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Reviewed September 2013

What is the official name of the B3GLCT gene?

The official name of this gene is “beta 3-glucosyltransferase.”

B3GLCT is the gene's official symbol. The B3GLCT 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 B3GLCT gene?

The B3GLCT gene (formerly known as B3GALTL) provides instructions for making an enzyme called beta 3-glucosyltransferase (B3Glc-T), which is involved in the complex process of adding sugar molecules to proteins (glycosylation). Glycosylation modifies proteins so they can perform a wider variety of functions. The B3Glc-T enzyme is involved in a two-step glycosylation pathway that results in the formation of a sugar structure, made up of the sugars fucose and glucose, on a specific location of several different proteins. The B3Glc-T enzyme is responsible for the second step, which adds a glucose molecule to the fucose molecule already attached to the protein. The B3GLCT gene is normally turned on (active) in most cells of the body, which suggests that the B3Glc-T enzyme plays an important role across many cell types.

Does the B3GLCT gene share characteristics with other genes?

The B3GLCT gene belongs to a family of genes called B3GT (beta 3-glycosyltransferases).

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 B3GLCT gene related to health conditions?

Peters plus syndrome - caused by mutations in the B3GLCT gene

At least 10 mutations that cause Peters plus syndrome have been identified in the B3GLCT gene. Peters plus syndrome is characterized by eye abnormalities, short stature, intellectual disability, and distinctive facial features. The most common B3GLCT gene mutation replaces the DNA building block (nucleotide) guanine with the nucleotide adenine near an area of the gene called exon 8 (written as 660+1G>A). This mutation disrupts how genetic information is pieced together to produce the B3Glc-T enzyme. The resulting enzyme is abnormally short and nonfunctional. It is unclear how the loss of functional B3Glc-T enzyme leads to the signs and symptoms of Peters plus syndrome, but impaired glycosylation likely disrupts the function of many proteins, which may contribute to the variety of features.

Where is the B3GLCT gene located?

Cytogenetic Location: 13q12.3

Molecular Location on chromosome 13: base pairs 31,199,975 to 31,332,276

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

The B3GLCT gene is located on the long (q) arm of chromosome 13 at position 12.3.

The B3GLCT gene is located on the long (q) arm of chromosome 13 at position 12.3.

More precisely, the B3GLCT gene is located from base pair 31,199,975 to base pair 31,332,276 on chromosome 13.

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

Where can I find additional information about B3GLCT?

You and your healthcare professional may find the following resources about B3GLCT 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 B3GLCT gene or gene products?

  • B3Glc-T
  • B3GTL
  • beta 1,3-galactosyltransferase-like
  • beta3Glc-T
  • beta-3-glycosyltransferase-like

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 B3GLCT?

adenine ; cell ; congenital ; disability ; DNA ; enzyme ; exon ; fucose ; gene ; glucose ; glycosylation ; guanine ; molecule ; mutation ; nucleotide ; protein ; short stature ; stature ; syndrome

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

See also Understanding Medical Terminology.

References (7 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: September 2013
Published: February 1, 2016