Tecpr1, or tectonin beta-propeller repeat containing 1, is a crucial protein involved in multiple autophagy-related pathways. Autophagy is a degradative mechanism in cells, and Tecpr1 plays a key role in non-canonical autophagy, also called conjugation of ATG8 to single membranes (CASM). It helps label damaged intracellular compartments with ATG8 family proteins, signaling danger from pathogens or toxic compounds [1,2,3,4].

In KO mouse models, Tecpr1-deficient MEFs were defective for selective autophagy, supporting increased intracellular multiplication of Shigella. Also, depolarized mitochondria and misfolded protein aggregates accumulated in these cells, indicating its importance in targeting bacterial pathogens for selective autophagy [5]. In P301S-tau transgenic mice, overexpression of Tecpr1 improved cognitive function via activation of autophagy in the early and late process [6].

In conclusion, Tecpr1 is essential for non-canonical autophagy and selective autophagy processes. Studies using KO mouse models have revealed its significance in host innate immune response against bacterial pathogens and in improving cognitive function in a tau-related disease model, providing insights into potential therapeutic targets for related diseases.