Involved in spore wall assembly (PubMed:23966878). May be a component of the mitochondrial RNase MRP (MtMRP), a ribonucleoprotein endoribonuclease involved in the cleaving RNA transcripts to generate primers for DNA replication in mitochondria (PubMed:20086051). Causes growth arrest when highly overexpressed (PubMed:7762298). Component of the mitochondria-localized RNase mitochondrial RNA-processing (RNase MRP) composed of one single RNA encoded by the NME1 gene and at least 31 proteins. Absent in the nucleus-localized RNase MRP (NuMRP). A combined deletion of the OSW7 and SHE10 has reduced dityrosine incorporation in the outer spore wall. Present with 8640 molecules/cell in log phase SD medium. Belongs to the OSW/SHE family.