Expression of transcription factors KLF2 and KLF4 is induced by the mammalian Golgi stress response

Author:

Sasaki KanaeORCID,Sakamoto Miyu,Miyake Iona,Tanaka Reishi,Tanaka Ryuya,Tanaka Azusa,Terami Misaki,Komori Ryota,Taniguchi Mai,Wakabayashi Sadao,Sakurai Hajime Tajima,Yoshida HiderouORCID

Abstract

AbstractThe Golgi stress response is a homeostatic mechanism that augments Golgi function when Golgi function becomes insufficient (Golgi stress). Glycosylation of the core proteins of proteoglycans is one of the important functions of the Golgi. If the production of core proteins is increased and the amount of glycosylation enzymes for proteoglycans becomes insufficient (PG-type Golgi stress), the proteoglycan pathway of the Golgi stress response is activated, resulting in the transcriptional induction of glycosylation enzymes, including NDST2, HS6ST1 and GLCE. The transcriptional induction of these glycosylation enzymes is regulated by the enhancer element, PGSE-A; however, transcription factors that induce transcription from PGSE-A have not yet been identified. We herein proposed KLF2 and KLF4 as candidate transcription factors for transcriptional induction from PGSE-A, and revealed that their expression was up-regulated in response to PG-type Golgi stress. These results suggest that KLF2 and KLF4 are important regulators of the proteoglycan pathways of the mammalian Golgi stress response.

Publisher

Cold Spring Harbor Laboratory

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