Novel p53 target gene FUCA1 encodes a fucosidase and regulates growth and survival of cancer cells

Issei Ezawa, Yuichiro Sawai, Tatsuya Kawase, Atsushi Okabe, Shuichi Tsutsumi, Hitoshi Ichikawa, Yuka Kobayashi, Fumio Tashiro, Hideo Namiki, Tadashi Kondo, Kentaro Semba, Hiroyuki Aburatani, Yoichi Taya, Hitoshi Nakagama, Rieko Ohki*


研究成果: Article査読

36 被引用数 (Scopus)


The tumor suppressor p53 functions by inducing the transcription of a collection of target genes. We previously attempted to identify p53 target genes by microarray expression and ChIP-sequencing analyses. In this study, we describe a novel p53 target gene, FUCA1, which encodes a fucosidase. Although fucosidase, α-l-1 (FUCA1) has been reported to be a lysosomal protein, we detected it outside of lysosomes and observed that its activity is highest at physiological pH. As there is a reported association between fucosylation and tumorigenesis, we investigated the potential role of FUCA1 in cancer. We found that overexpression of FUCA1, but not a mutant defective in enzyme activity, suppressed the growth of cancer cells and induced cell death. Furthermore, we showed that FUCA1 reduced fucosylation and activation of epidermal growth factor receptor, and concomitantly suppressed epidermal growth factor signaling pathways. FUCA1 loss-of-function mutations are found in several cancers, its expression is reduced in cancers of the large intestine, and low FUCA1 expression is associated with poorer prognosis in several cancers. These results show that protein defucosylation mediated by FUCA1 is involved in tumor suppression.

ジャーナルCancer Science
出版ステータスPublished - 2016 6月 1

ASJC Scopus subject areas

  • 腫瘍学
  • 癌研究


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