This entry represents the Telomere attrition and p53 response 1 protein (TAPR1) from eukaryotes, including TAPR1 from human (also known as C16orf72/HAPSTR1), which is a multistress-responsive protein that functions as a negative regulator of TP53/P53 in the cellular response to telomere erosion and probably also DNA damage. It may attenuate p53/TP53 activation through the E3 ubiquitin ligase HUWE1 which also promotes TAPR1's degradation [1,2]. This family also includes uncharacterised proteins from fungi, such as YJR056C from yeast.

1: A novel p53 regulator, C16ORF72/TAPR1, buffers against telomerase inhibition. Benslimane Y, Sanchez-Osuna M, Coulombe-Huntington J, Bertomeu T, Henry D, Huard C, Bonneil E, Thibault P, Tyers M, Harrington L; Aging Cell. 2021;20:e13331. PMID:33660365

2: C16orf72/HAPSTR1 is a molecular rheostat in an integrated network of stress response pathways. Amici DR, Ansel DJ, Metz KA, Smith RS, Phoumyvong CM, Gayatri S, Chamera T, Edwards SL, O'Hara BP, Srivastava S, Brockway S, Takagishi SR, Cho BK, Goo YA, Kelleher NL, Ben-Sahra I, Foltz DR, Li J, Mendillo ML; Proc Natl Acad Sci U S A. 2022;119:e2111262119. PMID:35776542