9M8U | pdb_00009m8u

Cryo-EM structure of human SIDT1

PDB DOI: https://doi.org/10.2210/pdb9M8U/pdb
EM Map EMD-63722: EMDB EMDataResource

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

Deposited: 2025-03-12 Released: 2026-03-18
Deposition Author(s): Liao, L., Sun, L.
Funding Organization(s): Chinese Academy of Sciences

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 3.79 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

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

Literature

SIDT1 is a calcium-associated CD8+ T cell suppressor and target for cancer immunotherapy

Hu, T., Han, Z., Liao, L., Zeng, Y., Ma, H., Huang, J., Chen, Y., Ye, J., Zhou, T., Zhang, W., Cang, C., Sun, L., Pan, W., Wang, J., Zhu, S.

To be published.

Macromolecule Content

Total Structure Weight: 188.88 kDa
Atom Count: 10,118
Modeled Residue Count: 1,248
Deposited Residue Count: 1,664
Unique protein chains: 1

Macromolecules

Find similar proteins by:

(by identity cutoff) | 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Isoform 2 of SID1 transmembrane family member 1	A, B	832	Homo sapiens	Mutation(s): 0 Gene Names: SIDT1
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NXL6 (Homo sapiens) Go to UniProtKB: Q9NXL6
PHAROS: Q9NXL6 GTEx: ENSG00000072858
Entity Groups
Sequence Clusters	30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt Group	Q9NXL6-2
Sequence Annotations Expand
Reference Sequence

Experimental Data & Validation

Experimental Data

Method: ELECTRON MICROSCOPY
Resolution: 3.79 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.13_2998:

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Released Date: 2026-03-18

Deposition Author(s):

Funding Organization	Location	Grant Number
Chinese Academy of Sciences	China	--

Revision History (Full details and data files)

Version 1.0: 2026-03-18
Type: Initial release

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.