SAXSdb — 1sce

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

SUC1

Schizosaccharomyces pombe

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein homooligomer	Homooligomer	Protein 4	CHLORIDE ION × 3 water × 4	Consistent with protein count
2	Protein homooligomer	Homooligomer	Protein 4	CHLORIDE ION × 3 water × 4	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CKS1_SCHPO
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 2–111； UniProt 1–111 Author chain B； PDBConstruct 2–111； UniProt 1–111 Author chain C； PDBConstruct 2–111； UniProt 1–111 Author chain D； PDBConstruct 2–111； UniProt 1–111

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	1sce
Deposition date deposition_date	1995-05-11
Structure title title	CRYSTAL STRUCTURE OF THE CELL CYCLE REGULATORY PROTEIN SUC1 REVEALS A NOVEL BETA-HINGE CONFORMATIONAL SWITCH
Keywords keywords	CELL CYCLE REGULATORY PROTEIN; CELL CYCLE REGULATORY PROTEIN
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.

1sce__assembly_1__model_1

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

Download this curve (.dat)

1sce__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

1sce__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	32.33 Å
Rg (electron density)	32.57 Å
Total Rg	32.84 Å
Atom count	3417
Residues	408
Excluded volume	60733 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`1sce__assembly_1__model_1`	tetrameric （4）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`1sce__assembly_2__model_1`	tetrameric （4）	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	SUC1
Molecular weight formula_weight	13318.1 kDa
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	3655

MSKSGVPRLLTASERERLEPFIDQIHYSPRYADDEYEYRHVMLPKAMLKAIPTDYFNPETGTLRILQEEEWRGLGITQSLGWEMYEVHVPEPHILLFKREKDYQMKSQQRGG

Source Source

Source organism organism	Schizosaccharomyces pombe
Common name common_name	fission yeast
NCBI taxonomy ID ncbi_taxonomy_id	4896
Host organism host_organism	Escherichia coli

Entity 2 Entity 2 non-polymer

Description description	CHLORIDE ION
Molecular weight formula_weight	35.5 kDa
Source method src_method	syn
Copy count entity_count	3

Entity 3 Entity 3 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	238

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_id	d1scea_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.97 — Cell cycle regulatory proteins
Superfamily Superfamily superfamily	d.97.1 — Cell cycle regulatory proteins
Family Family family	d.97.1.1 — Cell cycle regulatory proteins

Domain ID domain_id	d1sceb_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.97 — Cell cycle regulatory proteins
Superfamily Superfamily superfamily	d.97.1 — Cell cycle regulatory proteins
Family Family family	d.97.1.1 — Cell cycle regulatory proteins

Domain ID domain_id	d1scec_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.97 — Cell cycle regulatory proteins
Superfamily Superfamily superfamily	d.97.1 — Cell cycle regulatory proteins
Family Family family	d.97.1.1 — Cell cycle regulatory proteins

Domain ID domain_id	d1sced_
Class class	d — Alpha and beta proteins (a+b)
Fold Fold fold	d.97 — Cell cycle regulatory proteins
Superfamily Superfamily superfamily	d.97.1 — Cell cycle regulatory proteins
Family Family family	d.97.1.1 — Cell cycle regulatory proteins

CATH v4.4 (4 domains)

Domain ID domain_id	1sceA00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	170 — Cyclin-Dependent Kinase Subunit Type 2
Homologous superfamily homologous superfamily	10 — Cyclin-dependent kinase, regulatory subunit

Domain ID domain_id	1sceB00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	170 — Cyclin-Dependent Kinase Subunit Type 2
Homologous superfamily homologous superfamily	10 — Cyclin-dependent kinase, regulatory subunit

Domain ID domain_id	1sceC00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	170 — Cyclin-Dependent Kinase Subunit Type 2
Homologous superfamily homologous superfamily	10 — Cyclin-dependent kinase, regulatory subunit

Domain ID domain_id	1sceD00
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	170 — Cyclin-Dependent Kinase Subunit Type 2
Homologous superfamily homologous superfamily	10 — Cyclin-dependent kinase, regulatory subunit

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Unit-cell length a length_a	55.700 Å
Unit-cell length b length_b	85.600 Å
Unit-cell length c length_c	97.700 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	16

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

Resolution resolution	2.200 Å
Low-resolution limit resolution_low	6.000 Å
R factor r_factor	0.1930
R_work r_work	0.1930
R_free r_free	0.2840

CRYSTAL STRUCTURE OF THE CELL CYCLE REGULATORY PROTEIN SUC1 REVEALS A NOVEL BETA-HINGE CONFORMATIONAL SWITCH

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

SUC1

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

1sce__assembly_1__model_1

1sce__assembly_1__model_1 | I(q)

1sce__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (2)

CRYSTAL STRUCTURE OF THE CELL CYCLE REGULATORY PROTEIN SUC1 REVEALS A NOVEL BETA-HINGE CONFORMATIONAL SWITCH

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

SUC1

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

1sce__assembly_1__model_1

1sce__assembly_1__model_1 | I(q)

1sce__assembly_1__model_1 | P(r) · Pending

4. Crystallography and Experiment 4. Crystallography & Experiment

Unit cell Unit Cell

Symmetry Symmetry

Refinement Refinement

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) 8 domains

SCOP 2.08 (4 domains)

CATH v4.4 (4 domains)

7. Citations (2)