NCIt definition : Histidine-tRNA ligase, cytoplasmic (509 aa, 57 kDa) is encoded by the human HARS1
gene. This protein plays a role in the ATP-dependent ligation of histidine to the
3'-end of tRNA.;
Alternative definition : CDISC: An antigen encoded by the HARS1 gene that regulates histidyl-transfer RNA synthesis
(attaches histidine to tRNA). It can be considered as an autoantigen and is commonly
associated with the autoimmune diseases anti-synthetase syndrome, polymyositis and
dermatomyositis.;