A novel structure of GPI anchored proteins-NT5E

ABSTRACT: GPI anchors many proteins to the cell surface. GPI precursor has three mannoses, all of which are modified by ethanolamine-phosphate (EthN-P). It has been believed that EthN-P on the third mannose is always used as a bridge to the protein and EthN-P on the second mannose is removed after GPI is attached to the protein. In fact, several GPI-anchored proteins are not appreciably reduced on cells defective in PIGG, which transfers EthN-P to the second mannose. Nevertheless, mutations in PIGG cause neuronal abnormalities. Here, we show that EthN-P on the second mannose is used as a preferential bridge for several GPI-anchored proteins. Our data modifies the current view of GPI anchors and provides mechanistic basis of PIGG deficiencies.

INSTRUMENT(S): LTQ Orbitrap Velos

ORGANISM(S): Homo Sapiens (human)

TISSUE(S): Permanent Cell Line Cell, Cell Culture

SUBMITTER: Yoshiko Murakami  

LAB HEAD: Taroh Kinoshita

PROVIDER: PXD029850 | Pride | 2022-05-31

REPOSITORIES: Pride