Cod1p/Spf1p is a P-type ATPase involved in ER function and Ca2+ homeostasis.
Cod1p/Spf1p is a P-type ATPase involved in ER function and Ca2+ homeostasis.
复制标题
DOI:
10.1083/jcb.200203052
复制
发表时间:
2002-06-10
期刊:
影响因子:
--
通讯作者:
Hampton RY
中科院分区:
文献类型:
--
作者:
Cronin SR;Rao R;Hampton RY
The internal environment of the ER is regulated to accommodate essential cellular processes, yet our understanding of this regulation remains incomplete. Cod1p/Spf1p belongs to the widely conserved, uncharacterized type V branch of P-type ATPases, a large family of ion pumps. Our previous work suggested Cod1p may function in the ER. Consistent with this hypothesis, we localized Cod1p to the ER membrane. The cod1Δ mutant disrupted cellular calcium homeostasis, causing increased transcription of calcium-regulated genes and a synergistic increase in cellular calcium when paired with disruption of the Golgi apparatus–localized Ca2+ pump Pmr1p. Deletion of COD1 also impaired ER function, causing constitutive activation of the unfolded protein response, hypersensitivity to the glycosylation inhibitor tunicamycin, and synthetic lethality with deletion of the unfolded protein response regulator HAC1. Expression of the Drosophila melanogaster homologue of Cod1p complemented the cod1Δ mutant. Finally, we demonstrated the ATPase activity of the purified protein. This study provides the first biochemical characterization of a type V P-type ATPase, implicates Cod1p in ER function and ion homeostasis, and indicates that these functions are conserved among Cod1p's metazoan homologues.
登录
查看更多内容
影响因子:
7.8
作者:
Chen, C Y;Ingram, M F;Rosal, P H;Graham, T R
通讯作者:
Graham, T R
DOI:
10.1083/jcb.124.3.351
发表时间:
1994-02
期刊:
The Journal of cell biology
影响因子:
--
作者:
Cunningham KW;Fink GR
通讯作者:
Fink GR
影响因子:
16
作者:
Frand, AR;Kaiser, CA
通讯作者:
Kaiser, CA
影响因子:
21.3
作者:
Bays, NW;Gardner, RG;Hampton, RY
通讯作者:
Hampton, RY
影响因子:
3.3
作者:
Dürr, G;Strayle, J;Rudolph, HK
通讯作者:
Rudolph, HK