Open Access

CMP‑N‑acetylneuraminic acid synthetase interacts with fragile X related protein 1

  • Authors:
    • Yun Ma
    • Shuai Tian
    • Zongbao Wang
    • Changbo Wang
    • Xiaowei Chen
    • Wei Li
    • Yang Yang
    • Shuya He
  • View Affiliations

  • Published online on: June 23, 2016     https://doi.org/10.3892/mmr.2016.5438
  • Pages: 1501-1508
  • Copyright: © Ma et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

Metrics: Total Views: 0 (Spandidos Publications: | PMC Statistics: )
Total PDF Downloads: 0 (Spandidos Publications: | PMC Statistics: )


Abstract

Fragile X mental retardation protein (FMRP), fragile X related 1 protein (FXR1P) and FXR2P are the members of the FMR protein family. These proteins contain two KH domains and a RGG box, which are characteristic of RNA binding proteins. The absence of FMRP, causes fragile X syndrome (FXS), the leading cause of hereditary mental retardation. FXR1P is expressed throughout the body and important for normal muscle development, and its absence causes cardiac abnormality. To investigate the functions of FXR1P, a screen was performed to identify FXR1P‑interacting proteins and determine the biological effect of the interaction. The current study identified CMP‑N‑acetylneuraminic acid synthetase (CMAS) as an interacting protein using the yeast two‑hybrid system, and the interaction between FXR1P and CMAS was validated in yeast using a β‑galactosidase assay and growth studies with selective media. Furthermore, co‑immunoprecipitation was used to analyze the FXR1P/CMAS association and immunofluorescence microscopy was performed to detect expression and intracellular localization of the proteins. The results of the current study indicated that FXR1P and CMAS interact, and colocalize in the cytoplasm and the nucleus of HEK293T and HeLa cells. Accordingly, a fragile X related 1 (FXR1) gene overexpression vector was constructed to investigate the effect of FXR1 overexpression on the level of monosialotetrahexosylganglioside 1 (GM1). The results of the current study suggested that FXR1P is a tissue‑specific regulator of GM1 levels in SH‑SY5Y cells, but not in HEK293T cells. Taken together, the results initially indicate that FXR1P interacts with CMAS, and that FXR1P may enhance the activation of sialic acid via interaction with CMAS, and increase GM1 levels to affect the development of the nervous system, thus providing evidence for further research into the pathogenesis of FXS.
View Figures
View References

Related Articles

Journal Cover

August-2016
Volume 14 Issue 2

Print ISSN: 1791-2997
Online ISSN:1791-3004

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
x
Spandidos Publications style
Ma Y, Tian S, Wang Z, Wang C, Chen X, Li W, Yang Y and He S: CMP‑N‑acetylneuraminic acid synthetase interacts with fragile X related protein 1. Mol Med Rep 14: 1501-1508, 2016
APA
Ma, Y., Tian, S., Wang, Z., Wang, C., Chen, X., Li, W. ... He, S. (2016). CMP‑N‑acetylneuraminic acid synthetase interacts with fragile X related protein 1. Molecular Medicine Reports, 14, 1501-1508. https://doi.org/10.3892/mmr.2016.5438
MLA
Ma, Y., Tian, S., Wang, Z., Wang, C., Chen, X., Li, W., Yang, Y., He, S."CMP‑N‑acetylneuraminic acid synthetase interacts with fragile X related protein 1". Molecular Medicine Reports 14.2 (2016): 1501-1508.
Chicago
Ma, Y., Tian, S., Wang, Z., Wang, C., Chen, X., Li, W., Yang, Y., He, S."CMP‑N‑acetylneuraminic acid synthetase interacts with fragile X related protein 1". Molecular Medicine Reports 14, no. 2 (2016): 1501-1508. https://doi.org/10.3892/mmr.2016.5438