKIRRERNNIAVRKSRDKAKMRNLETQHKVLELTAENERLQKKVEQLSRELSTLRNLFKQLPE

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

Entity 2 Entity 2 polymer

Description description	MYB PROTO-ONCOGENE PROTEIN
Molecular weight formula_weight	19173.1 kDa
Mutation mutation	YES
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MGHLGKTRWTREEDEKLKKLVEQNGTDDWKVIANYLPNRTDVQCQHRWQKVLNPELIKGPWTKEEDQRVIKLVQKYGPKRWSVIAKHLKGRIGKQCRERWHNHLNPEVKKTSWTEEEDRIIYQAHKRLGNRWAEIAKLLPGRTDNAIKNHWNSTMRRKV

Source Source

Source organism organism	MUS MUSCULUS
Common name common_name	HOUSE MOUSE
NCBI taxonomy ID ncbi_taxonomy_id	10090
Host organism host_organism	ESCHERICHIA COLI

Entity 3 Entity 3 polymer

Description description	;DNA(5'-(GPAPTPGPTPGPGPCPGPCPAP APTPCPCPTPTPAPAPCPGPGPAPCPTPG)-3') ;
Molecular weight formula_weight	8028.2 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	D

GATGTGGCGCAATCCTTAACGGACTG

Entity 4 Entity 4 polymer

Description description	;DNA(5'-(CPCPAPGPTPCPCPGPTPTPAP APGPGPAPTPTPGPCPGPCPCPAPCPAPT)-3') ;
Molecular weight formula_weight	7948.1 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polydeoxyribonucleotide
Chain IDs strand_id	E

CCAGTCCGTTAAGGATTGCGCCACAT

Entity 5 Entity 5 non-polymer

Description description	POTASSIUM ION
Molecular weight formula_weight	39.1 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	123

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6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (5 domains)

Domain ID domain_id	d1h89a_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.3 — Leucine zipper domain
Family Family family	h.1.3.1 — Leucine zipper domain

Domain ID domain_id	d1h89b_
Class class	h — Coiled coil proteins
Fold Fold fold	h.1 — Parallel coiled-coil
Superfamily Superfamily superfamily	h.1.3 — Leucine zipper domain
Family Family family	h.1.3.1 — Leucine zipper domain

Domain ID domain_id	d1h89c1
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.1 — Homeodomain-like
Family Family family	a.4.1.3 — Myb/SANT domain

Domain ID domain_id	d1h89c2
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.1 — Homeodomain-like
Family Family family	a.4.1.3 — Myb/SANT domain

Domain ID domain_id	d1h89c3
Class class	a — All alpha proteins
Fold Fold fold	a.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamily	a.4.1 — Homeodomain-like
Family Family family	a.4.1.3 — Myb/SANT domain

CATH v4.4 (4 domains)

Domain ID domain_id	1h89A00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	170 —

Domain ID domain_id	1h89B00
Class class	1 — Mainly Alpha
Architecture architecture	20 — Up-down Bundle
Topology topology	5 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily	170 —

Domain ID domain_id	1h89C01
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

Domain ID domain_id	1h89C02
Class class	1 — Mainly Alpha
Architecture architecture	10 — Orthogonal Bundle
Topology topology	10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily	60 — Homeodomain-like

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Unit-cell length a length_a	62.684 Å
Unit-cell length b length_b	73.383 Å
Unit-cell length c length_c	161.699 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	8

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

Resolution resolution	2.450 Å
Low-resolution limit resolution_low	19.940 Å
R factor r_factor	0.2290
R_work r_work	0.2290
R_free r_free	0.2670

CRYSTAL STRUCTURE OF TERNARY PROTEIN-DNA COMPLEX2

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

CAAT/ENHANCER BINDING PROTEIN BETA

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

1h89__assembly_1__model_1

1h89__assembly_1__model_1 | I(q)

1h89__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (5 domains)

CATH v4.4 (4 domains)

7. Citations (4)

CRYSTAL STRUCTURE OF TERNARY PROTEIN-DNA COMPLEX2

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

CAAT/ENHANCER BINDING PROTEIN BETA

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

1h89__assembly_1__model_1

1h89__assembly_1__model_1 | I(q)

1h89__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 (6)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 polymer

Polymer Polymer

Source Source

Entity 3 Entity 3 polymer

Polymer Polymer

Entity 4 Entity 4 polymer

Polymer Polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

6. Fold Classification (SCOP + CATH) 9 domains

SCOP 2.08 (5 domains)

CATH v4.4 (4 domains)

7. Citations (4)