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The polymerized protein response (PPR) is activated by genetic variants that polymerize in the ER and is mediated by NFκBp50

GSE325308 Mus musculus (mouse) RNA-seq (gene expression) 34 samples Submitted 2026/03/26 Platform GPL34290Platform GPL24247
At a glance

RNA-seq (gene expression) · mouse · 34 samples

What it is
RNA-seq (gene expression)Gene activity measured by sequencing. The summary does not mention single-cell work, so this is most likely bulk: one average per sample, the usual starting point for comparing groups.
Organism
Mus musculus (mouse)
Samples
34 samples: 6 conditions, mostly with about 6 replicates eachGroups are read from the sample names, not from the paper. Check the list below.
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.
Summary (written by the submitters)
In previous studies we have shown that accumulation of the polymerogenic variant ATZ that causes α1-antitrypsin deficiency (ATD) activates NFκB DNA binding. Here we discovered that this response, which we are naming the polymerized protein response (PPR), is characterized by NFκB p50 homodimers, distinct from the p50/p65 heterodimers in the canonical NFκB inflammatory response and the unfolded protein response (UPR).
Read the full summary ↓
The PPR is also activated by other disease associated variants that polymerize in the ER whereas disease-associated variants that do not form polymers activate p50/p65 heterodimers and UPR. The PPR elicits a unique gene expression profile, including changes that stabilize p50 homodimers in cytoplasm and nucleus. The PPR is blocked by specific genetic substitutions within the luminal and cytosolic domains of Derlin-2 providing evidence that the ERAD retrotranslocation complex is a proximal transducer of this signaling mechanism. We hypothesize that the PPR is a proteostasis response pathway complementary to the UPR, designed to protect the cell from the specific proteotoxic effects of polymers that form aberrantly in the ER.
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 GSE325308_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: For RNA-seq the counts are usually a table among the supplementary files (look for 'counts', 'expression', 'FPKM' or 'TPM' in the file name). The series matrix of a sequencing study is sometimes nearly empty.

Also filed as BioProject PRJNA1439419 and SRA study SRP684906. Searching any of these in the dataset finder brings you back here.

Study design
6 conditions, mostly with about 6 replicates each
liver wildtype vehicle ×6 liver wildtype tnfa ×6 liver wt vehicle ×6 liver wt tunicamycin ×6 liver piz vehicle ×5 liver piz p50 ko vehicle ×5

Supports a between-group comparison across 34 samples.

How we read this: 6 replicated groups read from 34 sample titles; they account for 34 of them. These groups are guessed from the sample names, not taken from the paper, so check them against the sample list below before relying on them.

Samples in this study
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