9SYU | pdb_00009syu

shutdown state non-muscle myosin 2A heads region

PDB DOI: https://doi.org/10.2210/pdb9SYU/pdb
EM Map EMD-55354: EMDB EMDataResource

Classification: MOTOR PROTEIN
Organism(s): Homo sapiens, Gallus gallus, Bos taurus
Expression System: Spodoptera frugiperda
Mutation(s): No

Deposited: 2025-10-14 Released: 2025-10-22
Deposition Author(s): Peckham, M., Carrington, G.
Funding Organization(s): Wellcome Trust

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.98 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

This is version 1.1 of the entry. See complete history.

Literature

Cryo-EM structure of shutdown human nonmuscle myosin 2A.

Casas-Mao, D., Carrington, G., Peckham, M.

(2026) Sci Adv 12: eaed1858-eaed1858

PubMed: 41996489 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1126/sciadv.aed1858
Primary Citation Related Structures:
9SYU, 9SZR

PubMed Abstract:
Determining the high-resolution structure of the widely expressed nonmuscle myosin 2A (NM2A), in its dephosphorylated shutdown state, is important in understanding its regulation and disease roles. In shutdown molecules, the coiled-coil tail wraps around the myosin heads, preventing them from forming filaments and binding to actin. We have solved the shutdown structure of NM2A to a global resolution of 3.0 angstroms in the head region and 6.3 angstroms for the whole molecule. This reveals specific ionic interactions that explain why the path of the coiled coil and the shutdown mechanism for NM2A differ from those of β-cardiac myosin and provides key insight into how specific mutations likely destabilize the shutdown state, leading to disease.

Organizational Affiliation

Astbury Centre for Structural Molecular Biology & School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, Leeds, UK.

Macromolecule Content

Total Structure Weight: 982.49 kDa
Atom Count: 23,539
Modeled Residue Count: 2,900
Deposited Residue Count: 8,486
Unique protein chains: 3

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Isoform 1 of Myosin-9	A, B, G, H	1,960	Homo sapiens	Mutation(s): 0 Gene Names: MYH9
UniProt & NIH Common Fund Data Resources
Find proteins for P35579 (Homo sapiens) Explore P35579 Go to UniProtKB: P35579
PHAROS: P35579 GTEx: ENSG00000100345
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P35579
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Isoform 1 of Myosin light polypeptide 6	C, D	151	Gallus gallus	Mutation(s): 0 Gene Names: MYL6
UniProt
Find proteins for P02607 (Gallus gallus) Explore P02607 Go to UniProtKB: P02607
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P02607
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Myosin regulatory light polypeptide 9	E, F	172	Bos taurus	Mutation(s): 0 Gene Names: MYL9, MYRL2
UniProt
Find proteins for Q5E9E2 (Bos taurus) Explore Q5E9E2 Go to UniProtKB: Q5E9E2
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	Q5E9E2
Sequence Annotations Expand
Reference Sequence

Small Molecules

Ligands 3 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 I [auth A] SDF format, chain L [auth B] MOL2 format, chain I [auth A] MOL2 format, chain L [auth B] mmCIF format, chain I [auth A] mmCIF format, chain L [auth B]	I [auth A], L [auth B]	ADENOSINE-5'-DIPHOSPHATE C₁₀ H₁₅ N₅ O₁₀ P₂ XTWYTFMLZFPYCI-KQYNXXCUSA-N		Interactions Focus chain I [auth A] Focus chain L [auth B] Interactions & Density Focus chain I [auth A] Focus chain L [auth B]
PO4 (Subject of Investigation/LOI) Query on PO4 Download:Ideal Coordinates CCD File SDF format, chain J [auth A] SDF format, chain M [auth B] MOL2 format, chain J [auth A] MOL2 format, chain M [auth B] mmCIF format, chain J [auth A] mmCIF format, chain M [auth B]	J [auth A], M [auth B]	PHOSPHATE ION O₄ P NBIIXXVUZAFLBC-UHFFFAOYSA-K		Interactions Focus chain J [auth A] Focus chain M [auth B] Interactions & Density Focus chain J [auth A] Focus chain M [auth B]
MG (Subject of Investigation/LOI) Query on MG Download:Ideal Coordinates CCD File SDF format, chain K [auth A] SDF format, chain N [auth B] SDF format, chain O [auth E] SDF format, chain P [auth F] MOL2 format, chain K [auth A] MOL2 format, chain N [auth B] MOL2 format, chain O [auth E] MOL2 format, chain P [auth F] mmCIF format, chain K [auth A] mmCIF format, chain N [auth B] mmCIF format, chain O [auth E] mmCIF format, chain P [auth F]	K [auth A], N [auth B], O [auth E], P [auth F]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N		Interactions Focus chain K [auth A] Focus chain N [auth B] Focus chain O [auth E] Focus chain P [auth F] Interactions & Density Focus chain K [auth A] Focus chain N [auth B] Focus chain O [auth E] Focus chain P [auth F]