6BIH

The Structure of the Actin-Smooth Muscle Myosin Motor Domain Complex in the Rigor State

  • Classification: MOTOR PROTEIN
  • Organism(s): Gallus gallus, Oryctolagus cuniculus
  • Expression System: Spodoptera frugiperda
  • Mutation(s): No 

  • Deposited: 2017-11-02 Released: 2018-09-19 
  • Deposition Author(s): Taylor, K.A., Banerjee, C., Hu, Z.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI), National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS), American Heart Association, National Institutes of Health/National Center for Research Resources (NIH/NCRR), National Institutes of Health/Office of the Director

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 2.2 of the entry. See complete history


Literature

The structure of the actin-smooth muscle myosin motor domain complex in the rigor state.

Banerjee, C.Hu, Z.Huang, Z.Warrington, J.A.Taylor, D.W.Trybus, K.M.Lowey, S.Taylor, K.A.

(2017) J Struct Biol 200: 325-333

  • DOI: https://doi.org/10.1016/j.jsb.2017.10.003
  • Primary Citation of Related Structures:  
    6BIH

  • PubMed Abstract: 

    Myosin-based motility utilizes catalysis of ATP to drive the relative sliding of F-actin and myosin. The earliest detailed model based on cryo-electron microscopy (cryoEM) and X-ray crystallography postulated that higher actin affinity and lever arm movement were coupled to closure of a feature of the myosin head dubbed the actin-binding cleft. Several studies since then using crystallography of myosin-V and cryoEM structures of F-actin bound myosin-I, -II and -V have provided details of this model. The smooth muscle myosin II interaction with F-actin may differ from those for striated and non-muscle myosin II due in part to different lengths of important surface loops. Here we report a ∼6 Å resolution reconstruction of F-actin decorated with the nucleotide-free recombinant smooth muscle myosin-II motor domain (MD) from images recorded using a direct electron detector. Resolution is highest for F-actin and the actin-myosin interface (3.5-4 Å) and lowest (∼6-7 Å) for those parts of the MD at the highest radius. Atomic models built into the F-actin density are quite comparable to those previously reported for rabbit muscle actin and show density from the bound ADP. The atomic model of the MD, is quite similar to a recently published structure of vertebrate non-muscle myosin II bound to F-actin and a crystal structure of nucleotide free myosin-V. Larger differences are observed when compared to the cryoEM structure of F-actin decorated with rabbit skeletal muscle myosin subfragment 1. The differences suggest less closure of the 50 kDa domain in the actin bound skeletal muscle myosin structure.


  • Organizational Affiliation

    Department of Computer Science, Florida State University, Tallahassee, FL 32306-4530, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Myosin-11A [auth H]798Gallus gallusMutation(s): 0 
Gene Names: MYH11
UniProt
Find proteins for P10587 (Gallus gallus)
Explore P10587 
Go to UniProtKB:  P10587
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP10587
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Actin, alpha skeletal muscleB [auth C]377Oryctolagus cuniculusMutation(s): 0 
UniProt
Find proteins for P68135 (Oryctolagus cuniculus)
Explore P68135 
Go to UniProtKB:  P68135
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68135
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ADP
Query on ADP

Download Ideal Coordinates CCD File 
C
ADENOSINE-5'-DIPHOSPHATE
C10 H15 N5 O10 P2
XTWYTFMLZFPYCI-KQYNXXCUSA-N
MG
Query on MG

Download Ideal Coordinates CCD File 
D [auth C]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 6.00 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTRosetta
RECONSTRUCTIONRELION1.2

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01 GM30598
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesP01 HL110869
National Institutes of Health/National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIH/NIAMS)United StatesR01 AR53975
American Heart AssociationUnited States15PRE25090150
National Institutes of Health/National Center for Research Resources (NIH/NCRR)United StatesS10 RR25080
National Institutes of Health/Office of the DirectorUnited StatesS10 OD018142

Revision History  (Full details and data files)

  • Version 1.0: 2018-09-19
    Type: Initial release
  • Version 2.0: 2018-10-17
    Changes: Atomic model, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2019-12-04
    Changes: Author supporting evidence
  • Version 2.2: 2024-03-13
    Changes: Data collection, Database references, Derived calculations