NAT CELL BIOL;5(16):425-33.(2014).
Sawa-Makarska, Justyna; Abert, Christine; Romanov, Julia; Zens, Bettina; Ibiricu, Iosune; Martens, Sascha.
In this paper we show that the Atg19 cargo receptor contains multiple interaction sites for the Atg8 protein in its C-terminus. Atg8 proteins decorate the autophagosomal membrane and collectively these multiple interaction sites for Atg8 mediate the bending of the membrane around autophagic cargo material. In vivo the close apposition of the autophagosomal membrane and the cargo will exclude non-cargo material from its delivery into the lysosomal system.
See also comments in Current Biology and Nature Cell Biology:
Autophagy: close contact keeps out the uninvited.
Selective autophagy goes exclusive.