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- EMDB-13991: In situ structure of actomyosin complex in skeletal sarcomere -

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Basic information

Entry
Database: EMDB / ID: EMD-13991
TitleIn situ structure of actomyosin complex in skeletal sarcomere
Map data
Sample
  • Organelle or cellular component: Mouse psoas muscle myofibrils
    • Protein or peptide: Actin, alpha skeletal muscle
    • Protein or peptide: nebulin (mouse)
    • Protein or peptide: nebulin (mouse)
    • Protein or peptide: tropomyosin, alpha-1 (mouse)
    • Protein or peptide: tropomyosin, alpha-1 (mouse)
    • Protein or peptide: tropomyosin, alpha-1 (mouse)
    • Protein or peptide: Myosin-4
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: MAGNESIUM ION
Function / homology
Function and homology information


skeletal muscle fiber adaptation / Striated Muscle Contraction / : / myosin filament / myosin II complex / response to steroid hormone / microfilament motor activity / myofibril / mesenchyme migration / skeletal muscle thin filament assembly ...skeletal muscle fiber adaptation / Striated Muscle Contraction / : / myosin filament / myosin II complex / response to steroid hormone / microfilament motor activity / myofibril / mesenchyme migration / skeletal muscle thin filament assembly / striated muscle thin filament / response to mechanical stimulus / skeletal muscle fiber development / stress fiber / muscle contraction / filopodium / response to activity / actin filament / Hydrolases; Acting on acid anhydrides; Acting on acid anhydrides to facilitate cellular and subcellular movement / double-stranded RNA binding / actin filament binding / lamellipodium / cell body / calmodulin binding / hydrolase activity / positive regulation of gene expression / protein-containing complex / ATP binding / cytoplasm
Similarity search - Function
DNA repair protein XRCC4-like, C-terminal / Myosin tail / Myosin tail / Myosin N-terminal SH3-like domain / Myosin S1 fragment, N-terminal / Myosin, N-terminal, SH3-like / Myosin N-terminal SH3-like domain profile. / Myosin head, motor domain / Myosin head (motor domain) / Myosin motor domain profile. ...DNA repair protein XRCC4-like, C-terminal / Myosin tail / Myosin tail / Myosin N-terminal SH3-like domain / Myosin S1 fragment, N-terminal / Myosin, N-terminal, SH3-like / Myosin N-terminal SH3-like domain profile. / Myosin head, motor domain / Myosin head (motor domain) / Myosin motor domain profile. / Myosin. Large ATPases. / IQ motif profile. / Kinesin motor domain superfamily / Actins signature 1. / Actin, conserved site / Actins signature 2. / Actin/actin-like conserved site / Actins and actin-related proteins signature. / Actin / Actin family / Actin / ATPase, nucleotide binding domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
Actin, alpha skeletal muscle / Myosin-4
Similarity search - Component
Biological speciesMus musculus (house mouse) / house mouse (house mouse)
Methodsubtomogram averaging / cryo EM / Resolution: 6.6 Å
AuthorsWang Z / Grange M / Pospich S / Wagner T / Kho AL / Gautel M / Raunser S
Funding supportEuropean Union, 5 items
OrganizationGrant numberCountry
Max Planck SocietyEuropean Union
Wellcome Trust201543/Z/16/ZEuropean Union
European Research Council (ERC)856118European Union
Medical Research Council (MRC, United Kingdom)MR/R003106/1European Union
European Molecular Biology Organization (EMBO)European Union
CitationJournal: Science / Year: 2022
Title: Structures from intact myofibrils reveal mechanism of thin filament regulation through nebulin.
Authors: Zhexin Wang / Michael Grange / Sabrina Pospich / Thorsten Wagner / Ay Lin Kho / Mathias Gautel / Stefan Raunser /
Abstract: In skeletal muscle, nebulin stabilizes and regulates the length of thin filaments, but the underlying mechanism remains nebulous. In this work, we used cryo-electron tomography and subtomogram ...In skeletal muscle, nebulin stabilizes and regulates the length of thin filaments, but the underlying mechanism remains nebulous. In this work, we used cryo-electron tomography and subtomogram averaging to reveal structures of native nebulin bound to thin filaments within intact sarcomeres. This in situ reconstruction provided high-resolution details of the interaction between nebulin and actin, demonstrating the stabilizing role of nebulin. Myosin bound to the thin filaments exhibited different conformations of the neck domain, highlighting its inherent structural variability in muscle. Unexpectedly, nebulin did not interact with myosin or tropomyosin, but it did interact with a troponin T linker through two potential binding motifs on nebulin, explaining its regulatory role. Our structures support the role of nebulin as a thin filament "molecular ruler" and provide a molecular basis for studying nemaline myopathies.
History
DepositionDec 15, 2021-
Header (metadata) releaseFeb 16, 2022-
Map releaseFeb 16, 2022-
UpdateMar 2, 2022-
Current statusMar 2, 2022Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.005
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  • Surface view colored by cylindrical radius
  • Surface level: 0.005
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  • Surface view with fitted model
  • Atomic models: PDB-7qin
  • Surface level: 0.005
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7qin
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_13991.png

Downloads & links

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Map

FileDownload / File: emd_13991.map.gz / Format: CCP4 / Size: 30.5 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.73 Å/pix.
x 200 pix.
= 346. Å		1.73 Å/pix.
x 200 pix.
= 346. Å		1.73 Å/pix.
x 200 pix.
= 346. Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.73 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.005 / Movie #1: 0.005
Minimum - Maximum-0.012282768 - 0.032943204
Average (Standard dev.)0.00017489174 (±0.0011846893)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions200200200
Spacing200200200
CellA=B=C: 346.0 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.731.731.73
M x/y/z200200200
origin x/y/z0.0000.0000.000
length x/y/z346.000346.000346.000
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS200200200
D min/max/mean-0.0120.0330.000

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Supplemental data

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Mask #1

Fileemd_13991_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram (log scale)

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Half map: #2

Fileemd_13991_half_map_1.map
Projections & Slices
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Density Histograms

Histogram

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Half map: #1

Fileemd_13991_half_map_2.map
Projections & Slices
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Sample components

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Entire : Mouse psoas muscle myofibrils

EntireName: Mouse psoas muscle myofibrils
Components
  • Organelle or cellular component: Mouse psoas muscle myofibrils
    • Protein or peptide: Actin, alpha skeletal muscle
    • Protein or peptide: nebulin (mouse)
    • Protein or peptide: nebulin (mouse)
    • Protein or peptide: tropomyosin, alpha-1 (mouse)
    • Protein or peptide: tropomyosin, alpha-1 (mouse)
    • Protein or peptide: tropomyosin, alpha-1 (mouse)
    • Protein or peptide: Myosin-4
  • Ligand: ADENOSINE-5'-DIPHOSPHATE
  • Ligand: MAGNESIUM ION

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Supramolecule #1: Mouse psoas muscle myofibrils

SupramoleculeName: Mouse psoas muscle myofibrils / type: organelle_or_cellular_component / ID: 1 / Parent: 0 / Macromolecule list: #1-#7
Source (natural)Organism: Mus musculus (house mouse)

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Macromolecule #1: Actin, alpha skeletal muscle

MacromoleculeName: Actin, alpha skeletal muscle / type: protein_or_peptide / ID: 1 / Number of copies: 5 / Enantiomer: LEVO
Source (natural)Organism: house mouse (house mouse)
Molecular weightTheoretical: 41.387227 KDa
SequenceString: TTALVCDNGS GLVKAGFAGD DAPRAVFPSI VGRPRHQGVM VGMGQKDSYV GDEAQSKRGI LTLKYPIE(HIC)G IITNWD DME KIWHHTFYNE LRVAPEEHPT LLTEAPLNPK ANREKMTQIM FETFNVPAMY VAIQAVLSLY ASGRTTGIVL DSGDGVT HN VPIYEGYALP ...String:
TTALVCDNGS GLVKAGFAGD DAPRAVFPSI VGRPRHQGVM VGMGQKDSYV GDEAQSKRGI LTLKYPIE(HIC)G IITNWD DME KIWHHTFYNE LRVAPEEHPT LLTEAPLNPK ANREKMTQIM FETFNVPAMY VAIQAVLSLY ASGRTTGIVL DSGDGVT HN VPIYEGYALP HAIMRLDLAG RDLTDYLMKI LTERGYSFVT TAEREIVRDI KEKLCYVALD FENEMATAAS SSSLEKSY E LPDGQVITIG NERFRCPETL FQPSFIGMES AGIHETTYNS IMKCDIDIRK DLYANNVMSG GTTMYPGIAD RMQKEITAL APSTMKIKII APPERKYSVW IGGSILASLS TFQQMWITKQ EYDEAGPSIV HRKCF

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Macromolecule #2: nebulin (mouse)

MacromoleculeName: nebulin (mouse) / type: protein_or_peptide / ID: 2
Details: Model with conserved tyrosines of three nebulin simple repeats
Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: house mouse (house mouse)
Molecular weightTheoretical: 9.188235 KDa
SequenceString: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)Y(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) ...String:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)Y(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)Y (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)Y(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)

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Macromolecule #3: nebulin (mouse)

MacromoleculeName: nebulin (mouse) / type: protein_or_peptide / ID: 3
Details: Model with conserved tyrosines of two nebulin simple repeats
Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: house mouse (house mouse)
Molecular weightTheoretical: 6.131495 KDa
SequenceString: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)Y(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) ...String:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)Y(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)Y (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)

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Macromolecule #4: tropomyosin, alpha-1 (mouse)

MacromoleculeName: tropomyosin, alpha-1 (mouse) / type: protein_or_peptide / ID: 4 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: house mouse (house mouse)
Molecular weightTheoretical: 9.975288 KDa
SequenceString: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) ...String:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)

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Macromolecule #5: tropomyosin, alpha-1 (mouse)

MacromoleculeName: tropomyosin, alpha-1 (mouse) / type: protein_or_peptide / ID: 5 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: house mouse (house mouse)
Molecular weightTheoretical: 10.060393 KDa
SequenceString: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) ...String:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK) (UNK)(UNK)(UNK)(UNK)(UNK)

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Macromolecule #6: tropomyosin, alpha-1 (mouse)

MacromoleculeName: tropomyosin, alpha-1 (mouse) / type: protein_or_peptide / ID: 6 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: house mouse (house mouse)
Molecular weightTheoretical: 7.507245 KDa
SequenceString: (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) ...String:
(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)(UNK)(UNK) (UNK)(UNK)(UNK)

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Macromolecule #7: Myosin-4

MacromoleculeName: Myosin-4 / type: protein_or_peptide / ID: 7 / Number of copies: 2 / Enantiomer: LEVO
Source (natural)Organism: house mouse (house mouse)
Molecular weightTheoretical: 96.405609 KDa
SequenceString: MSSDAEMAVF GEAAPYLRKS EKERIEAQNK PFDAKSSVFV VDAKESYVKA TVQSREGGKV TAKTEGGATV TVKDDQVFSM NPPKYDKIE DMAMMTHLHE PAVLYNLKER YAAWMIYTYS GLFCVTVNPY KWLPVYNPEV VAAYRGKKRQ EAPPHIFSIS D NAYQFMLT ...String:
MSSDAEMAVF GEAAPYLRKS EKERIEAQNK PFDAKSSVFV VDAKESYVKA TVQSREGGKV TAKTEGGATV TVKDDQVFSM NPPKYDKIE DMAMMTHLHE PAVLYNLKER YAAWMIYTYS GLFCVTVNPY KWLPVYNPEV VAAYRGKKRQ EAPPHIFSIS D NAYQFMLT DRENQSILIT GESGAGKTVN TKRVIQYFAT IAVTGDKKKE EATSGKMQGT LEDQIISANP LLEAFGNAKT VR NDNSSRF GKFIRIHFGA TGKLASADIE TYLLEKSRVT FQLKAERSYH IFYQIMSNKK PELIEMLLIT TNPYDFAYVS QGE ITVPSI DDQEELMATD TAVDILGFSA DEKVAIYKLT GAVMHYGNMK FKQKQREEQA EPDGTEVADK AAYLTSLNSA DLLK ALCYP RVKVGNEYVT KGQTVQQVYN SVGALAKSMY EKMFLWMVTR INQQLDTKQP RQYFIGVLDI AGFEIFDFNT LEQLC INFT NEKLQQFFNH HMFVLEQEEY KKEGIDWEFI DFGMDLAACI ELIEKPMGIF SILEEECMFP KATDTSFKNK LYEQHL GKS NNFQKPKPAK GKAEAHFSLV HYAGTVDYNI IGWLDKNKDP LNETVVGLYQ KSGLKTLAFL FSGGQAAEAE GGGGKKG GK KKGSSFQTVS ALFRENLNKL MTNLKSTHPH FVRCLIPNET KTPGAMEHEL VLHQLRCNGV LEGIRICRKG FPSRILYA D FKQRYKVLNA SAIPEGQFID SKKASEKLLG SIDIDHTQYK FGHTKVFFKA GLLGTLEEMR DEKLAQLITR TQAVCRGYL MRVEFKKMME RRESIFCIQY NVRAFMNVKH WPWMKLYFKI KPLLKSAE

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Macromolecule #8: ADENOSINE-5'-DIPHOSPHATE

MacromoleculeName: ADENOSINE-5'-DIPHOSPHATE / type: ligand / ID: 8 / Number of copies: 5 / Formula: ADP
Molecular weightTheoretical: 427.201 Da
Chemical component information

ChemComp-ADP:
ADENOSINE-5'-DIPHOSPHATE / ADP, energy-carrying molecule*YM

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Macromolecule #9: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 9 / Number of copies: 5 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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Experimental details

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Structure determination

Methodcryo EM
Processingsubtomogram averaging
Aggregation statetissue

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Sample preparation

BufferpH: 7
VitrificationCryogen name: ETHANE / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Average electron dose: 3.4 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Calibrated defocus max: 5.0 µm / Calibrated defocus min: 2.4 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal magnification: 81000
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 6.6 Å / Resolution method: FSC 0.143 CUT-OFF / Number subtomograms used: 104302
ExtractionNumber tomograms: 48 / Number images used: 183260
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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Atomic model buiding 1

Initial model
PDB IDChain

5jlh

chain_id: A

3i5g

chain_id: A
DetailsMg was not refined but copied from the initial model
RefinementSpace: REAL / Overall B value: 75
Output model

PDB-7qin:
In situ structure of actomyosin complex in skeletal sarcomere

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