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Functional differentiation of endosomes in Arabidopsis cells
Author(s) -
Ueda Takashi,
Uemura Tomohiro,
Sato Masa H.,
Nakano Akihiko
Publication year - 2004
Publication title -
the plant journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.058
H-Index - 269
eISSN - 1365-313X
pISSN - 0960-7412
DOI - 10.1111/j.1365-313x.2004.02249.x
Subject(s) - endosome , endocytic cycle , endocytosis , arabidopsis , microbiology and biotechnology , biology , organelle , population , retromer , biochemistry , cell , gene , demography , sociology , mutant , intracellular
Summary Endocytosis plays an important role in plant physiology, but how endocytic organelles are organized remains unknown. We present the evidence that endosomes are functionally differentiated in Arabidopsis cells. Two types of Rab5‐related GTPases are localized on distinct population of endosomes in a partially overlapping manner. Ara7 and Rha1 are on an early type of endosomes with AtVamp727, where recycling of plasma membrane proteins occurs. In contrast, the plant‐unique Rab5, Ara6, resides on distinct endosomes with the prevacuolar SNAREs. Partially overlapping localization of Ara6 and Ara7/Rha1 with reciprocal gradients suggests maturation of endosomes from one to the other.