KRT27 is part of the keratin gene family that gives hair follicles their structure and helps shape the growing hair shaft. This gene helps your body make a sturdy support protein, so if it does not work as expected, hair may be more fragile or have an unusual texture or growth pattern. Researchers mainly study the KRT27 gene in relation to hair biology and inherited hair changes. It is not a gene that has become widely known in popular culture.
What is a gene?
Genes are stretches of DNA that hold instructions your cells use to make molecules or direct processes in the body. Some carry the information needed to produce proteins, the working parts of cells. Others mainly regulate when certain processes happen, where they happen, and how strongly they run. Taken together, genes affect how the body develops and functions, and they can also shape how you respond to food, stress, or medications. To explore this subject in greater detail, you can learn more in the LearnHub.
Overview
KRT27Gene function
What if the gene works
The KRT27 gene helps make a hair protein used in the hair shaft. In hair follicles, it supports the shape, strength, and flexibility of growing hair.
Risk
What if the gene does not work
Changes in the KRT27 gene may reduce or alter keratin 27, a structural protein in hair cells. Milder variants may slightly affect filament assembly, while more severe variants can disrupt formation of stable keratin fibers.
Treatment
What does that mean for your treatment
No treatment or drug choice is currently guided specifically by pathogenic variants in the KRT27 gene.
Gene function
What if the gene works
Hair-forming cells use the KRT27 gene to build part of the sturdy protein framework needed during normal hair growth. Protein made from this gene joins other keratins to support the structure of developing hair. This background helps explain how the KRT27 gene supports hair structure in everyday life.
Protein made from the KRT27 gene becomes part of the internal framework in hair-forming cells. This framework helps developing hair stay organized as it grows.
The KRT27 protein joins with other keratin proteins to make strong support strands inside cells. These strands give growing hair more stability during brushing, washing, and normal daily wear.
As cells in the hair follicle mature, KRT27 is built into the developing hair structure. This helps support the shape and texture of normal hair fibers.
What is a variant?
A genetic variant is a slight difference in the DNA sequence within a gene. These changes are common and help shape normal human diversity, including differences in appearance, metabolism, and the way the body responds to environmental influences. Many do not have any noticeable effect and are simply part of natural genetic variation. Sometimes, however, a variant can change how a gene works more substantially and may contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the KRT27 gene can change the shape, stability, or amount of keratin 27 made in cells. In practical terms, how KRT27 gene variants affect protein function often depends on the change itself: some missense variants may slightly disrupt how keratin strands assemble with partner keratins, while more severe splice or truncating variants can greatly reduce protein production or create a shortened protein that does not join the filament network properly. These effects can range from mild to more pronounced at the cellular level.
How variants are linked to conditions
The KRT27 gene does not yet have a broadly confirmed link to a specific health condition, and current evidence on KRT27 gene variants and health conditions is still developing. If you have a confirmed variant in the KRT27 gene, your doctor or genetic counselor can explain what it may mean in the context of your personal and family history.
A variant is not necessarily a diagnosis
Genetic variants are a usual part of human biology and are common throughout the general population. Most do not have a direct effect on health and simply reflect natural human variation. For many genes, carrying a variant associated with a condition suggests a possible link rather than a definite diagnosis, especially when several genes and environmental factors also play a part. In some situations, though, one well-characterized variant in a specific gene is enough to confirm a diagnosis.
Are there things that can increase or change my risk?
There is not yet broadly confirmed evidence on specific factors that increase or reduce health risk related to the KRT27 gene. Anyone with questions about their personal or family risk can discuss them with a doctor or genetic counselor.
Inheritance of KRT27 variants
There is not yet a broadly confirmed Mendelian pattern for how KRT27 gene variants are inherited in relation to a specific human condition. As research stands, the answer to how KRT27 gene variants are inherited remains cautious rather than condition specific. The KRT27 gene is located on chromosome 17, which is an autosome, so you inherit one copy from each parent. In general, that means any KRT27 variant can be passed through either side of the family.
What does my KRT27 result mean for my family?
There isn't yet a broadly confirmed inheritance pattern tied to a specific health condition for KRT27, though this can change as research develops. If you have a KRT27 result and want to know what it could mean for your relatives, a doctor or genetic counselor can help explain it in the context of your family history.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for KRT27 variants uses a blood, saliva, or cheek swab sample to read the DNA sequence of the KRT27 gene. This shows whether a variant is present and helps clarify if it is a common change or one more likely to matter.
When should I consider getting a genetic test?
There is not yet a broadly established KRT27-specific reason for genetic testing in routine care. Decisions about testing are best made with a doctor or genetic counselor, based on your symptoms and family history.
A genetic result is only one part of your health story
Genetic results can provide valuable information, but how much they explain varies by the condition and the type of variant involved. Over time, how the body functions is also shaped by factors such as lifestyle, environment, age, and medical history. In some conditions, especially those influenced by many genes, genetic information offers context rather than certainty and is most useful when viewed alongside other parts of care. In other situations, a genetic result can give a clear answer. In areas like medication response, genetic findings may help make sense of individual experiences.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. This helps explain why the same treatment works well for one person, has less effect in another, or causes more side effects in someone else. Part of the reason is that inherited differences can change how the body breaks down, moves, or responds to a drug. These differences are common and can influence both how well a medicine works and how sensitive a person may be to it.
What is Pharmacogenetics?
Pharmacogenetics is the study of how genetic differences affect the way people respond to medications. It examines connections between genes and drugs to help explain why the same treatment may work differently from one person to another. For many medicines, genes influence how strongly a drug works or how the body handles it. This information can support more informed and more individualized treatment decisions. You can read more about this topic in the LearnHub.
Drugs influenced by the KRT27 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in how medicines work, so general health concerns or questions about side effects, new symptoms, or treatment changes are best discussed with your doctor.