Biological process

mitochondrion-ER attachment, mitochondrion-ER membrane tethering, mitochondrion-ER tethering, mitochondrion-endoplasmic reticulum attachment, mitochondrion-endoplasmic reticulum tethering

The attachment of a mitochondrion and an endoplasmic reticulum via molecular tethers that physically bridge their respective membranes and attach them to each other. The tethering may facilitate exchange of metabolites between the organelles.