2w4v

Isometrically contracting insect asynchronous flight muscle quick frozen after a quick release step

Method: ELECTRON MICROSCOPY

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

MYOSIN HEAVY CHAIN, STRIATED MUSCLE

OrganismNot specified

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	MYOSIN REGULATORY LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE × 1 （P13543） MYOSIN ESSENTIAL LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE × 1 （P07291）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MYS_AEQIR
Isoform	—
PDB entities	1
Chains and sequence ranges	Author chain C； PDBConstruct 1–831； UniProt 5–835

MYOSIN REGULATORY LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE

OrganismNot specified

UniProt P13543

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	MYOSIN HEAVY CHAIN, STRIATED MUSCLE × 1 （P24733） MYOSIN ESSENTIAL LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE × 1 （P07291）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MLR_AEQIR
Isoform	—
PDB entities	2
Chains and sequence ranges	Author chain Y； PDBConstruct 1–136； UniProt 16–151

MYOSIN ESSENTIAL LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE

OrganismNot specified

UniProt P07291

State in the Current Structure

Assembly	Physical composition	Protein state	Molecular copy count	Associated components	Data consistency
1	Protein heterocomplex	Heteromer	Protein 3	MYOSIN HEAVY CHAIN, STRIATED MUSCLE × 1 （P24733） MYOSIN REGULATORY LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE × 1 （P13543）	Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence

UniProt name	MLE_AEQIR
Isoform	—
PDB entities	3
Chains and sequence ranges	Author chain Z； PDBConstruct 1–151； UniProt 5–155

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	2w4v
Deposition date deposition_date	2008-12-02
Structure title title	Isometrically contracting insect asynchronous flight muscle quick frozen after a quick release step
Keywords keywords	;CONTRACTILE PROTEIN, TROPOMYOSIN, LIGHT CHAINS, ACTIN-BINDING, ISOMETRIC CONTRACTION, THIN FILAMENT, MOTOR PROTEIN, THICK FILAMENT, MUSCLE PROTEIN ;; CONTRACTILE PROTEIN
Experimental Method method	ELECTRON MICROSCOPY

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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.

2w4v__assembly_1__model_2

Assembly 1 · Model 2 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

2w4v__assembly_1__model_2 | I(q)

100 plotted points; both axes use logarithmic scales.

2w4v__assembly_1__model_2 | P(r) · Pending

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

Rg（Guinier）	52.17 Å
Rg (electron density)	53.71 Å
Total Rg	53.52 Å
Atom count	8501
Residues	1059
Excluded volume	151520 Å³
Maximum q	0.500 Å⁻¹

Assembly	Model	Structure unit	Oligomeric description	Status	CRYSOL	Actions
1	1	`2w4v__assembly_1__model_1`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	2	`2w4v__assembly_1__model_2`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	3	`2w4v__assembly_1__model_3`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	4	`2w4v__assembly_1__model_4`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	5	`2w4v__assembly_1__model_5`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	6	`2w4v__assembly_1__model_6`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	7	`2w4v__assembly_1__model_7`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	8	`2w4v__assembly_1__model_8`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	9	`2w4v__assembly_1__model_9`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	10	`2w4v__assembly_1__model_10`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	11	`2w4v__assembly_1__model_11`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	12	`2w4v__assembly_1__model_12`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	13	`2w4v__assembly_1__model_13`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	14	`2w4v__assembly_1__model_14`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	15	`2w4v__assembly_1__model_15`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	16	`2w4v__assembly_1__model_16`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	17	`2w4v__assembly_1__model_17`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	18	`2w4v__assembly_1__model_18`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	19	`2w4v__assembly_1__model_19`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	20	`2w4v__assembly_1__model_20`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	21	`2w4v__assembly_1__model_21`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	22	`2w4v__assembly_1__model_22`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	23	`2w4v__assembly_1__model_23`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	24	`2w4v__assembly_1__model_24`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	25	`2w4v__assembly_1__model_25`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	26	`2w4v__assembly_1__model_26`	trimeric （3）	Success	4.1.3-1-20251215 (887e7ef)	View Download
1	27	`2w4v__assembly_1__model_27`	trimeric （3）	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	MYOSIN HEAVY CHAIN, STRIATED MUSCLE
Molecular weight formula_weight	94843.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	C
Atom count atom_count	229527

FSDPDFQYLAVDRKKLMKEQTAAFDGKKNCWVPDEKEGFASAEIQSSKGDEITVKIVADSSTRTVKKDDIQSMNPPKFEKLEDMANMTYLNEASVLYNLRSRYTSGLIYTYSGLFCIAVNPYRRLPIYTDSVIAKYRGKRKTEIPPHLFSVADNAYQNMVTDRENQSCLITGESGAGKTENTKKVIMYLAKVACAVKKKDEEASDKKEGSLEDQIIQANPVLEAYGNAKTTRNNNSSRFGKFIRIHFGPTGKIAGADIETYLLEKSRVTYQQSAERNYHIFYQICSNAIPELNDVMLVTPDSGLYSFINQGCLTVDNIDDVEEFKLCDEAFDILGFTKEEKQSMFKCTASILHMGEMKFKQRPREEQAESDGTAEAEKVAFLCGINAGDLLKALLKPKVKVGTEMVTKGQNMNQVVNSVGALAKSLYDRMFNWLVRRVNKTLDTKAKRNYYIGVLDIAGFEIFDFNSFEQLCINYTNERLQQFFNHHMFILEQEEYKKEGIAWEFIDFGMDLQMCIDLIEKPMGILSILEEECMFPKADDKSFQDKLYQNHMGKNRMFTKPGKPTRPNQGPAHFELHHYAGNVPYSITGWLEKNKDPINENVVALLGASKEPLVAELFKAPEEPAGGGKKKKGKSSAFQTISAVHRESLNKLMKNLYSTHPHFVRCIIPNELKQPGLVDAELVLHQLQCNGVLEGIRICRKGFPSRLIYSEFKQRYSILAPNAIPQGFVDGKTVSEKILAGLQMDPAEYRLGTTKVFFKAGVLGNLEEMRDERLSKIISMFQAHIRGYLIRKAYKKLQDQRIGLSVIQRNIRKWLVLRNWQWWKLYSKVKP

Entity 2 Entity 2 polymer

Description description	MYOSIN REGULATORY LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE
Molecular weight formula_weight	15575.7 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	Y

KQIQEMKEAFSMIDVDRDGFVSKEDIKAISEQLGRAPDDKELTAMLKEAPGPLNFTMFLSIFSDKLSGTDSEETIRNAFAMFDEQETKKLNIEYIKDLLENMGDNFNKDEMRMTFKEAPVEGGKFDYVKFTAMIKG

Entity 3 Entity 3 polymer

Description description	MYOSIN ESSENTIAL LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE
Molecular weight formula_weight	17051.9 kDa
Source method src_method	nat
Copy count entity_count	1

Polymer Polymer

Polymer type type	polypeptide(L)
Chain IDs strand_id	Z

SQDEIDDLKDVFELFDFWDGRDGAVDAFKLGDVCRCLGINPRNEDVFAVGGTHKMGEKSLPFEEFLPAYEGLMDCEQGTFADYMEAFKTFDREGQGFISGAELRHVLTALGERLSDEDVDEIIKLTDLQEDLEGNVKYEDFVKKVMAGPYP

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Unit-cell length a length_a	1.000 Å
Unit-cell length b length_b	1.000 Å
Unit-cell length c length_c	1.000 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	1

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

Resolution resolution	35.000 Å
Low-resolution limit resolution_low	— Å
R factor r_factor	—
R_work r_work	—
R_free r_free	—

Isometrically contracting insect asynchronous flight muscle quick frozen after a quick release step

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

MYOSIN HEAVY CHAIN, STRIATED MUSCLE

State in the Current Structure

Other States of the Same Protein in the Database

MYOSIN REGULATORY LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE

State in the Current Structure

Other States of the Same Protein in the Database

MYOSIN ESSENTIAL LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE

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

2w4v__assembly_1__model_2

2w4v__assembly_1__model_2 | I(q)

2w4v__assembly_1__model_2 | 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

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

7. Citations (2)

Isometrically contracting insect asynchronous flight muscle quick frozen after a quick release step

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

MYOSIN HEAVY CHAIN, STRIATED MUSCLE

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

MYOSIN REGULATORY LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE

State in the Current Structure

Other States of the Same Protein in the Database

Monomer

Homodimer

Homotetramer

Other homooligomers

Heteromeric or nucleic-acid complex

MYOSIN ESSENTIAL LIGHT CHAIN, STRIATED ADDUCTOR MUSCLE

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

2w4v__assembly_1__model_2

2w4v__assembly_1__model_2 | I(q)

2w4v__assembly_1__model_2 | 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

Entity 2 Entity 2 polymer

Polymer Polymer

Entity 3 Entity 3 polymer

Polymer Polymer

7. Citations (2)