SAXSdb — 4lpa

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

Cyclin-dependent kinases regulatory subunit

Saccharomyces cerevisiae

UniProt P20486

State in the Current Structure

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

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	CKS1_YEAST
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 1–113； UniProt 1–113 Author chain B； PDBConstruct 1–113； UniProt 1–113 Author chain C； PDBConstruct 1–113； UniProt 1–113 Author chain D； PDBConstruct 1–113； UniProt 1–113

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	4lpa
Deposition date deposition_date	2013-07-15
Structure title title	Crystal structure of a Cdc6 phosphopeptide in complex with Cks1
Keywords keywords	TRANSFERASE REGULATOR, Phospho-protein, PROTEIN BINDING; PROTEIN BINDING
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.

4lpa__assembly_4__model_1

Assembly 4 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

4lpa__assembly_4__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

4lpa__assembly_4__model_1 | P(r) · Pending

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

Rg（Guinier）	17.31 Å
Rg (electron density)	16.30 Å
Total Rg	17.52 Å
Atom count	943
Residues	112
Excluded volume	16650 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`4lpa__assembly_1__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
2	1	`4lpa__assembly_2__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
3	1	`4lpa__assembly_3__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
4	1	`4lpa__assembly_4__model_1`	monomeric （1）	Success	4.1.3-1-20251215 (887e7ef)	View Download
5	1	`4lpa__assembly_5__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 (2)

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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (8 domains)

Domain ID domain_id	d4lpaa1
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	d4lpaa2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d4lpab1
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	d4lpab2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d4lpac1
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	d4lpac2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

Domain ID domain_id	d4lpad1
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	d4lpad2
Class class	l — Artifacts
Fold Fold fold	l.1 — Tags
Superfamily Superfamily superfamily	l.1.1 — Tags
Family Family family	l.1.1.1 — Tags

CATH v4.4 (4 domains)

Domain ID domain_id	4lpaA00
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	4lpaB00
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	4lpaC00
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	4lpaD00
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	84.690 Å
Unit-cell length b length_b	84.690 Å
Unit-cell length c length_c	239.930 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	32

Space group space_group	P 41 21 2
Space-group number int_tables_number	92
Crystal system crystal_system	—

Resolution resolution	2.900 Å
Low-resolution limit resolution_low	58.147 Å
R factor r_factor	0.2485
R_work r_work	0.2448
R_free r_free	0.2814

Description description	Cyclin-dependent kinases regulatory subunit
Molecular weight formula_weight	14262.0 kDa
Source method src_method	man
Copy count entity_count	4

Polymer type type	polypeptide(L)
Chain IDs strand_id	A,B,C,D
Atom count atom_count	3852

Crystal structure of a Cdc6 phosphopeptide in complex with Cks1

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

Cyclin-dependent kinases regulatory subunit

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

4lpa__assembly_4__model_1

4lpa__assembly_4__model_1 | I(q)

4lpa__assembly_4__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (8 domains)

CATH v4.4 (4 domains)

7. Citations (1)

Source organism organism	Saccharomyces cerevisiae
Common name common_name	;Baker's yeast ;
NCBI taxonomy ID ncbi_taxonomy_id	559292
Host organism host_organism	Escherichia coli

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	52

Crystal structure of a Cdc6 phosphopeptide in complex with Cks1

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

Cyclin-dependent kinases regulatory subunit

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

4lpa__assembly_4__model_1

4lpa__assembly_4__model_1 | I(q)

4lpa__assembly_4__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 (2)

Entity 1 Entity 1 polymer

Polymer Polymer

Source Source

Entity 2 Entity 2 water

6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (8 domains)

CATH v4.4 (4 domains)

7. Citations (1)