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GRP78 protects CHO cells from ribosylation
In this study, we found that cellular AGEs accumulate in Chinese hamster ovary (CHO) cells with increased Rib concentration and administration time. Mass spectrum analysis of isolated AGE-modified proteins from cell lysates showed that glucose-regulated protein 78 kD (GRP78) is one of the main ribosylated proteins. Co-immunoprecipitation assays further confirmed the interaction between AGEs and GRP78. Compared with d-glucose (Glc), Rib produced much more AGEs in cells. In kinetic studies, the first order rate constant of LDH released from CHO cells incubated with Rib was nearly 8-fold higher than that of Glc, suggesting th...
Source: Biochimica et Biophysica Acta (BBA) Molecular Cell Research - February 3, 2018 Category: Molecular Biology Source Type: research