GENE REFERENCE / HGNC:4659

GTF2I

general transcription factor IIi

protein-coding gene7q11.23Gene information

What does this gene do?

The GTF2I gene provides instructions for making two proteins, TFII-I and BAP-135. TFII-I attaches (binds) to specific areas of DNA and helps regulate the activity of other genes. Based on this role, TFII-I is called a transcription factor. This protein is active in the brain and many other tissues in the body. Studies suggest that the TFII-I protein is involved in coordinating cell growth and division, and it may also play a role in controlling the flow of calcium into cells. Studies show it may be important in a process called myelination, which is the formation of the protective coating around nerve cells called the myelin sheath. This coating insulates nerve cells and promotes the rapid transmission of nerve impulses.

Less is known about BAP-135, the other protein produced from the GTF2I gene. The protein is active in B cells, which are a specialized type of white blood cell that protects the body against infection. When a B cell senses a foreign substance (such as a virus), it triggers a series of chemical reactions that instruct the cell to mature, divide, and produce specific proteins called antibodies to fight the infection. The BAP-135 protein is turned on as part of this series of chemical reactions.

Source: MedlinePlus, National Library of Medicine. Source publication: 2023-04-11. Source review: 2022-03.

ClinGen reviews

We found no matching ClinGen review in the data used here. This does not rule out a link between the gene and a condition.

ClinVar records

These numbers show what has been submitted to ClinVar. They cannot tell you how likely you are to have a condition.

Submitted alleles: 258
Submissions for variants in or overlapping this gene: 283
Submissions explicitly reporting this gene: 110
Alleles reported pathogenic / likely pathogenic: 90
VariationIDs with uncertain significance: 63
VariationIDs with conflicting classifications: 0

The rows count different things: alleles, submissions or VariationIDs. Their categories can overlap, so do not add them together. Pathogenic/likely pathogenic counts exclude structural variants that merely overlap a gene. A dash in the source means “not reported,” not zero.

NCBI produces the gene-summary file each week using counts recorded at the start of the month. The numbers may differ from those on the live ClinVar website. Read the field definitions ↗

View this gene in ClinVar ↗

YOUR DNA FILE

Can your DNA file tell you about GTF2I?

From a DNA test kit (such as 23andMe, AncestryDNA or MyHeritage). These kits check a fixed list of about 600,000 to 700,000 positions across your whole genome. ClinVar lists 90 alleles in GTF2I reported as pathogenic or likely pathogenic. A kit checks only some of these positions, and often none of them.

From whole genome sequencing (a VCF file). Sequencing reads most of your genome. Your file lists the places where your DNA differs from the reference genome. Some regions are hard to sequence, including parts of some genes that have near-identical copies elsewhere, and a VCF file does not record which positions were read well.

If a variant is not in your file, that does not mean you don’t have it.

What BioDecode checks

BioDecode compares every variant in your file with ClinVar, on your own computer. For each match, it shows the ClinVar classification, the review status and the condition it was reported for. Your file is not uploaded.

A ClinVar classification applies to one particular variant and the condition it was reported for. It does not tell you about other variants in GTF2I.

BioDecode cannot fill gaps in your test, diagnose a condition or replace clinical testing.

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