Can changes in noncoding DNA affect health and development?

It is well established that changes in genes can alter a protein’s function in the body, potentially causing health problems . It is becoming clear that changes in regions of DNA that do not contain genes (noncoding DNA) can also lead to disease.
Many regions of noncoding DNA  play a role in the control of gene activity, determining when and where certain genes are turned on or off. By altering these sequences, a mutation in noncoding DNA can cause a protein to be expressed in the wrong place or at the wrong time or can reduce or eliminate expression of an important protein when it is needed. Not all changes in noncoding DNA have an impact on health, but those that alter the expression pattern of a protein that plays a critical role in the body can disrupt normal development or cause a health problem.
Mutations in noncoding DNA have been linked to developmental disorders such as isolated Pierre Robin sequence, which is caused by changes in enhancer elements that control the activity of the SOX9 gene. Noncoding DNA mutations have also been associated with several types of cancer. In addition to enhancer elements, these mutations can disrupt other regulatory elements including promoters, insulators, and silencers. Mutations in regions that provide instructions for making functional RNA molecules, such as transfer RNAs, microRNAs, or long noncoding RNAs, have also been implicated in disease.
The same types of genetic changes  that occur in genes or that alter the structure of chromosomes  can affect health and development when they occur in noncoding DNA. These mutations include changes in single DNA building blocks (point mutations), insertions, deletions, duplications, and translocations. Noncoding DNA mutations can be inherited from a parent or acquired during a person’s life.
Much is still unknown about how to identify functional regions of noncoding DNA and the role such regions play. As a result, linking genetic changes in noncoding DNA to their effects on certain genes and to health conditions is difficult. The roles of noncoding DNA on page 290 and the effects of genetic changes in it are growing areas of research.

مواضيع ذات صلة

Genes in the Cell Nucleus Control Protein Synthesis

RNA Proofreading

Regulation of Transcription by DNA Modification

Electrostatic Forces that Determine Protein Structure

A peptide bond

ادوات قطع ولحم الـ DNA

مصير الـ DNA الغريب في النظام البكتيري

A Common Mechanism for Splicing Reactions

آليات واهمية النقل transduction mechanisms

النقل transduction

Regulation of Transcription by Chromatin

RNA Polymerase Binding and Regulation by Transcription Factors