7JH7 | pdb_00007jh7

cardiac actomyosin complex

PDB DOI: https://doi.org/10.2210/pdb7JH7/pdb
EM Map EMD-22335: EMDB EMDataResource

Classification: MOTOR PROTEIN
Organism(s): Sus scrofa
Mutation(s): No

Deposited: 2020-07-20 Released: 2020-10-28
Deposition Author(s): Galkin, V.E., Schroeder, G.F.
Funding Organization(s): National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 3.80 Å
Aggregation State: HELICAL ARRAY
Reconstruction Method: HELICAL

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

High-Resolution Cryo-EM Structure of the Cardiac Actomyosin Complex.

Risi, C., Schafer, L.U., Belknap, B., Pepper, I., White, H.D., Schroder, G.F., Galkin, V.E.

(2021) Structure 29: 50

PubMed: 33065066 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1016/j.str.2020.09.013
Primary Citation Related Structures:
7JH7

PubMed Abstract:
Heart contraction depends on a complicated array of interactions between sarcomeric proteins required to convert chemical energy into mechanical force. Cyclic interactions between actin and myosin molecules, controlled by troponin and tropomyosin, generate the sliding force between the actin-based thin and myosin-based thick filaments. Alterations in this sophisticated system due to missense mutations can lead to cardiovascular diseases. Numerous structural studies proposed pathological mechanisms of missense mutations at the myosin-myosin, actin-tropomyosin, and tropomyosin-troponin interfaces. However, despite the central role of actomyosin interactions a detailed structural description of the cardiac actomyosin interface remained unknown. Here, we report a cryo-EM structure of a cardiac actomyosin complex at 3.8 Å resolution. The structure reveals the molecular basis of cardiac diseases caused by missense mutations in myosin and actin proteins.

Organizational Affiliation

Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA 23507, USA.

Macromolecule Content

Total Structure Weight: 906.54 kDa
Atom Count: 33,924
Modeled Residue Count: 4,351
Deposited Residue Count: 7,960
Unique protein chains: 3

Macromolecules

Find similar proteins by:

| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Actin, alpha cardiac muscle 1	A, C [auth B], E [auth C], G [auth E], H [auth D]	377	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for B6VNT8 (Sus scrofa) Explore B6VNT8 Go to UniProtKB: B6VNT8
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	B6VNT8
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Myosin-7	B [auth F], D [auth G], F [auth H]	1,935	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for P79293 (Sus scrofa) Explore P79293 Go to UniProtKB: P79293
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P79293
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

| 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
tropomyosin	I, J	135	Sus scrofa	Mutation(s): 0

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
ADP (Subject of Investigation/LOI) Query on ADP Download:Ideal Coordinates CCD File SDF format, chain S [auth D] SDF format, chain Q [auth E] SDF format, chain O [auth C] SDF format, chain M [auth B] SDF format, chain K [auth A] MOL2 format, chain S [auth D] MOL2 format, chain Q [auth E] MOL2 format, chain O [auth C] MOL2 format, chain M [auth B] MOL2 format, chain K [auth A] mmCIF format, chain S [auth D] mmCIF format, chain Q [auth E] mmCIF format, chain O [auth C] mmCIF format, chain M [auth B] mmCIF format, chain K [auth A]	K [auth A], M [auth B], O [auth C], Q [auth E], S [auth D]	ADENOSINE-5'-DIPHOSPHATE C₁₀ H₁₅ N₅ O₁₀ P₂ XTWYTFMLZFPYCI-KQYNXXCUSA-N		Interactions Focus chain K [auth A] Focus chain M [auth B] Focus chain O [auth C] Focus chain Q [auth E] Focus chain S [auth D] Interactions & Density Focus chain K [auth A] Focus chain M [auth B] Focus chain O [auth C] Focus chain Q [auth E] Focus chain S [auth D]
MG (Subject of Investigation/LOI) Query on MG Download:Ideal Coordinates CCD File SDF format, chain T [auth D] SDF format, chain R [auth E] SDF format, chain P [auth C] SDF format, chain N [auth B] SDF format, chain L [auth A] MOL2 format, chain T [auth D] MOL2 format, chain R [auth E] MOL2 format, chain P [auth C] MOL2 format, chain N [auth B] MOL2 format, chain L [auth A] mmCIF format, chain T [auth D] mmCIF format, chain R [auth E] mmCIF format, chain P [auth C] mmCIF format, chain N [auth B] mmCIF format, chain L [auth A]	L [auth A], N [auth B], P [auth C], R [auth E], T [auth D]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain L [auth A] Focus chain N [auth B] Focus chain P [auth C] Focus chain R [auth E] Focus chain T [auth D] Interactions & Density Focus chain L [auth A] Focus chain N [auth B] Focus chain P [auth C] Focus chain R [auth E] Focus chain T [auth D]

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 3.80 Å
Aggregation State: HELICAL ARRAY
Reconstruction Method: HELICAL

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.17
RECONSTRUCTION	RELION	3.08

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2020-10-28

Deposition Author(s):

Galkin, V.E.

Schroeder, G.F.

Funding Organization	Location	Grant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	HL140925
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM116790
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	GM116788