During endoplasmic reticulum (ER) stress or when cellular ceramide levels increase, induces contacts between the ER and medial-Golgi complex to facilitate non-vesicular transport of ceramides from the ER to the Golgi complex where they are converted to complex sphingolipids, preventing toxic ceramide accumulation. Enriched at the nucleus-vacuole junction where it becomes increasingly concentrated as cells enter into the late-logarithmic growth phase (PubMed:22250200). During endoplasmic reticulum (ER) stress, localizes to ER-Golgi contacts (PubMed:28011845). The SMP-LTD domain is a barrel-like domain that can bind various types of glycerophospholipids in its interior and mediate their transfer between two adjacent bilayers. Present with 36500 molecules/cell in log phase SD medium.