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coatmer protein

Kohji Nishimura, Syouta Ishikawa, Erika Matsunami, Junji Yamauchi, Keiichi Homma, Christine Faulkner, Karl Oparka, Mitsuo Jisaka, Tsutomu Nagaya, Kazushige Yokota, Tsuyoshi Nakagawa
Protein-protein interactions (PPI) play key roles in various biological processes. The bimolecular fluorescence complementation (BiFC) assay is an excellent tool for routine PPI analyses in living cells. We developed new Gateway vectors for a high-throughput BiFC analysis of plants, adopting a monomeric Venus split just after the tenth β-strand, and analyzed the interaction between Arabidopsis thaliana coated vesicle coatmers, the clathrin heavy chain (CHC), and the clathrin light chain (CLC). In competitive BiFC tests, CLC interacted with CHC through a coiled-coil motif in the middle section of CLC...
2015: Bioscience, Biotechnology, and Biochemistry
Satoru Maruyama, Naoto Miyajima, Miyuki Bohgaki, Tadasuke Tsukiyama, Masahiko Shigemura, Katsuya Nonomura, Shigetsugu Hatakeyama
Ubiquitylation appears to be involved in the membrane trafficking system including endocytosis, exocytosis, and ER-to-Golgi transport. We found that PIRH2, which was identified as an interacting protein for androgen receptor or p53, interacts with and ubiquitylates the epsilon-subunit of coatmer complex, epsilon-COP. PIRH2 promotes the ubiquitylation of epsilon-COP in vitro and in vivo and consequently promotes the degradation of epsilon-COP. The interaction between PIRH2 and epsilon-COP is affected by the presence of androgen, and PIRH2 in the presence of androgen promotes ubiquitylation of epsilon-COP in vivo...
January 2008: Molecular and Cellular Biochemistry
Kei Suga, Hiroshi Hattori, Ayako Saito, Kimio Akagawa
It has been suggested that syntaxin 5 (Syx5) participates in vesicular transport. We examined the effects of Syx5 down-regulation on the morphology of the Golgi apparatus and the transport of vesicles in mammalian cells. Knockdown of the Syx5 gene resulted in Golgi fragmentation without changing the level of endoplasmic reticulum (ER)-resident proteins, other Golgi-SNAREs (soluble N-ethylmaleimide-sensitive factor-attachment protein receptors), and coatmer proteins. Strikingly, a major decrease in Syx5 expression barely affected the anterograde transport of vesicular stomatitis virus G (VSVG) protein to the plasma membrane...
August 15, 2005: FEBS Letters
N Ishihara, M Hamasaki, S Yokota, K Suzuki, Y Kamada, A Kihara, T Yoshimori, T Noda, Y Ohsumi
Double membrane structure, autophagosome, is formed de novo in the process of autophagy in the yeast Saccharomyces cerevisiae, and many Apg proteins participate in this process. To further understand autophagy, we analyzed the involvement of factors engaged in the secretory pathway. First, we showed that Sec18p (N-ethylmaleimide-sensitive fusion protein, NSF) and Vti1p (soluble N-ethylmaleimide-sensitive fusion protein attachment protein, SNARE), and soluble N-ethylmaleimide-sensitive fusion protein receptor are required for fusion of the autophagosome to the vacuole but are not involved in autophagosome formation...
November 2001: Molecular Biology of the Cell
T Katayama, K Imaizumi, M Tsuda, Y Mori, T Takagi, M Tohyama
To elucidate the molecular mechanisms underlying post-ischemic phenomena including delayed neuronal death, we screened for genes which were induced in the hippocampus after transient global ischemia in the Mongolian gerbil by a differential display method, and cloned a gerbil homologue of human ADP-ribosylation factor 4L (ARF4L). Although the physiological roles of ARF4L are unknown, it is likely that ARF4L participates in vesicle transport between the endoplasmic reticulum (ER) and Golgi complex as it contains a GTP binding site, myristoylation site and coatmer binding motif (KKXX)...
May 1998: Brain Research. Molecular Brain Research
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