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fragile X syndrome

See also: Renpenning syndrome.


A gene on chromosome Xq27.3 that encodes a protein which binds RNA, is associated with polysomes and may be involved in mRNA trafficking from the nucleus to the cytoplasm.

Molecular pathology
Expansion of the number of trinucleotide (CGG) repeats more than the usual number (up to 53) is associated with fragile X syndrome and a form of premature ovarian failure.


Abbreviation for fragile X syndrome.
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References in periodicals archive ?
XSense, Fragile X with Reflex, test identifies abnormalities of the fragile X mental retardation 1 (FMR1) gene residing on the X chromosome.
The research team claim to have developed specific and quantitative means of measuring levels of the fragile X mental retardation 1 (FMR1) protein (FMRP), which is mutated in fragile X syndrome.
Mutations in a gene called fragile X mental retardation 1 (FMR1) cause the syndrome.

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