Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Pivot Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Target Concepts:
Gene/Protein
Disease
Symptom
Drug
Enzyme
Compound
Query: EC:3.6.1.3 (
ATPase
)
65,361
document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)
Leucine-rich repeat-containing 8 (LRRC8) proteins have been proposed to evolutionarily originate from the combination of the channel protein pannexin, and a leucine-rich repeat (LRR) domain. Five paralogs of LRRC8, namely LRRC8A, LRRC8B, LRRC8C, LRRC8D and
LRRC8E
have been reported. LRRC8A has been shown to be instrumental in cell swelling. Here, we identify LRRC8B as a key player in the cellular Ca
2+
signaling network. Overexpression of human LRRC8B in HEK293 cells reduced the Ca
2+
level in the endoplasmic reticulum (ER). LRRC8B-overexpressing cells exhibited a lesser release of Ca
2+
from the ER in response to ATP, carbachol and intracellular administration of inositol (1,4,5)-trisphosphate (IP
3
). LRRC8B-knockdown cells showed a slower depletion of the ER Ca
2+
stores when sarco-endoplasmic reticulum Ca
2+
-
ATPase
was blocked with thapsigargin (TG), while overexpression of LRRC8B had the opposite effect. LRRC8B-overexpressing cells exhibited a higher level of store-operated Ca
2+
entry following store-depletion by TG. Collectively, LRRC8B participates in intracellular Ca
2+
homeostasis by acting as a leak channel in the ER. This study gives a fundamental understanding of the role of a novel protein in the elemental cellular process of ER Ca
2+
leak and expands the known roles for LRRC8 proteins.This article has an associated First Person interview with the first author of the paper.
...
PMID:Leucine-rich repeat-containing 8B protein is associated with the endoplasmic reticulum Ca
2+
leak in HEK293 cells. 2930 42
