SJFδ

 CAS No.: 2254609-23-7  Cat No.: BP-400065  Purity: ≥95% 4.5  

SJFδ is a VHL-based PROTAC degrader developed for selective degradation of the p38δ MAP kinase isoform. Public sources describe it as a compound in which a foretinib-derived kinase-binding warhead is connected through a linker to a VHL-recruiting ligand. The kinase-binding element recognizes p38-family kinases, while the VHL ligand recruits the VHL E3 ligase complex; the linker geometry biases productive degradation toward p38δ rather than other p38 isoforms. Mechanistically, SJFδ induces proximity between p38δ and VHL, enabling ubiquitination and proteasome-dependent depletion of p38δ protein. It is valuable for studying p38δ-specific signaling, MAPK isoform selectivity, kinase degrader design, linker-controlled degradation selectivity, VHL-based induced-proximity pharmacology, and experimental distinctions between broad kinase inhibition and selective isoform degradation.

SJFδ

Structure of 2254609-23-7

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Category
PROTAC
Molecular Formula
C62H63F2N7O12S
Molecular Weight
1168.27
Appearance
Off-white Solid

* For research and manufacturing use only. Not for human or clinical use.

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Popular Publications Citing BOC Sciences Products
Purity
≥95%
Solubility
Soluble in DMSO
Appearance
Off-white Solid
Storage
Store at 2-8°C for short term (days to weeks) or -20°C for long term (months to years)
Shipping
Room temperature in continental US; may vary elsewhere
IUPACName
1-N'-[3-fluoro-4-[7-[2-[2-[2-[2-[[[(2S,4R)-4-hydroxy-1-[(2S)-3-methyl-2-(3-oxo-1H-isoindol-2-yl)butanoyl]pyrrolidine-2-carbonyl]amino]methyl]-5-(4-methyl-1,3-thiazol-5-yl)phenoxy]ethoxy]ethoxy]ethoxy]-6-methoxyquinolin-4-yl]oxyphenyl]-1-N-(4-fluorophenyl)cyclopropane-1,1-dicarboxamide
Synonyms
SJF-6683; N-{3-Fluoro-4-[(7-{2-[2-(2-{2-[({(4R)-4-hydroxy-1-[(2S)-3-methyl-2-(1-oxo-1,3-dihydro-2H-isoindol-2-yl)butanoyl]-L-prolyl}amino)methyl]-5-(4-methyl-1,3-thiazol-5-yl)phenoxy}ethoxy)ethoxy]ethoxy}-6-methoxy-4-quinolinyl)oxy]phenyl}-N'-(4-fluorophenyl)-1,1-cyclopropanedicarboxamide; 1,1-Cyclopropanedicarboxamide, N-[4-[[7-[2-[2-[2-[2-[[[[(2S,4R)-1-[(2S)-2-(1,3-dihydro-1-oxo-2H-isoindol-2-yl)-3-methyl-1-oxobutyl]-4-hydroxy-2-pyrrolidinyl]carbonyl]amino]methyl]-5-(4-methyl-5-thiazolyl)phenoxy]ethoxy]ethoxy]ethoxy]-6-methoxy-4-quinolinyl]oxy]-3-fluorophenyl]-N'-(4-fluorophenyl)-
Density
1.389±0.06 g/cm3 (Predicted)
InChI Key
LYUUIIZKBMBNQV-CHOFKVETSA-N
InChI
InChI=1S/C62H63F2N7O12S/c1-36(2)55(71-33-40-7-5-6-8-45(40)58(71)74)59(75)70-34-44(72)29-49(70)57(73)66-32-39-10-9-38(56-37(3)67-35-84-56)27-52(39)81-25-23-79-21-22-80-24-26-82-54-31-48-46(30-53(54)78-4)50(17-20-65-48)83-51-16-15-43(28-47(51)64)69-61(77)62(18-19-62)60(76)68-42-13-11-41(63)12-14-42/h5-17,20,27-28,30-31,35-36,44,49,55,72H,18-19,21-26,29,32-34H2,1-4H3,(H,66,73)(H,68,76)(H,69,77)/t44-,49+,55+/m1/s1
SMILES
CC1=C(SC=N1)C2=CC(=C(C=C2)CNC(=O)C3CC(CN3C(=O)C(C(C)C)N4CC5=CC=CC=C5C4=O)O)OCCOCCOCCOC6=CC7=NC=CC(=C7C=C6OC)OC8=C(C=C(C=C8)NC(=O)C9(CC9)C(=O)NC1=CC=C(C=C1)F)F
Mechanism

Target: SJFδ selectively targets p38δ MAP kinase without degrading p38α, p38β, or p38γ.

Binding site: Its foretinib-derived kinase ligand binds the ATP pocket of p38δ.

Mechanism of action: SJFδ is a VHL-recruiting PROTAC optimized for selective degradation of p38δ MAP kinase. The molecule combines a foretinib-derived kinase-binding element with a von Hippel-Lindau ligand through a defined linker, enabling ternary-complex formation between p38δ and the VHL E3 ligase complex. This induced proximity drives ubiquitination and proteasome-mediated depletion with minimal degradation of other p38 isoforms. SJFδ is valuable for dissecting p38δ-specific signaling functions, separating isoform-selective degradation from broad kinase inhibition, and studying MAPK pathway biology in cellular systems.

Applications

• PROTAC-Mediated Kinase Degradation: SJFδ is utilized in research to selectively degrade kinases implicated in disease pathways. By employing the PROTAC mechanism, SJFδ facilitates the ubiquitination and subsequent proteasomal degradation of target kinases, providing a powerful tool for dissecting kinase function and validating therapeutic targets in cellular models.

• Targeted Protein Degradation in Cancer Research: SJFδ aids in the exploration of oncogenic protein degradation. Researchers leverage its ability to induce the degradation of proteins overexpressed in cancer cells, offering insights into tumor biology and potential avenues for novel cancer therapies through targeted protein degradation strategies.

• Investigating Protein-Protein Interactions: Utilizing SJFδ allows scientists to study the effects of degrading specific proteins involved in critical protein-protein interactions. This application helps elucidate the role of these interactions in cellular processes and diseases, advancing our understanding of complex biological networks.

• Advancing Drug Discovery: SJFδ serves as a pivotal tool in drug discovery research, enabling the identification of novel drug targets through the degradation of proteins previously considered "undruggable." By facilitating targeted protein degradation, SJFδ expands the scope of potential therapeutic interventions.

1. Differential PROTAC substrate specificity dictated by orientation of recruited E3 ligase.
Smith, B.E., Wang, S.L., Jaime-Figueroa, S., Harbin, A., Wang, J., Hamman, B.D. and Crews, C.M., 2019. Nature communications, 10(1), pp.1-13.
PROteolysis-TArgeting Chimeras (PROTACs) are hetero-bifunctional molecules that recruit an E3 ubiquitin ligase to a given substrate protein resulting in its targeted degradation. Many potent PROTACs with specificity for dissimilar targets have been developed; however, the factors governing degradation selectivity within closely-related protein families remain elusive. Here, we generate isoform-selective PROTACs for the p38 MAPK family using a single warhead (foretinib) and recruited E3 ligase (von Hippel-Lindau). Based on their distinct linker attachments and lengths, these two PROTACs differentially recruit VHL, resulting in degradation of p38α or p38δ. We characterize the role of ternary complex formation in driving selectivity, showing that it is necessary, but insufficient, for PROTAC-induced substrate ubiquitination. Lastly, we explore the p38δ:PROTAC:VHL complex to explain the different selectivity profiles of these PROTACs. Our work attributes the selective degradation of two closely-related proteins using the same warhead and E3 ligase to heretofore underappreciated aspects of the ternary complex model.

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Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
It is commonly abbreviated as: C1V1 = C2V2

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Tip: Chemical formula is case sensitive. C22H30N4O c22h30n40
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Historical Records: MZP-55 | RN486 | TC-E3 5032 | SJFδ

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