mRNA binding protein, member of CCCH zinc finger family; similar to mammalian Tis11, which activates transcription and has role in mRNA degradation; functions with Tis11p in regulation of iron homeostasis; represses translation in response to iron limitation, downregulating multiple transcripts required for mitochondrial translation and heme biosynthesis; inhibits the iron-dependent ribosome recycling factor, Rli1p