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Reviewed January 2007

What is the official name of the EP300 gene?

The official name of this gene is “E1A binding protein p300.”

EP300 is the gene's official symbol. The EP300 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 EP300 gene?

The EP300 gene provides instructions for making a protein called p300. This protein regulates the activity of many genes in tissues throughout the body. It plays an essential role in controlling cell growth and division and prompting cells to mature and assume specialized functions (differentiate). The p300 protein appears to be critical for normal development before and after birth.

The p300 protein carries out its function by activating transcription, the process of making a blueprint of a gene for protein production. Specifically, p300 connects transcription factors, which are proteins that start the transcription process, with the complex of proteins that carries out transcription. On the basis of this function, p300 is called a transcriptional coactivator.

Does the EP300 gene share characteristics with other genes?

The EP300 gene belongs to a family of genes called chromatin-modifying enzymes (chromatin-modifying enzymes).

A gene family is a group of genes that share important characteristics. Classifying individual genes into families helps researchers describe how genes are related to each other. For more information, see What are gene families? in the Handbook.

How are changes in the EP300 gene related to health conditions?

Rubinstein-Taybi syndrome - caused by mutations in the EP300 gene

Several mutations in the EP300 gene have been identified in people with Rubinstein-Taybi syndrome. These genetic changes are responsible for a small percentage of cases of this condition. Some mutations lead to the production of an abnormally small, nonfunctional version of the p300 protein, while other mutations prevent one copy of the gene from making any protein at all. These genetic changes all result in the loss of one functional copy of the EP300 gene in each cell, which reduces the amount of p300 protein by half. Although researchers are uncertain how a reduction in the amount of this protein leads to the specific features of Rubinstein-Taybi syndrome, it is clear that the loss of one copy of the EP300 gene disrupts normal development before and after birth.

cancers - associated with the EP300 gene

Rarely, chromosomal rearrangements (translocations) involving chromosome 22 have been associated with certain types of cancer. These genetic changes are somatic, which means they are acquired during a person's lifetime and are present only in certain cells. In cancer cells, translocations can disrupt the region of chromosome 22 that contains the EP300 gene. For example, researchers have found a translocation between chromosome 8 and chromosome 22 in several people with a cancer of blood-forming cells called acute myeloid leukemia (AML). Another translocation, involving chromosomes 11 and 22, has been found in a small number of people who have undergone cancer treatment. This chromosomal change is associated with the development of AML following chemotherapy for other forms of cancer.

Somatic mutations in the EP300 gene have been identified in several other types of cancer. These mutations prevent the gene from producing any functional protein. Cells without the p300 protein cannot effectively restrain growth and division, allowing cancerous tumors to develop and grow. Somatic mutations in the EP300 gene have been found in a small number of solid tumors, including cancers of the colon and rectum, stomach, breast, and pancreas. Studies suggest that EP300 mutations may also play a role in the development of some prostate cancers. These genetic changes could help predict whether prostate tumors will increase in size or spread to other parts of the body.

Genetics Home Reference provides information about prostate cancer, which is also associated with changes in the EP300 gene.

Where is the EP300 gene located?

Cytogenetic Location: 22q13.2

Molecular Location on chromosome 22: base pairs 41,092,610 to 41,180,077

(Homo sapiens Annotation Release 107, GRCh38.p2) (NCBIThis link leads to a site outside Genetics Home Reference.)

The EP300 gene is located on the long (q) arm of chromosome 22 at position 13.2.

The EP300 gene is located on the long (q) arm of chromosome 22 at position 13.2.

More precisely, the EP300 gene is located from base pair 41,092,610 to base pair 41,180,077 on chromosome 22.

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

Where can I find additional information about EP300?

You and your healthcare professional may find the following resources about EP300 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 EP300 gene or gene products?

  • E1A-associated protein p300
  • E1A-binding protein, 300kD
  • EP300_HUMAN
  • p300
  • p300 E1A-Associated Coactivator

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 EP300?

acute ; acute myeloid leukemia ; AML ; cancer ; cell ; chemotherapy ; chromosome ; colon ; domain ; gene ; histone ; leukemia ; myeloid ; pancreas ; prostate ; protein ; rectum ; stomach ; syndrome ; transcription ; translocation

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

See also Understanding Medical Terminology.

References (12 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: January 2007
Published: February 8, 2016