How do you calculate deletion?

You can find a deletion in a chromosome just by doing a cytogenetic or chromosome analysis, or a deletion in a gene you can find out by sequencing the DNA. So when you have a deletion, depending upon the size, it can have different effects.

What is multigenic deletion?

: involving, produced by, or controlled by two or more genes a multigenic disease caused by several genetically-linked mutations multigenic deletions.

What is the most common microdeletion syndrome?

DiGeorge syndrome is the most frequent microdeletion syndrome with an incidence range from 1:4000 to 1:10000, according to the literature [6-10].

What is xq28 deletion?

Deafness, dystonia, and cerebral hypomyelination is an X-linked recessive mental retardation syndrome characterized by almost no psychomotor development, dysmorphic facial features, sensorineural deafness, dystonia, pyramidal signs, and hypomyelination on brain imaging (summary by Cacciagli et al., 2013). [from OMIM]

Is deletion mutation harmful?

Because an insertion or deletion results in a frame-shift that changes the reading of subsequent codons and, therefore, alters the entire amino acid sequence that follows the mutation, insertions and deletions are usually more harmful than a substitution in which only a single amino acid is altered.

How does deletion affect a protein?

As a result, the protein made from the gene may not function properly. A deletion changes the DNA sequence by removing at least one nucleotide in a gene. Small deletions remove one or a few nucleotides within a gene, while larger deletions can remove an entire gene or several neighboring genes.

What causes micro deletion?

5q31. 3 microdeletion syndrome is caused by a chromosomal change in which a small piece of chromosome 5 is deleted in each cell. The deletion occurs on the long (q) arm of the chromosome at a position designated q31. 3.

Is Rett syndrome caused by deletion?

Approximately 80–90% of classic Rett syndrome patients harbor mutations in the coding region of MECP2, and approximately up to 15% of these mutations are gross deletions and other rearrangements, which can be detected by MLPA or southern blot (2–7).

What is the Xq28 gene?

Xq28 is a chromosome band and genetic marker situated at the tip of the X chromosome which has been studied since at least 1980. The band contains three distinct regions, totaling about 8 Mbp of genetic information.

When was the 12p deletion spectrum first reported?

The first report on the so-called “12p deletion spectrum” was published in 1975 by Magnelli and Therman [ 12, 13 ].

How many genes are deleted in interstitial 12p deletion?

Interstitial 12p deletion involving more than 40 genes in a patient with posnatal microcephaly, psychomotor delay, optic nerve atrophy and facial dysmorphisim. Meta Gene. 2014;2:72–82. doi: 10.1016/j.mgene.2013.10.014.

What is the terminal deletion of 12p associated with autism spectrum disorder?

A 1.5Mb terminal deletion of 12p associated with autism spectrum disorder. Gene. 2014;542 (1):83–6. doi: 10.1016/j.gene.2014.02.058. 9.

What is the centromeric breakpoint of the 12p deletion?

The centromeric breakpoint of the 12p deletion of our patient lies within a 119 kb segment located in the third intron of the CACNA1C gene. Activating mutations of this gene cause Timothy syndrome (OMIM 601005), a multiorgan disease characterized by lethal arrhythmias, long QT interval, webbing of fingers and toes,…