2W4G

ISOMETRICALLY CONTRACTING INSECT ASYNCHRONOUS FLIGHT MUSCLE QUICK FROZEN AFTER A QUICK STRETCH STEP

• PDB DOI: https://doi.org/10.2210/pdb2W4G/pdb
• EM Map EMD-1584: EMDB EMDataResource

• Classification: CONTRACTILE PROTEIN
• Organism(s): Gallus gallus
• Mutation(s): No 


• Deposited: 2008-11-25 Released: 2010-08-25 
• Deposition Author(s): Wu, S., Liu, J., Reedy, M.C., Tregear, R.T., Winkler, H., Franzini-Armstrong, C., Sasaki, H., Lucaveche, C., Goldman, Y.E., Reedy, M.K., Taylor, K.A.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Electron Tomography of Cryofixed, Isometrically Contracting Insect Flight Muscle Reveals Novel Actin-Myosin Interactions

Wu, S., Liu, J., Reedy, M.C., Tregear, R.T., Winkler, H., Franzini-Armstrong, C., Sasaki, H., Lucaveche, C., Goldman, Y.E., Reedy, M.K., Taylor, K.A.

(2010) PLoS One 5: 12643

• PubMed: 20844746 
• DOI: https://doi.org/10.1371/journal.pone.0012643
• Primary Citation of Related Structures:  
  2W49, 2W4A, 2W4G, 2W4T


• PubMed Abstract: 
  

  Isometric muscle contraction, where force is generated without muscle shortening, is a molecular traffic jam in which the number of actin-attached motors is maximized and all states of motor action are trapped with consequently high heterogeneity. This heterogeneity is a major limitation to deciphering myosin conformational changes in situ.

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Organizational Affiliation: 

Institute of Molecular Biophysics, Florida State University, Tallahassee, Florida, United States of America.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 129.03 kDa 
• Atom Count: 8,758 
• Modelled Residue Count: 1,099 
• Deposited Residue Count: 1,135 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
MYOSIN REGULATORY LIGHT CHAIN 2, SKELETAL MUSCLE ISOFORM	A [auth B]	150	Gallus gallus	Mutation(s): 0
UniProt
Find proteins for P02609 (Gallus gallus) Explore P02609  Go to UniProtKB:  P02609

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
MYOSIN LIGHT CHAIN 3, SKELETAL MUSCLE ISOFORM	B [auth C]	145	Gallus gallus	Mutation(s): 0
UniProt
Find proteins for P02605 (Gallus gallus) Explore P02605  Go to UniProtKB:  P02605

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
MYOSIN HEAVY CHAIN, SKELETAL MUSCLE, ADULT	C [auth M]	840	Gallus gallus	Mutation(s): 0
UniProt
Find proteins for P13538 (Gallus gallus) Explore P13538  Go to UniProtKB:  P13538

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History 

Deposition Data

• Released Date: 2010-08-25 
Deposition Author(s): Wu, S., Liu, J., Reedy, M.C., Tregear, R.T., Winkler, H., Franzini-Armstrong, C., Sasaki, H., Lucaveche, C., Goldman, Y.E., Reedy, M.K., Taylor, K.A.

Revision History  

• Version 1.0: 2010-08-25
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-04-19
  Changes: Other
• Version 1.4: 2019-10-23
  Changes: Author supporting evidence, Data collection, Other