Protein disulfide isomerase like 1-1 participates in the maturation of proglutelin within the endoplasmic reticulum in rice endosperm

Plant & Cell Physiology
Mio Satoh-CruzToshihiro Kumamaru

Abstract

The rice esp2 mutation was previously characterized by the abnormal accumulation of elevated levels of proglutelin and the absence of an endosperm-specific protein disulfide isomerase like (PDIL1-1). Here we show that Esp2 is the structural gene for PDIL1-1 and that this lumenal chaperone is asymmetrically distributed within the cortical endoplasmic reticulum (ER) and largely restricted to the cisternal ER. Temporal studies indicate that PDIL1-1 is essential for the maturation of proglutelin only when its rate of synthesis significantly exceeds its export from the ER, a condition resulting in its build up in the ER lumen and the induction of ER quality control processes which lower glutelin levels as well as those of the other storage proteins. As proglutelin is initially synthesized on the cisternal ER, its deposition within prolamine protein bodies in esp2 suggests that PDIL1-1 helps retain proglutelin in the cisternal ER lumen until it attains competence for ER export and, thereby, indirectly preventing heterotypic interactions with prolamine polypeptides.

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Citations

Oct 24, 2012·Protoplasma·Isabel Aller, Andreas J Meyer
Apr 28, 2011·Plant & Cell Physiology·Ai NagamineToshihiro Kumamaru
Nov 22, 2011·Plant & Cell Physiology·Kenji YamadaMikio Nishimura
Apr 24, 2014·BMC Plant Biology·Mireia BundóMaría Coca
Jul 3, 2015·International Journal of Molecular Sciences·Hye-Jung LeeYoung-Mi Kim
Jun 21, 2011·Plant Science : an International Journal of Experimental Plant Biology·Tomokazu UshijimaToshihiro Kumamaru
Sep 13, 2012·The Plant Journal : for Cell and Molecular Biology·Alessio LombardiAldo Ceriotti
Sep 24, 2015·Scientific Reports·Dandan QianLeqing Qu
Jan 29, 2013·Biochimica Et Biophysica Acta·Orit Hermesh, Ralf-Peter Jansen
Jun 28, 2017·International Journal of Molecular Sciences·Yifeng WangJian Zhang
Sep 20, 2018·The New Phytologist·Andreas J MeyerNicolas Rouhier
Nov 16, 2016·Frontiers in Plant Science·Kyoungwon ChoYoung-Mi Kim
Feb 5, 2019·Bioscience, Biotechnology, and Biochemistry·Reiko Urade
May 23, 2018·Annals of Botany·Huachun ShengLijun Wang
May 16, 2019·Plant Science : an International Journal of Experimental Plant Biology·Hong-Li ChouThomas W Okita
Sep 29, 2021·Journal of Integrative Plant Biology·Wei HeFeng Yu

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