Tetsuo Ohnishi, Yoshinori Tanizawa, Akiko Watanabe, Takemichi Nakamura, Hisako Ohba, Haruna Hirata, Chizu Kaneda, Yoshimi Iwayama, Takafumi Arimoto, Kazutada Watanabe, Ikue Mori and Takeo Yoshikawa Human myo-inositol monophosphatase 2 rescues the nematode thermotaxis mutant ttx-7 more efficiently than IMPA1: functional and evolutionary considerations of the two mammalian myo-inositol monophosphatase genes Journal of Neurochemistry 124
We previously cloned the second gene for human myo-inositol monophosphatase, IMPA2. TTX-7, nematode's IMPase, functions for thermotaxis behavior and normal localization of synaptic proteins. Although IMPA2 has been shown to be associated with multiple neuropsychiatric illnesses, Impa2 knockout mice exhibit no overt phenotypes. However, interestingly, it can rescue the nematode ttx-7 phenotype, suggesting an earlier evolutional origin of IMPA2 than IMPA1.
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