Molecular chaperone that interact with a ClpP-like protease involved in degradation of denatured proteins in the chloroplast (PubMed:21737456). The ATPase activity of CLPD is stimulated by CLPT1 (PubMed:25149061). Has no ADPase activity (PubMed:21737456). Interacts with transit peptides with a positional preference (PubMed:21737456, PubMed:22545953). Localization of the signal sequence at the N-terminal end of a protein seems mandatory for interaction to take place (PubMed:22545953). ATP + H2O = ADP + H(+) + phosphate Optimum pH is 7.5. Optimum temperature is 45 degrees Celsius. Homodimer and homohexamer (PubMed:21737456). Hexamerization upon addition of ATP (PubMed:21737456). Interacts with CLPT1 (PubMed:25149061). Stably associated with the import machinery (PubMed:21737456). Expressed in stems and leaves. By dehydration and salt stresses. Induced after one hour of dehydration-stress and reaches maximal levels after 10 hours. Induced by cold, ozone, senescence and dark-induced etiolation. Down-regulated by ozone (at protein level). Not induced by heat stress. No visible phenotype. CLPD is consistently found in two distinct forms, the full-length protein and a lower molecular weight form porcessed at the C-terminus. The processed form might be the active form and not the full-length protein. Belongs to the ClpA/ClpB family. ClpD subfamily.