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FMR1 (Fragile X Messenger Ribonucleoprotein 1) is a human gene [5] that codes for a protein called fragile X messenger ribonucleoprotein, or FMRP. [6] This protein, most commonly found in the brain, is essential for normal cognitive development and female reproductive function.
Location of the FMR1 gene on the X chromosome. Fragile X syndrome is a genetic disorder which occurs as a result of a mutation of the Fragile X Messenger Ribonucleoprotein 1 (FMR1) gene on the X chromosome, most commonly an increase in the number of CGG trinucleotide repeats in the 5' untranslated region of FMR1.
Fragile X-associated primary ovarian insufficiency (FXPOI) is the most common genetic cause of premature ovarian failure in women with a normal karyotype 46,XX. [1] The expansion of a CGG repeat in the 5' untranslated region of the FMR1 gene from the normal range of 5-45 repeats to the premutation range of 55-199 CGGs leads to risk of FXPOI for ovary-bearing individuals. [2]
FMR1 mRNA is found to be elevated in patients with FXTAS [7] in contrast to FXS, where the FMR1 gene is transcriptionally silenced via DNA methylation. [8] In both diseases the FMR1 gene product, Fragile X mental retardation protein (FMRP) is diminished, but in FXTAS this is believed to be mediated by RNA toxicity , while in FXS, FMRP is absent ...
In molecular biology, FMR1 antisense RNA 1 (FMR1-AS1), also known as ASFMR1 or FMR4, is a long non-coding RNA. The FMR1-AS1 gene overlaps, and is antisense to, the CGG repeat region of the FMR1 gene. [3] Its expression is upregulated in fragile X syndrome premutation carriers, and silenced in patients with fragile X syndrome.
Fragile X syndrome is a rare genetic disorder caused by mutation in FMR1 gene on X chromosome, resulting in decreased or lack of protein production that results in the dysregulation of the ...
In the case of Fragile X syndrome the repeated sequence makes the gene unstable and therefore silences the gene FMR1. [35] Because the gene resides on the X chromosome, females who have two X chromosomes are less effected than males who only have on X chromosome and one Y chromosome because the second X chromosome can compensate for the ...
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