Autophagy Regulator:
– ATG7 is an E1-like enzyme crucial for the autophagy pathway.
– It participates in the conjugation systems that drive autophagosome formation (e.g., ATG12–ATG5 and LC3 lipidation systems).
• Elevated Expression:
– In certain cancers (e.g., pancreatic cancer, some subtypes of breast cancer), ATG7 can be upregulated.
– Increased ATG7 expression in some contexts is thought to help tumors survive under metabolic stress by enhancing autophagy.
• Reduced Expression or Loss-of-Function:
– In other contexts – for instance, in some liver cancers or specific lung cancers – reduced expression or inactivation of ATG7 has been reported.
– This reduction might lead to failure of effective autophagy in tumor-suppressive contexts.
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