Sar1 | secretion-associated and Ras-related protein 1

Sar1 belongs to a small GTPase superfamily and GTP binging activity. This protein is involved in intracellular protein transport. There are two different non-clathrin-coated vesicles that are responsible for transport between ER and the Golgi. Coat protein complexes involving membrane-associated GTP binging proteins – Arf1 and Sar1p for COPI and COPII are needed for formation of COP-coated vesicles. Sar1p is a cytosolic protein. It is temporarily recruited onto the membranes of the ER.

GST fusion of full length recombinant Sar1 of Arabidopsis thaliana Q8VYP7, At3g62560

store lyophilized/reconstituted at -20°C; once reconstituted make aliquots to avoid repeated freeze-thaw cycles. Please, remember to spin tubes briefly prior to opening them to avoid any losses that might occur from lyophilized material adhering to the cap or sides of the tubes.

western blot (WB), immunogold (IG)

AS08 327 | anti-Sec21p | gamma subunit, COP vesicles, Golgi marker, rabbit antibody

AS08 325 | anti-Arf1 | ADP-ribosylation factor 1 rabbit antibody

For immunogold experiments plant tissue has been fixed with GA in PFA/PIPES. LR White resin has been used. Tested species were: Triticum aestivum, Panicum miliaceum, Panicum maximum, Echinochloa crus-galli Eragrostis neomexicana, Digitaria sanguinalis. Publication in preparation.