Structural biology of cation channels important for lysosomal calcium release

Ninghai Gan, Youxing Jiang

Research output: Contribution to journalArticlepeer-review

Abstract

Calcium is one of the most important second messengers in cells. The uptake and release of calcium ions are conducted by channels and transporters. Inside a eukaryotic cell, calcium is stored in intracellular organelles including the endoplasmic reticulum (ER), mitochondrion, and lysosome. Lysosomes are acid membrane-bounded organelles serving as the crucial degradation and recycling center of the cell. Lysosomes involve in multiple important signaling events, including nutrient sensing, lipid metabolism, and trafficking. Hitherto, two lysosomal cation channel families have been suggested to function as calcium release channels, namely the Two-pore Channel (TPC) family, and the Transient Receptor Potential Channel Mucolipin (TRPML) family. Additionally, a few plasma membrane calcium channels have also been found in the lysosomal membrane under certain circumstances. In this review, we will discuss the structural mechanism of the cation channels that may be important for lysosomal calcium release, primarily focusing on the TPCs and TRPMLs.

Original languageEnglish (US)
Article number102519
JournalCell Calcium
Volume101
DOIs
StatePublished - Jan 2022

ASJC Scopus subject areas

  • Physiology
  • Molecular Biology
  • Cell Biology

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