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Mislocalization of FTD3-Associated Mutant CHMP2B to the Nucleus of Human Neurons Due to Loss of a Nuclear Export Signal

GSE315774 Homo sapiens (human) ChIP-seq / ATAC-seq (genome binding and open chromatin) 15 samples Submitted 2026/02/25 Platform GPL34284
At a glance

ChIP-seq / ATAC-seq (genome binding and open chromatin) · human · 15 samples

What it is
ChIP-seq / ATAC-seq (genome binding and open chromatin)Where proteins bind the genome, or which regions are open and active.
Organism
Homo sapiens (human)
Samples
15 samples
Data you can get
A processed table (series matrix) and supplementary files from NCBI; the raw sequencing reads from ENA. Which of these hold counts depends on the study, so check the file list.
Paper
Mislocalization of FTD3-associated mutant CHMP2B to the nucleus of human neurons due to loss of a nuclear export signalActa neuropathologica communications · 2026
Summary (written by the submitters)
Frontotemporal dementia linked to chromosome 3 (FTD3) is caused by a splice site point mutation in CHMP2B, resulting in the production of mutant proteins CHMP2BIntron5 and CHMP2BΔ10. Here, we found that wildtype CHMP2B (CHMP2BWT) is mostly present in the cytoplasm, but CHMP2BIntron5 is mislocalized to the nucleus of human induced pluripotent stem cell (iPSC)-derived cortical neurons.
Read the full summary ↓
To understand the underlying mechanism, we identified a previously unreported nuclear export signal (NES) in the C-terminus of CHMP2B. Functional assays, including CRM1 inhibition and site-directed mutagenesis of key hydrophobic residues, demonstrated that this NES motif is both necessary and sufficient for nuclear export of CHMP2BWT and ALS-associated CHMP2BQ206H, and its loss in CHMP2BIntron5 is responsible for the observed nuclear mislocalization. CHMP2BΔ10 remains in the cytoplasm due to the presence of an artificial NES in the C-terminus. These results reveal the presence of an NES in CHMP2B and highlight the need to dissect the gain-of-toxic nuclear functions of CHMP2BIntron5 in FTD3 pathogenesis.
Published in
Mislocalization of FTD3-associated mutant CHMP2B to the nucleus of human neurons due to loss of a nuclear export signal
Jun YW, Hass EP, Lee S et al. · Acta neuropathologica communications 2026 · PMID 41559796 · doi:10.1186/s40478-026-02222-0
This dataset
Download · which file do I need?

Direct links to NCBI and ENA, no account and no request form. Pick by what you want to do: take the small processed table to look, the supplementary files to re-analyse, or the original raw data to start over.

1 · Just have a look

Processed table

The series matrix: one table of values per sample as the submitters processed it. The smallest download, and it opens in Excel or R. Start here to see what the data look like.

2 · Re-analyse it

Supplementary files

The count tables and other files the authors uploaded. Take only the samples you need, or the whole study as GSE315774_RAW.tar (it can run to tens of gigabytes).

3 · Start from the raw reads

Raw sequencing reads

The original FASTQ files, straight from the sequencer, held at ENA. Large, and you align them yourself, so only choose this if you need to re-process the study from scratch.

What the files usually look like: Look for peak files (.bed, .narrowPeak) and signal tracks (.bigWig) among the supplementary files; the raw reads are on ENA.

Also filed as BioProject PRJNA1398938 and SRA study SRP660100. Searching any of these in the dataset finder brings you back here.

Samples in this study

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