TDP-43 is a multifunctional RNA-binding protein that normally plays essential roles in RNA processing in the nucleus, but in ALS it is found most of the time in the cytoplasm where it aggregates and promotes formation of stress granules.

Question

BlackTom AI · Accepted Answer

The statement pertains to TDP-43, a multifunctional RNA-binding protein with key roles in RNA processing within the nucleus, and its mislocalization to the cytoplasm in ALS where it aggregates and promotes stress granule formation.
Option 1: True. This option aligns with current understanding: TDP-43 normally functions in nuclear RNA metabolism, and in amyotrophic lateral sclerosis (ALS) it is frequently found in the cytoplasm where it aggregates and contributes to stress granule dynamics. The description captures both its nuclear role and the pathogenic cytoplasmic mislocalization associated with disease.
Option 2: False. This would claim that the described phenomenon does not occur or that TDP-43 never relocates to the cytoplasm or promote stress granule formation in ALS. In reality, accumulating evidence shows cytoplasmic aggregation of TDP-43 in ALS patient tissues and models, linking it to stress granule biology and disease pathology, so this option contradicts established findings.
In summary, the statement accurately reflects the dual behavior of TDP-43: essential nuclear RNA processing under normal conditions, and cytoplasmic aggregation with stress granule involvement in ALS pathology. The False option misstates either the localization, function, or disease association, making it incorrect in light of current knowledge.

TDP-43 is a multifunctional RNA-binding protein that normally plays essential roles in RNA processing in the nucleus, but in ALS it is found most of the time in the cytoplasm where it aggregates and promotes formation of stress granules.判断题

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