All Photos(1)
Synonym(s):
(E)-2-(2-Chlorobenzylidene)hydrazinecarboximidamide, Sephin 1
Empirical Formula (Hill Notation):
C8H9ClN4
CAS Number:
Molecular Weight:
196.64
MDL number:
UNSPSC Code:
12352200
PubChem Substance ID:
NACRES:
NA.77
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Quality Level
Assay
≥95% (HPLC)
form
powder
color
white to beige
solubility
DMSO: 20 mg/mL, clear
storage temp.
2-8°C
SMILES string
NC(N/N=C/C1=CC=CC=C1Cl)=N
InChI
1S/C8H9ClN4/c9-7-4-2-1-3-6(7)5-12-13-8(10)11/h1-5H,(H4,10,11,13)/b12-5+
InChI key
PDWJALXSRRSUHR-LFYBBSHMSA-N
Related Categories
Biochem/physiol Actions
In vivo studies using mice models show that sephin1 suppresses neurodegeneration, by preventing eIF2α (eukaryotic initiation factor 2) dephosphorylation.
Sephin1 is a selective inhibitor of a holophosphatase. It is a guanabez derivative that binds to and inhibits a regulatory subunit of the stress-induced protein phosphatase 1 (PPP1R15A), but not the constitutive PPP1R15B, and lacks α2-adrenergic activity. Phosphorylation of eIF2α, α subunit of eukaryotic translation initiation factor 2, reduces protein synthesis and prevents the accumulation of misfolded protein in the endoplasmic reticulum (ER). PPP1R15A recruits the serine/threonine-protein phosphatase PP1 to dephosphorylate eIF2α, so inhibiting PPP1R15A activity prolongs the phosphorylation of eIF2α and aids in its prevention of the accumulation of misfolded protein. In vitro Sephin1 protected cells from lethal protein misfolding and cytotoxic ER stress. In vivo sephin1 prevented two unrelated protein misfolding diseases in mice (Charchot-Marie-Tooth 1B and ALS).
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 3 Oral
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Certificates of Analysis (COA)
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PPP1R15A-mediated dephosphorylation of eIF2α is unaffected by Sephin1 or Guanabenz.
Crespillo-Casado A, et al.
eLife, 6, e26109-e26109 (2017)
Nadejda Capatina et al.
The Journal of physiology, 599(17), 4153-4181 (2021-07-17)
Endoplasmic reticulum (ER) stress promotes placental dysmorphogenesis and is associated with poor pregnancy outcomes. We show that unfolded protein response signalling pathways located in the ER drive differentiation of mouse trophoblast stem cells into trophoblast subtypes involved in development of
Juliette Humeau et al.
Cell death & disease, 11(6), 433-433 (2020-06-10)
The integrated stress response is characterized by the phosphorylation of eukaryotic initiation factor-2α (eIF2α) on serine 51 by one out of four specific kinases (EIF2AK1 to 4). Here we provide three series of evidence suggesting that macroautophagy (to which we
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