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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Inositol 1,4,5-trisphosphate receptor/GAPDH complex augments Ca2+ release via locally derived NADH.

NADH regulates the release of calcium from the endoplasmic reticulum by modulation of inositol 1,4,5-trisphosphate receptors (IP3R), accounting for the augmented calcium release of hypoxic cells. We report selective binding of IP3R to GAPDH, whose activity leads to the local generation of NADH to regulate intracellular calcium signaling. This interaction requires cysteines 992 and 995 of IP3R and C150 of GAPDH. Addition of native GAPDH and NAD+ to WT IP3R stimulates calcium release, whereas no stimulation occurs with C992S/995S IP3R that cannot bind GAPDH. Thus, the IP3R/GAPDH interaction likely enables cellular energy dynamics to impact calcium signaling.[1]

References

  1. Inositol 1,4,5-trisphosphate receptor/GAPDH complex augments Ca2+ release via locally derived NADH. Patterson, R.L., van Rossum, D.B., Kaplin, A.I., Barrow, R.K., Snyder, S.H. Proc. Natl. Acad. Sci. U.S.A. (2005) [Pubmed]
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