SAXSdb — 7juv

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

Kinase suppressor of Ras 2

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	Dual specificity mitogen-activated protein kinase kinase 1 × 1 （P29678） PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 MAGNESIUM ION × 2 ;N-(3-{3-cyclopropyl-5-[(2-fluoro-4-iodophenyl)amino]-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydropyrido[4,3-d]pyrimidin-1(2H)-yl}phenyl)-N'-methylsulfuric diamide ; × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	KSR2_HUMAN
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain B； PDBConstruct 26–342； UniProt 634–950

Dual specificity mitogen-activated protein kinase kinase 1

Oryctolagus cuniculus

UniProt P29678

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 2	Kinase suppressor of Ras 2 × 1 （Q6VAB6） PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER × 2 MAGNESIUM ION × 2 ;N-(3-{3-cyclopropyl-5-[(2-fluoro-4-iodophenyl)amino]-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydropyrido[4,3-d]pyrimidin-1(2H)-yl}phenyl)-N'-methylsulfuric diamide ; × 1 water × 2	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MP2K1_RABIT
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain C； PDBConstruct 26–384； UniProt 35–393

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	7juv
Deposition date deposition_date	2020-08-20
Structure title title	Crystal Structure of KSR2:MEK1 in complex with AMP-PNP, and allosteric MEK inhibitor APS-9-95-1
Keywords keywords	Kinase, Pseudokinase, drug target, cell signaling and cancer, TRANSFERASE, TRANSFERASE-TRANSFERASE INHIBITOR complex; TRANSFERASE/TRANSFERASE INHIBITOR
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.

7juv__assembly_1__model_1

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

Download this curve (.dat)

7juv__assembly_1__model_1 | I(q)

100 plotted points; both axes use logarithmic scales.

7juv__assembly_1__model_1 | P(r) · Pending

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

Rg（Guinier）	27.97 Å
Rg (electron density)	27.22 Å
Total Rg	27.97 Å
Atom count	4765
Residues	581
Excluded volume	85360 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`7juv__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	Kinase suppressor of Ras 2
Molecular weight formula_weight	39748.7 kDa
EC 编号 ec_number	2.7.11.1
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	B
Atom count atom_count	4777

MSYYHHHHHHDYDIPTTENLYFQGAEMNLSLLSARSFPRKASQTSIFLQEWDIPFEQLEIGELIGKGRFGQVYHGRWHGEVAIRLIDIERDNEDQLKAFKREVMAYRQTRHENVVLFMGACMSPPHLAIITSLCKGRTLYSVVRDAKIVLDVNKTRQIAQEIVKGMGYLHAKGILHKDLKSKNVFYDNGKVVITDFGLFSISGVLQAGRREDKLRIQNGWLCHLAPEIIRQLSPDTEEDKLPFSKHSDVFALGTIWYELHAREWPFKTQPAEAIIWQMGTGMKPNLSQIGMGKEISDILLFCWAFEQEERPTFTKLMDMLEKLPKRNRRLSHPGHFWKSAEL

Source Source

Source organism organism	Homo sapiens
Common name common_name	Human
NCBI taxonomy ID ncbi_taxonomy_id	9606
Host organism host_organism	Spodoptera frugiperda

Entity 2 Entity 2 polymer

Description description	Dual specificity mitogen-activated protein kinase kinase 1
Molecular weight formula_weight	43119.4 kDa
EC 编号 ec_number	2.7.12.2
Source method src_method	man
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C

MSYYHHHHHHDYDIPTTENLYFQGAKKLEELELDEQQRKRLEAFLTQKQKVGELKDDDFEKISELGAGNGGVVFKVSHKPSGLVMARKLIHLEIKPAIRNQIIRELQVLHECNSPYIVGFYGAFYSDGEISICMEHMDGGSLDQVLKKAGRIPEQILGKVSIAVIKGLTYLREKHKIMHRDVKPSNILVNSRGEIKLCDFGVSGQLIDSMANSFVGTRSYMSPERLQGTHYSVQSDIWSMGLSLVEMAVGRYPIPPPDAKELELMFGCQVEGDAAETPPRPRTPGRPLSSYGMDSRPPMAIFELLDYIVNEPPPKLPSAVFSLEFQDFVNKCLIKNPAERADLKQLMVHAFIKRSDAEEVDFAGWLCSTIGLNQPSTPTHAAGV

Source Source

Source organism organism	Oryctolagus cuniculus
Common name common_name	Rabbit
NCBI taxonomy ID ncbi_taxonomy_id	9986
Host organism host_organism	Spodoptera frugiperda

Entity 3 Entity 3 non-polymer

Description description	PHOSPHOAMINOPHOSPHONIC ACID-ADENYLATE ESTER
Molecular weight formula_weight	506.2 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 4 Entity 4 non-polymer

Description description	MAGNESIUM ION
Molecular weight formula_weight	24.3 kDa
Source method src_method	syn
Copy count entity_count	2

Entity 5 Entity 5 non-polymer

Description description	;N-(3-{3-cyclopropyl-5-[(2-fluoro-4-iodophenyl)amino]-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydropyrido[4,3-d]pyrimidin-1(2H)-yl}phenyl)-N'-methylsulfuric diamide ;
Molecular weight formula_weight	666.5 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	12

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Unit-cell length a length_a	139.000 Å
Unit-cell length b length_b	139.000 Å
Unit-cell length c length_c	222.000 Å
Unit-cell angle α angle_alpha	90.00 °
Unit-cell angle β angle_beta	90.00 °
Unit-cell angle γ angle_gamma	120.00 °
Molecules per unit cell Z z_pdb	12

Space group space_group	P 61 2 2
Space-group number int_tables_number	178
Crystal system crystal_system	—

Resolution resolution	3.360 Å
Low-resolution limit resolution_low	29.770 Å
R factor r_factor	0.2425
R_work r_work	0.2419
R_free r_free	0.2546

Crystal Structure of KSR2:MEK1 in complex with AMP-PNP, and allosteric MEK inhibitor APS-9-95-1

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

Kinase suppressor of Ras 2

State in the Current Structure

Other States of the Same Protein in the Database

Dual specificity mitogen-activated protein kinase kinase 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

7juv__assembly_1__model_1

7juv__assembly_1__model_1 | I(q)

7juv__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 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

7. Citations (1)

Crystal Structure of KSR2:MEK1 in complex with AMP-PNP, and allosteric MEK inhibitor APS-9-95-1

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

Kinase suppressor of Ras 2

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

Dual specificity mitogen-activated protein kinase kinase 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

7juv__assembly_1__model_1

7juv__assembly_1__model_1 | I(q)

7juv__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 non-polymer

Entity 4 Entity 4 non-polymer

Entity 5 Entity 5 non-polymer

Entity 6 Entity 6 water

7. Citations (1)