

| Catalog No. | HD267012 |
|---|---|
| Description |
Recombinant Human QRICH1 Protein, N-His (HD267012) expressed in E. coli, spanning Leu473-His776. Purity: >90% by SDS-PAGE.
Highlights
|
| Expression system | E. coli |
| Accession | Q2TAL8 |
| Protein length | Leu473-His776 |
| Applications | ELISA, Immunogen, SDS-PAGE, WB, Bioactivity testing in progress |
| Species | Homo sapiens (Human) |
| Nature | Recombinant |
| Endotoxin level | Please contact with the lab for this information. |
| Purity | >90% as determined by SDS-PAGE. |
| Predicted molecular weight | 37.59 kDa |
| Form | Lyophilized |
| Storage buffer | Lyophilized from a solution in PBS pH 7.4, 1 mM EDTA, 4% Trehalose, 1% Mannitol. Please refer to the specific buffer information in the hardcopy of datasheet or the lot-specific COA. |
| Reconstitution | Reconstitute in sterile water for a stock solution. A copy of datasheet will be provided with the products, please refer to it for details. |
| Shipping | In general, proteins are provided as lyophilized powder/frozen liquid. They are shipped out with dry ice/blue ice unless customers require otherwise. |
| Stability and Storage | Use a manual defrost freezer and avoid repeated freeze thaw cycles. Store at 2 to 8°C for frequent use. Store at -20 to -80°C for twelve months from the date of receipt. |
| Alternate Names | Glutamine-rich protein 1, QRICH1, Transcriptional regulator QRICH1 |
| Background | Transcriptional regulator QRICH1 is a ~86 kDa protein. Transcriptional regulator that acts as a mediator of the integrated stress response (ISR) through transcriptional control of protein homeostasis under conditions of ER stress. Controls the outcome of the unfolded protein response (UPR) which is an ER-stress response pathway. ER stress induces QRICH1 translation by a ribosome translation re-initiation mechanism in response to EIF2S1/eIF-2-alpha phosphorylation, and stress-induced QRICH1 regulates a transcriptional program associated with protein translation, protein secretion-mediated proteotoxicity and cell death during the terminal UPR. May cooperate with ATF4 transcription factor signaling to regulate ER homeostasis which is critical for cell viability. Up-regulates CASP3/caspase-3 activity in epithelial cells under ER stress. 1. You, K. et al. (2021) Science (New York, N.Y.) 371. PMID: 33384352 2. Zhang, L. et al. (2025) Molecular medicine (Cambridge, Mass.) 31, 183. PMID: 40355839 3. Bianchi, D. et al. (2025) Science (New York, N.Y.) 389, eadv2861. PMID: 40608935 4. Lui, JC. et al. (2019) Clinical genetics 95, 160-164. PMID: 30281152 |
| Note | For research use only |
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