SAXSdb — 3q1i

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

Serine/threonine-protein kinase PLK1

Homo sapiens

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	peptide from Transcription elongation regulator 1 × 1 （O14776） PENTAETHYLENE GLYCOL × 1 DI(HYDROXYETHYL)ETHER × 1 2-(2-METHOXYETHOXY)ETHANOL × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	PLK1_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain A； PDBConstruct 9–232； UniProt 371–594

peptide from Transcription elongation regulator 1

OrganismNot specified

UniProt O14776

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	Serine/threonine-protein kinase PLK1 × 1 （P53350） PENTAETHYLENE GLYCOL × 1 DI(HYDROXYETHYL)ETHER × 1 2-(2-METHOXYETHOXY)ETHANOL × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	TCRG1_HUMAN
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain E； PDBConstruct 2–10； UniProt 99–107

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	3q1i
Deposition date deposition_date	2010-12-17
Structure title title	Polo-like kinase I Polo-box domain in complex with FMPPPMSpSM phosphopeptide from TCERG1
Keywords keywords	KINASE, PEPTIDE BINDING PROTEIN, Plk1, 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.

3q1i__assembly_1__model_1

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

Download this curve (.dat)

3q1i__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

3q1i__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	19.17 Å
Rg (electron density)	18.07 Å
Total Rg	18.98 Å
Atom count	1810
Residues	222
Excluded volume	32281 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`3q1i__assembly_1__model_1`	dimeric （2）	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	Serine/threonine-protein kinase PLK1
Molecular weight formula_weight	26755.5 kDa
EC 编号 ec_number	2.7.11.21
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	A
Atom count atom_count	2034

GPLGSPEFDCHLSDMLQQLHSVNASKPSERGLVRQEEAEDPACIPIFWVSKWVDYSDKYGLGYQLCDNSVGVLFNDSTRLILYNDGDSLQYIERDGTESYLTVSSHPNSLMKKITLLKYFRNYMSEHLLKAGANITPREGDELARLPYLRTWFRTRSAIILHLSNGSVQINFFQDHTKLILCPLMAAVTYIDEKRDFRTYRLSLLEEYGCCKELASRLRYARTMVDKLLSSR

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	peptide from Transcription elongation regulator 1
Molecular weight formula_weight	1128.3 kDa
Source method src_method	syn
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	E

XFMPPPMSSMX

Entity 3 Entity 3 non-polymer

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

Entity 4 Entity 4 non-polymer

Description description	DI(HYDROXYETHYL)ETHER
Molecular weight formula_weight	106.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 5 Entity 5 non-polymer

Description description	2-(2-METHOXYETHOXY)ETHANOL
Molecular weight formula_weight	120.1 kDa
Source method src_method	syn
Copy count entity_count	1

Entity 6 Entity 6 water

Description description	water
Molecular weight formula_weight	18.0 kDa
Source method src_method	nat
Copy count entity_count	192

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6. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id	3q1iA01
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1120 — Arylsulfatase, C-terminal domain
Homologous superfamily homologous superfamily	30 — POLO box domain

Domain ID domain_id	3q1iA02
Class class	3 — Alpha Beta
Architecture architecture	30 — 2-Layer Sandwich
Topology topology	1120 — Arylsulfatase, C-terminal domain
Homologous superfamily homologous superfamily	30 — POLO box domain

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Unit-cell length a length_a	35.500 Å
Unit-cell length b length_b	51.500 Å
Unit-cell length c length_c	57.600 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	101.00 °
Unit-cell angle γ angle_gamma	90.00 °
Molecules per unit cell Z z_pdb	2

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

Resolution resolution	1.400 Å
Low-resolution limit resolution_low	56.540 Å
R factor r_factor	0.1984
R_work r_work	0.1972
R_free r_free	0.2216

Polo-like kinase I Polo-box domain in complex with FMPPPMSpSM phosphopeptide from TCERG1

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

Serine/threonine-protein kinase PLK1

State in the Current Structure

Other States of the Same Protein in the Database

peptide from Transcription elongation regulator 1

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

3q1i__assembly_1__model_1

3q1i__assembly_1__model_1 | I(q)

3q1i__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

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) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)

Polo-like kinase I Polo-box domain in complex with FMPPPMSpSM phosphopeptide from TCERG1

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

Serine/threonine-protein kinase PLK1

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

peptide from Transcription elongation regulator 1

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

3q1i__assembly_1__model_1

3q1i__assembly_1__model_1 | I(q)

3q1i__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

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) 2 domains

CATH v4.4 (2 domains)

7. Citations (1)