Abstract:
:60S ribosomal protein L35 (RPL35) is an important component of the 60S ribosomal subunit and has a role in protein translation and endoplasmic reticulum (ER) docking. However, few studies have investigated RPL35 in eukaryotes and much remains to be learned. Here, we analyzed the function of RPL35 in β-casein (CSN2) synthesis and secretion in bovine mammary epithelial cells (BMECs). We found that methionine (Met) could promote the expressions of CSN2 and RPL35. Analysis of overexpression and inhibition of RPL35 confirmed that it could mediate the Met signal and regulate CSN2 expression. The mechanism of CSN2 regulation by RPL35 was analyzed by coimmunoprecipitation (Co-IP), colocalization, fluorescence resonance energy transfer (FRET) and gene mutation. We found that RPL35 could control ribosome translational elongation during synthesis of CSN2 by interacting with eukaryotic translational elongation factor 2 (eEF2), and that eEF2 was the signaling molecule downstream of RPL35 controlling this process. RPL35 could also control the secretion of CSN2 by locating it to the ER. Taken together, these results revealed that, RPL35 was an important positive regulatory factor involving in the Met-mediated regulation of CSN2 translational elongation and secretion.
journal_name
Arch Biochem Biophysjournal_title
Archives of biochemistry and biophysicsauthors
Jiang N,Hu L,Liu C,Gao X,Zheng Sdoi
10.1016/j.abb.2015.08.006subject
Has Abstractpub_date
2015-10-01 00:00:00pages
130-9eissn
0003-9861issn
1096-0384pii
S0003-9861(15)30032-1journal_volume
583pub_type
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