Component of the chloroplast ribosome (chloro-ribosome), a dedicated translation machinery responsible for the synthesis of chloroplast genome-encoded proteins, including proteins of the transcription and translation machinery and components of the photosynthetic apparatus. Component of the chloroplast large ribosomal subunit (LSU). Mature 70S chloroplast ribosomes of higher plants consist of a small (30S) and a large (50S) subunit. The 30S small subunit contains 1 molecule of ribosomal RNA (16S rRNA) and 24 different proteins. The 50S large subunit contains 3 rRNA molecules (23S, 5S and 4.5S rRNA) and 33 different proteins (PubMed:10874046, PubMed:28007896). uL22c binds 5S rRNA in vitro; the central segment of the protein (approximately amino acids 30 to 124) but not the last 28 amino acids are required for this binding (PubMed:8441674). Belongs to the universal ribosomal protein uL22 family.