Disruption of Iqsec1 in mice leads to embryonic lethality with reduced large apical vacuoles in the visceral endoderm
Iqsec1 (IQ motif and Sec7 domain-containing protein 1), also known as BRAG2 (Brefeldin A-resistant Arf-GEF 2), is a guanine nucleotide exchange factor that regulates membrane trafficking, cytoskeletal organization, and signal transduction by activating class II and III ADP-ribosylation factors. To i...
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| creator | Sakagami, Hiroyuki Shiroshima, Tomoko Nemoto, Noriko Niimura, Tomoko Sugawara, Takeyuki Hara, Yoshinobu Saito, Koji Okubo, Tadashi Fukaya, Masahiro |
| description | Iqsec1 (IQ motif and Sec7 domain-containing protein 1), also known as BRAG2 (Brefeldin A-resistant Arf-GEF 2), is a guanine nucleotide exchange factor that regulates membrane trafficking, cytoskeletal organization, and signal transduction by activating class II and III ADP-ribosylation factors. To investigate the physiological role of Iqsec1 at the whole animal level, we generated Iqsec1-deficient mice using CRISPR/Cas9-mediated gene editing. Nearly all Iqsec1
mice (99%) exhibited embryonic lethality with severe growth retardation. Electron microscopy revealed that Iqsec1
embryos at embryonic day 8.5 lacked large apical vacuoles in visceral endoderm cells of the yolk sac, compared with controls. These findings suggest that Iqsec1 plays a critical role in embryogenesis, likely through regulation of membrane trafficking in visceral endoderm cells. |
| doi_str_mv | 10.1002/1873-3468.15058 |
| format | Article |
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mice (99%) exhibited embryonic lethality with severe growth retardation. Electron microscopy revealed that Iqsec1
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mice (99%) exhibited embryonic lethality with severe growth retardation. Electron microscopy revealed that Iqsec1
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mice (99%) exhibited embryonic lethality with severe growth retardation. Electron microscopy revealed that Iqsec1
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| title | Disruption of Iqsec1 in mice leads to embryonic lethality with reduced large apical vacuoles in the visceral endoderm |
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