田邊　賢司    Department   Research Institutes and Facilities, Research Institutes and Facilities    Position   Associate Professor
Article types	Original article
Language	English
Peer review	Peer reviewed
Title	The Clathrin Assembly Protein PICALM Is Required for Erythroid Maturation and Transferrin Internalization in Mice.
Journal	Formal name：PLoS ONE
Volume, Issue, Page	7,pp.e31854
Author and coauthor	Suzuki M., Tanaka H., Tanimura A., Tanabe K., Oe N., Rai S., Kon S., Fukumoto M., Takei K., Abe T., Matsumura I., Kanakura Y. and Watanabe T.
Publication date	2012
Summary	Phosphatidylinositol binding clathrin assembly protein (PICALM), also known as clathrin assembly lymphoid myeloid leukemia protein (CALM), was originally isolated as part of the fusion gene CALM/AF10, which results from the chromosomal translocation t(10;11)(p13;q14). CALM is sufficient to drive clathrin assembly in vitro on lipid monolayers and regulates clathrin-coated budding and the size and shape of the vesicles at the plasma membrane. However, the physiological role of CALM has yet to be elucidated. Here, the role of CALM in vivo was investigated using CALM-deficient mice. CALM-deficient mice exhibited retarded growth in utero and were dwarfed throughout their shortened life-spans. Moreover, CALM-deficient mice suffered from severe anemia, and the maturation and iron content in erythroid precursors were severely impaired. CALM-deficient erythroid cells and embryonic fibroblasts exhibited impaired clathrin-mediated endocytosis of transferrin. These results indicate that CALM is required for erythroid maturation and transferrin internalization in mice.