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Dr. Huang, Yi-Shuian

Research Fellow
Division Chief
  • 02-2789-9174 (Lab) (Room No: N703)
  • 02-2652-3523 (Office)

  • Translational Control/ RNA 轉譯調控
  • Cap modification/ RNA-cap 修飾調控
  • Molecular & Cellular Neuroscience/ 分子與細胞神經生物學

Education and Positions:
  • Ph.D. University of Texas Southwestern Medical Center at Dallas

Highlight Detail

CMTR1-Catalyzed 2'-O-Ribose Methylation Controls Neuronal Development by Regulating Camk2α Expression Independent of RIG-I Signaling

Dr. Huang, Yi-Shuian
Cell Reports, Oct 20, 2020


Eukaryotic mRNAs are 5′ end capped with a 7-methylguanosine, which is important for processing and translation of mRNAs. Cap methyltransferase 1 (CMTR1) catalyzes 2′-O-ribose methylation of the first transcribed nucleotide (N1 2′-O-Me) to mask mRNAs from innate immune surveillance by retinoic-acid-inducible gene-I (RIG-I). Nevertheless, whether this modification regulates gene expression for neuronal functions remains unexplored. Here, we find that knockdown of CMTR1 impairs dendrite development independent of secretory cytokines and RIG-I signaling. Using transcriptomic analyses, we identify altered gene expression related to dendrite morphogenesis instead of RIG-I-activated interferon signaling, such as decreased calcium/calmodulin-dependent protein kinase 2α (Camk2α). In line with these molecular changes, dendritic complexity in CMTR1-insufficient neurons is rescued by ectopic expression of CaMK2α but not by inactivation of RIG-I signaling. We further generate brain-specific CMTR1-knockout mice to validate these findings in vivo. Our study reveals the indispensable role of CMTR1-catalyzed N1 2′-O-Me in gene regulation for brain development.