This is one of 3 proteins that mediate the attachment of the 5S rRNA onto the large ribosomal subunit. Part of the 50S ribosomal subunit. Contacts the 5S rRNA. The N-terminal 91 amino acids are capable of binding to 5S rRNA and also of displacing full-length protein bound to 5S rRNA. The first 80 amino acids are not sufficient. Despite its considerably larger size this protein can substitute for the endogenous E.coli L25 protein in vitro. Belongs to the bacterial ribosomal protein bL25 family. CTC subfamily.