aTyr Pharma, Inc. is a clinical-stage biotechnology company that discovers and develops product candidates translating tRNA synthetase biology into therapies for fibrosis and inflammation in the United States. Its lead candidate, efzofitimod, is a selective NRP2 modulator in a Phase 3 trial for pulmonary sarcoidosis, a Phase 2 trial for sarcoidosis and systemic sclerosis-associated interstitial lung diseases (ILDs), and development for other ILDs such as chronic hypersensitivity pneumonitis (CHP) and connective tissue disease-related ILD. The company is also developing ATYR0101, a fusion protein derived from an aspartyl-tRNA synthetase domain, in preclinical development for fibrosis, and ATYR0750, an alanyl-tRNA synthetase domain, for liver disorders. It has a collaboration and license agreement with Kyorin Pharmaceutical Co., Ltd. for the development and commercialization of efzofitimod for ILDs in Japan. aTyr Pharma, Inc. was incorporated in 2005 and is headquartered in San Diego, California.