9B3R

The structure of human cardiac F-actin

• PDB DOI: https://doi.org/10.2210/pdb9B3R/pdb
• EM Map EMD-44154: EMDB EMDataResource

• Classification: CONTRACTILE PROTEIN
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2024-03-20 Released: 2024-05-29 
• Deposition Author(s): Doran, M.H., Sousa, D., Rynkiewicz, M.J., Lehman, W., Cammarato, A.
• Funding Organization(s): National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.50 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Structure of human cardiac actin

Doran, M.H., Rynkiewicz, M.J., Sousa, D., Cammarato, A., Lehman, W.

To be published.

Biological Assembly 1  

Global Symmetry: Helical - H  (Explore in 3D)
Global Stoichiometry: Homo 3-mer - A3 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 127.59 kDa 
• Atom Count: 8,808 
• Modelled Residue Count: 1,116 
• Deposited Residue Count: 1,131 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Actin, alpha cardiac muscle 1	A, B [auth D], C [auth E]	377	Homo sapiens	Mutation(s): 0  Gene Names: ACTC1, ACTC EC: 3.6.4
UniProt & NIH Common Fund Data Resources
Find proteins for P68032 (Homo sapiens) Explore P68032  Go to UniProtKB:  P68032
PHAROS:  P68032 GTEx:  ENSG00000159251

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ADP	E [auth A], G [auth D], I [auth E]	ADENOSINE-5'-DIPHOSPHATE C10 H15 N5 O10 P2 XTWYTFMLZFPYCI-KQYNXXCUSA-N
MG	D [auth A], F [auth D], H [auth E]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
HIC	A, B [auth D], C [auth E]	L-PEPTIDE LINKING	C7 H11 N3 O2		HIS

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.50 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-05-29 
Deposition Author(s): Doran, M.H., Sousa, D., Rynkiewicz, M.J., Lehman, W., Cammarato, A.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	1R56HL124091-01
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)	United States	5R01HL036153-33

Revision History  

• Version 1.0: 2024-05-29
  Type: Initial release