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Reviewed November 2009

What is the official name of the YWHAE gene?

The official name of this gene is “tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, epsilon.”

YWHAE is the gene's official symbol. The YWHAE gene is also known by other names, listed below.

Read more about gene names and symbols on the About page.

What is the normal function of the YWHAE gene?

The YWHAE gene provides instructions for making the 14-3-3 epsilon (ε) protein, which is part of the large 14-3-3 protein family. Proteins in this family attach (bind) to other proteins involved in cell signaling. 14-3-3 proteins either turn on (activate) or turn off (inactivate) these other proteins. The 14-3-3ε protein helps to regulate a variety of processes including cell division and sensitivity to insulin, a hormone that helps control blood sugar levels.

The 14-3-3ε protein is active in tissues throughout the body, although its function is sometimes unclear. In the brain, this protein is involved in directing the movement of nerve cells (neuronal migration) by binding to other proteins involved in this process. It is thought that the 14-3-3ε protein is critical for proper neuronal migration and normal brain development.

How are changes in the YWHAE gene related to health conditions?

Miller-Dieker syndrome - associated with the YWHAE gene

The characteristic signs and symptoms of Miller-Dieker syndrome are caused by a deletion of genetic material near the end of the short (p) arm of chromosome 17. The chromosomal region that is typically deleted contains multiple genes, including the YWHAE gene. As a result of the deletion, people with this condition have only one copy of the YWHAE gene in each cell instead of the usual two copies.

A deletion of one copy of the YWHAE gene in each cell reduces the amount of 14-3-3ε protein by about half. A shortage of 14-3-3ε protein increases the severity of lissencephaly (a problem with brain development in which the surface of the brain is abnormally smooth) in people with Miller-Dieker syndrome.

other disorders - caused by mutations in the YWHAE gene

A deletion that only involves the YWHAE gene can also cause health problems. People with a YWHAE gene deletion are missing one copy of the gene in each cell, which reduces the amount of 14-3-3ε protein that is produced by about half. A deficiency (shortage) of this protein is thought to cause short stature; intellectual disability; and distinctive facial features including a prominent forehead, wide nasal bridge, and small jaw. People with a YWHAE gene deletion do not have lissencephaly but tend to have other brain abnormalities.

Where is the YWHAE gene located?

Cytogenetic Location: 17p13.3

Molecular Location on chromosome 17: base pairs 1,344,540 to 1,400,375

The YWHAE gene is located on the short (p) arm of chromosome 17 at position 13.3.

The YWHAE gene is located on the short (p) arm of chromosome 17 at position 13.3.

More precisely, the YWHAE gene is located from base pair 1,344,540 to base pair 1,400,375 on chromosome 17.

See How do geneticists indicate the location of a gene? in the Handbook.

Where can I find additional information about YWHAE?

You and your healthcare professional may find the following resources about YWHAE helpful.

You may also be interested in these resources, which are designed for genetics professionals and researchers.

What other names do people use for the YWHAE gene or gene products?

  • 14-3-3E
  • 14-3-3 epsilon
  • 1433E_HUMAN
  • KCIP-1
  • mitochondrial import stimulation factor L subunit
  • protein kinase C inhibitor protein-1
  • tyrosine 3-monooxygenase/tryptophan 5-monooxygenase activation protein, epsilon polypeptide
  • tyrosine 3/tryptophan 5 -monooxygenase activation protein, epsilon polypeptide

Where can I find general information about genes?

The Handbook provides basic information about genetics in clear language.

These links provide additional genetics resources that may be useful.

What glossary definitions help with understanding YWHAE?

cell ; cell division ; chromosome ; deficiency ; deletion ; disability ; gene ; gene deletion ; hormone ; insulin ; kinase ; neuronal migration ; protein ; sensitivity ; short stature ; stature ; subunit ; syndrome ; tryptophan ; tyrosine

You may find definitions for these and many other terms in the Genetics Home Reference Glossary.

See also Understanding Medical Terminology.

References (8 links)


The resources on this site should not be used as a substitute for professional medical care or advice. Users seeking information about a personal genetic disease, syndrome, or condition should consult with a qualified healthcare professional. See How can I find a genetics professional in my area? in the Handbook.

Reviewed: November 2009
Published: November 23, 2015