PCNT Gene

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1		Lily Guo	+ 421 word(s)	421	2020-12-15 08:03:59

This entry is adapted from the peer-reviewed paper https://medlineplus.gov/genetics/gene/pcnt

pericentrin

genes

1. Introduction

The PCNT gene provides instructions for making a protein called pericentrin. Within cells, this protein is located in structures called centrosomes. Centrosomes play a role in cell division and the assembly of microtubules. Microtubules are fibers that help cells maintain their shape, assist in the process of cell division, and are essential for the transport of materials within cells.

Pericentrin acts as an anchoring protein, securing proteins to the centrosome that are necessary for its function. Through its interactions with these proteins, pericentrin is involved in the regulation of the cell cycle, which is the cell's way of replicating itself in an organized, step-by-step fashion.

2. Health Conditions Related to Genetic Changes

2.1. Microcephalic osteodysplastic primordial dwarfism type II

At least 30 mutations in the PCNT gene have been found to cause microcephalic osteodysplastic primordial dwarfism type II (MOPDII). These mutations result in the production of an abnormally short, nonfunctional pericentrin protein that cannot anchor other proteins to the centrosome. As a result, centrosomes cannot properly assemble microtubules, leading to disruption of the cell cycle and cell division. Impaired cell division causes a reduction in cell production, while disruption of the cell cycle can lead to cell death. This overall reduction in the number of cells leads to short bones, microcephaly, and the other signs and symptoms of MOPDII.

2.2. More About This Health Condition

Prostate cancer

2.3. Cancers

Gene mutations can be acquired during a person's lifetime and are present only in certain cells. These mutations are called somatic mutations, and they are not inherited. Somatic mutations in the PCNT gene can cause an increase in production of the pericentrin protein. Increased levels of pericentrin have been found in solid tumors (including prostate tumors) as well as cancers of blood-forming cells (leukemia and lymphoma). More pericentrin within the centrosome leads to overactivation of the cell cycle and increased cell division. This abnormal cell growth and division can eventually lead to a cancerous tumor.

2.4. Other disorders

Certain common genetic variations (polymorphisms) in the PCNT gene have been associated with an increased risk of developing psychiatric disorders such as schizophrenia and depression in some individuals. Similarly, increased levels of pericentrin have been found in some individuals with bipolar disorder. It is unclear how changes in the PCNT gene or increased levels of pericentrin protein are related to these disorders. A large number of genetic and environmental factors, most of which remain unknown, likely determine the risk of developing these complex conditions.

3. Other Names for This Gene

PCN
PCNT2
PCNT_HUMAN
PCNTB
pericentrin B
pericentrin-2

References

Delaval B, Doxsey SJ. Pericentrin in cellular function and disease. J CellBiol. 2010 Jan 25;188(2):181-90. doi: 10.1083/jcb.200908114.Review.
Rauch A, Thiel CT, Schindler D, Wick U, Crow YJ, Ekici AB, van Essen AJ,Goecke TO, Al-Gazali L, Chrzanowska KH, Zweier C, Brunner HG, Becker K, Curry CJ,Dallapiccola B, Devriendt K, Dörfler A, Kinning E, Megarbane A, Meinecke P,Semple RK, Spranger S, Toutain A, Trembath RC, Voss E, Wilson L, Hennekam R, deZegher F, Dörr HG, Reis A. Mutations in the pericentrin (PCNT) gene causeprimordial dwarfism. Science. 2008 Feb 8;319(5864):816-9. doi:10.1126/science.1151174.
Willems M, Geneviève D, Borck G, Baumann C, Baujat G, Bieth E, Edery P, Farra C, Gerard M, Héron D, Leheup B, Le Merrer M, Lyonnet S, Martin-Coignard D,Mathieu M, Thauvin-Robinet C, Verloes A, Colleaux L, Munnich A, Cormier-Daire V. Molecular analysis of pericentrin gene (PCNT) in a series of 24Seckel/microcephalic osteodysplastic primordial dwarfism type II (MOPD II)families. J Med Genet. 2010 Dec;47(12):797-802. doi: 10.1136/jmg.2009.067298.

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Subjects: Genetics & Heredity

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Lily Guo

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Entry Collection: MedlinePlus

Update Date: 25 Dec 2020

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