Involved in centrosome attachment to the nucleus. Required for zyg-12 localization to the nuclear envelope. Together with pot-1, it is required to anchor telomeres to the nuclear envelope in embryos (PubMed:24297748). The SUN domain may play a role in nuclear anchoring. RNAi-mediated knockdown disrupts both the localization of pot-1 and the anchoring of telomeres to the nuclear envelope in early embryos.