The abstract is read at the publisher; the summary is JClub's.
An 11-bp frameshifting deletion in the mitochondrial redox gene GLRX2 is highly enriched in two independently selected Darwin’s pigeon breeds and abolishes GLRX2 function.
- Why it matters: The molecular cause of Darwin’s remarkable inherited somersaulting behavior was unknown, despite evidence it is linked to brain and motor circuit dysfunction.
- What they did: The study combined brain phenotyping with genetic mapping to find the GLRX2 11-bp deletion, then tested GLRX2 deficiency in mice and zebrafish for mitochondrial redox dysfunction, oxidative stress, and impaired motor coordination.
- The result: Single-nucleus transcriptomics in pigeon cerebellum points to selective vulnerability of Golgi and Purkinje cells, with disrupted inhibitory signaling and synaptic remodeling, supporting gene loss as a substrate for behavioral evolution.
The findingWhy it mattersWhat they didThe result
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