9E4J | pdb_00009e4j

Human ASIC1a at pH 6.5 in complex with MitTx

PDB DOI: https://doi.org/10.2210/pdb9E4J/pdb
EM Map EMD-47512: EMDB EMDataResource

Classification: MEMBRANE PROTEIN
Organism(s): Homo sapiens, Micrurus tener tener
Expression System: Homo sapiens
Mutation(s): No

Deposited: 2024-10-24 Released: 2026-01-21
Deposition Author(s): Hartfield, K.A., Cahill, J., Baconguis, I.
Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 2.87 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

Validation slider image for 9E4J

This is version 1.0 of the entry. See complete history.

Literature

Conformational plasticity of human acid-sensing ion channel 1a

Cahill, J., Hartfield, K.A., Heusser, S.A., Ritter, N., Poulsen, M.H., Yoshioka, C., Pless, S.A., Baconguis, I.

To be published.

Macromolecule Content

Total Structure Weight: 243.41 kDa
Atom Count: 14,285
Modeled Residue Count: 1,778
Deposited Residue Count: 2,130
Unique protein chains: 3

Macromolecules

Find similar proteins by:

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Acid-sensing ion channel 1	A, B, C	531	Homo sapiens	Mutation(s): 0 Gene Names: ASIC1, ACCN2, BNAC2
UniProt & NIH Common Fund Data Resources
Find proteins for P78348 (Homo sapiens) Explore P78348 Go to UniProtKB: P78348
PHAROS: P78348 GTEx: ENSG00000110881
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P78348
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Kunitz-type neurotoxin MitTx-alpha	D, F, H	60	Micrurus tener tener	Mutation(s): 0
UniProt
Find proteins for G9I929 (Micrurus tener tener) Explore G9I929 Go to UniProtKB: G9I929
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	G9I929
Sequence Annotations Expand
Reference Sequence

Find similar proteins by:

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Basic phospholipase A2 homolog MitTx-beta	E, G, I	119	Micrurus tener tener	Mutation(s): 0
UniProt
Find proteins for G9I930 (Micrurus tener tener) Explore G9I930 Go to UniProtKB: G9I930
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	G9I930
Sequence Annotations Expand
Reference Sequence

Small Molecules

Modified Residues 1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
PCA Query on PCA	D, F, H	L-PEPTIDE LINKING	C₅ H₇ N O₃		GLN

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 2.87 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX
RECONSTRUCTION	cryoSPARC

Structure Validation

View Full Validation Report

View more in-depth experimental data

Entry History

& Funding Information

Deposition Data

Released Date: 2026-01-21

Deposition Author(s):

Hartfield, K.A.

Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R01GM138862

Revision History (Full details and data files)

Version 1.0: 2026-01-21
Type: Initial release

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RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.