What is DDX3X gene?
DDX3X syndrome is a recently identified genetic disorder that accounts for 1–3% of cases of unexplained developmental delay and/or intellectual disability (ID) in females, and is associated with motor and language delays, and autism spectrum disorder (ASD).
What causes DDX3X?
DDX3X syndrome occurs when one of the two copies of the DDX3X gene has lost its normal function. This is caused by a spelling mistake in the gene. Genes are instructions, which have important roles in our growth and development.
What is DDX4 protein?
DDX4 (DEAD-Box Helicase 4) is a Protein Coding gene. Diseases associated with DDX4 include Male Infertility and Infertility. Among its related pathways are Translational Control and Male infertility. Gene Ontology (GO) annotations related to this gene include nucleic acid binding and helicase activity.
How many kids have DDX3X?
Fewer than 500 people worldwide are known to have DDX3X syndrome, according to the DDX3X Foundation, a nonprofit dedicated to the condition. Many more may be as yet unidentified, particularly because the gene’s link to intellectual disability was discovered only about five years ago, Silver says.
What gene mutation causes intellectual disability?
HIVEP2-related intellectual disability is caused by mutations in the HIVEP2 gene. The protein produced from this gene is most abundant in the brain, where it controls the activity (expression) of genes involved in brain growth and development.
How is Vasa Mrna localized?
hawaiensis, Vasa transcript is uniformly distributed in the embryo and is localized depending on the stabilization of the 3’UTR (Untranslated Region to the germ line cells.
When was DDX3X syndrome discovered?
DDX3X Syndrome is a rare disease caused by a spontaneous mutation within a DDX3X gene at conception or can be inherited. The syndrome was discovered in the United States in 2014 and primarily affects girls due to its location on the X-chromosome, though there are some boys it has affected as well.
What is the most common inherited intellectual disability?
Fragile X syndrome (FXS) is the most common known cause of inherited intellectual disability. FXS affects both males and females. Females often have milder symptoms than males.
What is the most common inherited cause of intellectual disability?
That includes Fragile X syndrome (FXS), the most common inherited form of intellectual disability. FXS occurs in an array of forms, ranging from mild learning disabilities to more severe intellectual and developmental disabilities. It is the most common known cause of autism or autistic-like behaviors.
What is Vasa Drosophila?
Vasa (Vas) is a DEAD-box RNA-binding protein required in Drosophila at several steps of oogenesis and for primordial germ cell (PGC) specification. Vas associates with eukaryotic initiation factor 5B (eIF5B), and this interaction has been implicated in translational activation of gurken mRNA in the oocyte.
What is Nanos gene?
Nanos genes are mainly known for their evolutionarily preserved role in germ cell survival and pluripotency. Nanos proteins have been reported to bind the C-terminal RNA-binding domain of Pumilio to form a post-transcriptional repressor complex.
Does intellectual disability run in families?
The most common causes of intellectual disabilities are: Genetic conditions. Sometimes an intellectual disability is caused by abnormal genes inherited from parents, errors when genes combine, or other reasons. Examples of genetic conditions are Down syndrome, Fragile X syndrome, and phenylketonuria (PKU).
What is Vasa promoter?
The Vasa promoter is regulated through methylation. In cells were Vasa is transcribed successfully, the promoter is hypomethylated and in all other cells it is methylated. When Vasa is hypermethylated in testes, spermatogenesis defects may occur.
Where is the Nanos gene expressed?
During oogenesis, nanos function is required for the continued production of egg chambers, and nanos is expressed in the early germarium.
What is the most common heritable cause of intellectual disability?
Fragile X syndrome (FXS) is the most common inherited cause of intellectual disability worldwide. It is caused by a mutation of the FMR-1 (fragile-X mental retardation) gene located on the X chromosome.
Is Nanos a transcription factor?
nanos plays an important role during zygotic development in downregulating mitosis and transcription during the development of the Drosophila germline.
What is the pathophysiology of ddx3x-ndd?
Most female probands represent simplexcases (i.e., a single occurrence in a family) and have the disorder as the result of a de novopathogenic variant. Males. DDX3X-NDD in males is caused by either a pathogenic variantinherited from an unaffected heterozygousmother or a de novopathogenic variant.
Does DDX3X gene expression affect drug resistance?
However, reduced levels of DDX3X during drug treatment explains the development of drug resistant cells frequently detected with low MITF expression. Mutations of the DDX3X gene are associated with medulloblastoma. In melanoma the low expression of the gene is linked to a poor distant metastasis free survival.
How common are de novovariants in DDX3X?
Another study reported that among approximately 450 genes, the occurrence of de novovariants ranked third in DDX3X, after the genes ARID1Band ANKRD11[Wang et al 2018]. Genetically Related (Allelic) Disorders
Is there a genetic test for DDX3X NDD?
Parents of a female proband All female probands reported to date with DDX3X-NDD whose parents have undergone molecular genetic testinghave the disorder as a result of a de novoDDX3Xpathogenic variant. Molecular genetic testing is recommended for the parents of a probandwith an apparent de novopathogenic variant.