Kri1, also known as KRI1 interacting protein, is essential for viability in yeast and is localized to the nucleolus. It physically and functionally interacts with Krr1p to form a complex required for 40S ribosome biogenesis in the nucleolus [2].

In Caenorhabditis elegans, Kri1 (kri-1) is involved in processes related to germline-mediated longevity [6], and the C. elegans Kri1 ortholog KRI-1 exists in a complex with CCM-2 in the intestine, negatively regulating the ERK-5/MAPK pathway, which impacts zinc sequestration and apoptosis in the germline [7].

In esophageal carcinoma, Kri1 was identified as one of the ferroptosis-related genes, and its mutation frequency was the highest among certain genes studied. Kri1 was significantly correlated with tumor location, lymph node metastasis, and patient age [1].

In esophageal cancer, Kri1 was part of a prognostic RNA-binding protein signature, and the risk score related to this signature was significantly correlated with overall survival and response to chemotherapy [4].

In a patient with severe iron deficiency anemia, a rare mutation in KRI1 was identified, suggesting its potential role in intestinal iron loss [5].

In a genome-wide association study of stage III/IV grade C periodontitis, the SKAT analysis identified an interesting signal at KRI1, although its probability did not exceed the multiple-test correction [3].

In conclusion, Kri1 plays diverse and crucial roles in various biological processes and disease conditions. Studies in different genetic models like yeast and C. elegans have revealed its functions in ribosome biogenesis and regulation of signaling pathways related to longevity and apoptosis. In human diseases such as esophageal carcinoma, esophageal cancer, and potentially in severe anemia and periodontitis, Kri1 shows associations with disease-related factors, highlighting its significance in understanding disease mechanisms.