Glucose monitoring in fission yeast via the Gpa2 galpha, the git5 Gbeta and the git3 putative glucose receptor.
Glucose monitoring in fission yeast via the Gpa2 galpha, the git5 Gbeta and the git3 putative glucose receptor.
复制标题
通过 Gpa2 galpha、git5 Gbeta 和 git3 假定的葡萄糖受体监测裂殖酵母中的葡萄糖。
DOI:
10.1093/genetics/156.2.513
复制
发表时间:
2000
期刊:
影响因子:
3.3
通讯作者:
Hoffman,CS
中科院分区:
文献类型:
--
作者:
Welton,RM;Hoffman,CS
The fission yeastSchizosaccharomyces pomberesponds to environmental glucose by activating adenylate cyclase. The resulting cAMP signal activates protein kinase A (PKA). PKA inhibits glucose starvation-induced processes, such as conjugation and meiosis, and the transcription of thefbp1gene that encodes the gluconeogenic enzyme fructose-1,6-bisphosphatase. We previously identified a collection ofgitgenes required for glucose repression offbp1transcription, includingpka1/git6, encoding the PKA catalytic subunit,git2/cyr1, encoding adenylate cyclase, and six “upstream” genes required for adenylate cyclase activation. Thegit8gene, identical togpa2, encodes the alpha subunit of a heterotrimeric guanine-nucleotide binding protein (Gα) whilegit5encodes a Gβ subunit. Multicopy suppression studies withgpa2+previously indicated thatS. pombeadenylate cyclase activation may resemble that of the mammalian type II enzyme with sequential activation by Gα followed by βγ. We show here that an activated allele ofgpa2(gpa2R176H, carrying a mutation in the coding region for the GTPase domain) fully suppresses mutations ingit3andgit5, leading to a refinement in our model. We describe the cloning ofgit3and show that it encodes a putative seven-transmembrane G protein-coupled receptor. Agit3deletion confers the same phenotypes as deletions of other components of the PKA pathway, including a germination delay, constitutivefbp1transcription, and starvation-independent conjugation. Since thegit3deletion is fully suppressed by thegpa2R176Hallele with respect tofbp1transcription,git3appears to encode a G protein-coupled glucose receptor responsible for adenylate cyclase activation inS. pombe.
登录
查看更多内容
影响因子:
4
作者:
Santo,PaolaDal;Blanchard,Barbara;Hoffman,CharlesS
通讯作者:
Hoffman,CharlesS
影响因子:
2.7
作者:
Hoffman,CS;Welton,R
通讯作者:
Welton,R
DOI:
--
发表时间:
1990
影响因子:
11.1
作者:
Tatsuya Maeda;Nobuyoshi Mochizuki;Masayuki Yamamoto
通讯作者:
Masayuki Yamamoto
影响因子:
3.5
作者:
Ohi,R;Feoktistova,A;Gould,KL
通讯作者:
Gould,KL
影响因子:
56.9
作者:
Wei-Jen Tang;A. Gilman
通讯作者:
Wei-Jen Tang;A. Gilman