GENE REFERENCE / HGNC:19185

FRAS1

Fraser extracellular matrix complex subunit 1

protein-coding gene4q21.21Gene information

What does this gene do?

The FRAS1 gene provides instructions for making a protein that is part of a group of proteins called the FRAS/FREM complex. This complex is found in basement membranes, which are thin, sheet-like structures that separate and support cells in many tissues. The FRAS/FREM complex is particularly important during development before birth. One of its roles is to anchor the top layer of skin by connecting the basement membrane of the top layer to the layer of skin below. The FRAS/FREM complex is also involved in the proper development of certain other organs and tissues, including the kidneys, although the mechanism is unclear.

Source: MedlinePlus, National Library of Medicine. Source publication: 2025-09-26. Source review: 2014-06.

ClinGen reviews

ClinGen reviews the evidence linking a particular gene to a condition. Each rating below describes the strength of that link. It does not classify a variant in your DNA file.

Condition	Inheritance	Evidence
Fraser syndromeMONDO:0009046 · Evaluated 2022-10-11	Autosomal recessive	DefinitiveCongenital Anomalies of the Kidney and Urinary Tract Gene Curation Expert Panel

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: 3,707
Submissions for variants in or overlapping this gene: 5,850
Submissions explicitly reporting this gene: 5,768
Alleles reported pathogenic / likely pathogenic: 348
VariationIDs with uncertain significance: 1,325
VariationIDs with conflicting classifications: 194

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 FRAS1?

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 348 alleles in FRAS1 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 FRAS1.

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

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