Cited by 16Cancer-related Molecular PathwaysProtein Kinase Regulation and GTPase SignalingRedox biology and oxidative stress

Both Ser361 phosphorylation and the C-arrestin domain of thioredoxin interacting protein are important for cell cycle blockade at the G1/S checkpoint

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Kamitori, Kazuyo, Yamaguchi, Fuminori, Dong, Youyi, Hossain, Akram, Katagi, Ayako, Noguchi, Chisato, Hirata, Yuko, Tsukamoto, Ikuko +2 more·2018·FEBS Open Bio

Abstract

Thioredoxin interacting protein (TXNIP) is a novel tumor suppressor that is down‐regulated in several cancer tissues and tumor cell lines. Overexpression of TXNIP causes cell cycle arrest at the G1/S checkpoint in the hepatocellular carcinoma cell line HuH‐7. TXNIP contains putative phosphorylation sites, but the effects of its phosphorylation have not been fully characterized. TXNIP also contains two α‐arrestin domains (N‐arrestin and C‐arrestin) whose functions are not fully understood. Here, we reveal an association between TXNIP and cell cycle regulatory proteins (p27 kip1, Jun activation domain‐binding protein 1 (JAB1), Cdk2, and cyclin E), suggesting its participation in cell cycle regulation. We observed phosphorylation of TXNIP and used both in vivo and in vitro kinase assays to demonstrate that TXNIP can be phosphorylated by p38 mitogen‐activated protein kinase. Furthermore, we also identified Ser361 in TXNIP as one of the major phosphorylation sites. Cell cycle analysis showed that Ser361 phosphorylation participates in TXNIP‐mediated cell cycle arrest. In addition, the C‐arrestin domain may also play an important role in cell cycle arrest. We also showed that phosphorylation at Ser361 may be important for the association of TXNIP with JAB1 and that the C‐arrestin domain is necessary for the nuclear localization of this molecule. Collectively, these studies reveal that TXNIP participates in cell cycle regulation through association with regulatory proteins, especially JAB1, and that C‐arrestin‐dependent nuclear localization is important for this function. This work may facilitate the development of a new cancer therapy strategy that targets TXNIP as a key molecule inhibiting cancer cell growth via cell cycle blockade at the G1/S checkpoint.

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  1. [20]Slingerland J and Pagano M (2000) Regulation of the Cdk inhibitor p27 and its deregulation in cancer. J Cell Physiol 183, 10– 17. 10699961

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Authors
Kamitori, K., Yamaguchi, F., Dong, Y., Hossain, A., Katagi, A., Noguchi, C., Hirata, Y., Tsukamoto, I., Hatano, N., & Tokuda, M.
Affiliations
  • Kagawa University (JP)
  • Kobe University (JP)
Corresponding author
Tokuda, Masaaki
Venue
FEBS Open Bio
Publisher
Wiley
Published
2018-10
Volume
8
Issue
11
Pages
1804-1819
ISSN
2211-5463 (ISSN-L)
OpenAlex
W2891688761
Cited by
16
References
37
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 4
FWCI
0.66
Type
journal article
Language
en
Open access
Locations
  • FEBS Open Bio (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
Japan Society for the Promotion of Science (16K08497)
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
TXNIP, G1/S cell cycle checkpoint, cell cycle arrest, p38 MAPK, Jab1, p27, CDK2, cyclin E, nuclear localization, tumor suppressor, hepatocellular carcinoma, cancer therapy targets

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