Involved in protein precursor import into chloroplasts. May be part of an intermediate translocation complex acting as a protein-conducting channel at the inner envelope. Part of the Tic complex. The nonsense codons at positions 71, 130, 348, 408, 537 and 813 are modified to sense codons. Belongs to the TIC214 family. Could be the product of a pseudogene. In A.formosae this protein is in two parts: ORF 1031 (N-terminal) and ORF 473 (C-terminal).