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kynurenine-carboxyketoalkene

Candidate: toolkit item1 source documents7 linked claims
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Aliases

Kyn-CKA

Extracted Explainers

What the tool is doing

Kyn-CKA is presented as an electrophilic kynurenine metabolite that engages Keap1, increases Nrf2 abundance, and induces Nrf2 target genes such as NQO1. The abstract also states that it activates AhR.

Source 1DOI

Resources required

The reported mechanistic characterization used cellular thermal shift assays, purified recombinant Keap1 BTB domain and C151S mutant protein, and cell systems including MEFs and primary murine macrophages.

Source 1DOI

What problem it solves

It provides a source-backed endogenous-like electrophile for studying how Keap1 C151 targeting derepresses Nrf2 and contributes to anti-inflammatory responses.

Source 1DOI

What it does not solve

The abstract does not show that Kyn-CKA acts selectively only through Nrf2, because AhR is also activated and the exact in-cell adduct mapping is not described here.

Source 1DOI

Alternatives

The source contrasts Kyn-CKA with kynurenine and with the small-molecule thiol N-acetyl cysteine in reactivity comparisons.

Source 1DOI

Evidence Snippets

its electrophilic derivative kynurenine-carboxyketoalkene (Kyn-CKA) leads to an increase in the abundance of transcription factor Nrf2
Evidence 1Source 1DOIprovenance

Supporting Sources

Linked Claims

Claim 1activitysupports2025Source 1DOI

Both kynurenine and Kyn-CKA activate AhR.

Claim 2activitysupports2025Source 1DOI

Exposure to kynurenine and Kyn-CKA increases Nrf2 abundance and induces Nrf2 target genes including NQO1 in murine and human cells.

Claim 3biochemical specificitysupports2025Source 1DOI

Kyn-CKA reacts with wild-type but not C151S mutant Keap1 BTB domain and reacts faster with wild-type Keap1 BTB than with N-acetyl cysteine.

Claim 4genotype dependencesupports2025Source 1DOI

Kyn-CKA increases Nrf2 abundance and NQO1 expression in MEFs expressing wild-type Keap1, but this inducer potency is greatly diminished in C151S-Keap1 mutant MEFs.

Claim 5mechanismsupports2025Source 1DOI

Kyn-CKA targets C151 in Keap1 to derepress Nrf2.

Claim 6pathway requirementsupports2025Source 1DOI

Nrf2 is required for the acute anti-inflammatory activity of Kyn-CKA in primary murine bone marrow-derived macrophages, whereas AhR is dispensable.

Claim 7target engagementsupports2025Source 1DOI

In cellular thermal shift assays, Kyn-CKA increases the thermal stability of Keap1-mCherry but not free mCherry, indicating Keap1 target engagement.