Sar1 GTPase plays an important role in COPII coat formation. Scientists generated a Sar1 GTPase mutant, in which the GTPase activity is lost. How this mutant would affect the COPII-mediated transport?
No effect would be observed.
COPII-coated vesicles can’t form at all.
COPII-coated vesicles can form, but the coat can’t be disassembled and thus the vesicles can’t fuse with the target membrane.
COPII-coated vesicles can form normally, but the coat can’t be disassembled. However, the coated vesicles can still dock and fused with the target membrane.
Sar1 GTPase plays an important role in COPII coat formation. Scientists generated a Sar1 GTPase mutant, in which the GTP
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