2 published verifications about LETM1 LETM1 ×
“Leucine zipper EF-hand-containing transmembrane protein 1 (LETM1) was initially identified through studies investigating the genetic basis of Wolf–Hirschhorn syndrome (WHS).”
The historical record supports this claim. LETM1 was first identified in gene-mapping and positional-cloning studies of the 4p16.3 region associated with Wolf–Hirschhorn syndrome, aimed at finding genes deleted in affected patients. A more precise wording would mention mapping of the WHS critical region, but the claim’s core point remains accurate.
“LETM1 is a proton-coupled mitochondrial calcium transport pathway that complements the mitochondrial calcium uniporter (MCU) and the mitochondrial sodium/calcium exchanger (NCLX) in controlling mitochondrial Ca2+ dynamics.”
Current evidence supports LETM1 as a proton-coupled contributor to mitochondrial Ca2+ handling alongside MCU and NCLX. Direct reconstitution and mechanistic studies support Ca2+/H+ antiport activity, but the field still debates whether that is LETM1’s main in-cell function or whether some Ca2+ effects are indirect through K+/H+ exchange and NCLX regulation.