What does the OCA2 gene do?

What does the OCA2 gene do?

The OCA2 gene (formerly called the P gene) provides instructions for making a protein called the P protein. This protein is located in melanocytes, which are specialized cells that produce a pigment called melanin. Melanin is the substance that gives skin, hair, and eyes their color.

What is partial albinism?

doi:10.1001/jama.1962.03050390005002. Partial albinism is a rare congenital defect of the skin, in which absence of melanin pigment in various areas is found at birth and is permanent. In contrast to total albinism, it is a genetic dominant, and never involves any organ except the skin.

How rare is Oculocutaneous albinism?

Overall, an estimated 1 in 20,000 people worldwide are born with oculocutaneous albinism. The condition affects people in many ethnic groups and geographical regions. Types 1 and 2 are the most common forms of this condition; types 3 and 4 are less common.

What is the prognosis of Oculocutaneous albinism?

Most people with albinism live a normal life span and have the same types of medical problems as the rest of the population. Although the risk to develop skin cancer is increased, with careful surveillance and prompt treatment, this is usually curable.

How is OCA2 caused?

Oculocutaneous albinism (OCA) is a group of rare inherited disorders characterized by a reduction or complete lack of melanin pigment in the skin, hair and eyes. These conditions are caused by mutations in specific genes that are necessary for the production of melanin pigment in specialized cells called melanocytes.

Can people be Halflbino?

“It is simply impossible, just like being ‘partially pregnant’ “. Conditions that are commonly termed “partial albino” include neural crest disorders such as piebaldism, Waardenburg syndrome, or other depigmentation conditions such as vitiligo.

What causes partial albinism?

Partial albinism(PBT) In the context of medical genetics, an autosomal dominant disorder is caused when a single copy of the mutant allele is present. Males and females are affected equally, and can both transmit the disorder with a risk of 50% for each child of inheriting the mutant allele.

What causes OCA2?

OCA2 is associated with mutations in the OCA2 gene (also called the P gene). The OCA2 gene is responsible for production of the OCA2 protein.

How long is the OCA2 gene?

The human OCA2 gene is quite large, consisting of 24 exons, with the translational initiation codon in exon 2, and encodes an 838 amino acid polypeptide with molecular mass of 92.8kDa (318).

How is OCA2 inherited?

This condition is caused by mutations in the OCA2 gene and is inherited in an autosomal recessive fashion.

What is oculocutaneous albinism (OCA)?

Oculocutaneous Albinism (OCA) is a group of congenital developmental disorder characterized by complete or partial loss of melanin in skin, hair and eye. OCA is caused due to defects in genes associated with melanin biosynthetic pathway.

What are the genetic mutations in albinism?

The two mutations (c.1114delG in the TYR gene and c.1426A>G in the OCA2 gene) may be responsible for partial clinical manifestations of Oculocutaneous albinism. variations in OCA2 might have developed by diversifying selection.

What is OCA2 OCA2?

OCA2 OCA2 melanosomal transmembrane protein [ (human)] Summary. This gene encodes the human homolog of the mouse p (pink-eyed dilution) gene. The encoded protein is believed to be an integral membrane protein involved in small molecule transport, specifically tyrosine, which is a precursor to melanin synthesis.

Is oculocutaneous albinism associated with first CSCC post-transplant?

Novel compound heterozygous mutations in OCA2 gene associated with non-syndromic oculocutaneous albinism in a Chinese Han patient. The results of this study is the first to show an association between OCA2 variants and time to first cSCC post-transplant.