The KLK7 gene helps control how the outer layer of your skin sheds and renews itself by making a protein that loosens old connections between skin cells. In medicine, this gene is important because it helps regulate normal skin turnover and supports the skin barrier. If it is too active or not active enough, the skin may become dry, scaly, irritated, or more prone to inflammation.
What is a gene?
Genes are stretches of DNA that provide cells with instructions to make molecules or regulate processes in the body. Some genes hold the information needed to produce proteins, the parts of cells that do the work. Other genes mainly control when certain processes happen, where they happen, and how strongly they operate. As a whole, genes affect how the body develops and functions, and they can also shape how you respond to food, stress, or medications. To explore this topic more deeply, you can learn more in the LearnHub.
Overview
KLK7Gene function
What if the gene works
The KLK7 gene helps skin shed old surface cells by breaking down proteins that hold them together. This supports the skin barrier and normal skin renewal.
Risk
What if the gene does not work
Milder to more severe variants in the KLK7 gene can reduce or alter the skin enzyme that helps shed old surface cells. This may disrupt protein breakdown between skin cells and weaken normal skin barrier turnover.
Treatment
What does that mean for your treatment
No KLK7-specific treatment or management approach is currently established in clinical guidelines. The KLK7 gene is being studied as a possible drug target and biomarker, especially in skin conditions and some cancers, but this has not yet changed routine treatment choices.
Gene function
What if the gene works
In the outer layer of your skin, the KLK7 gene helps old cells separate and shed in a controlled way. The KLK7 gene plays a role in how your skin sheds old cells and renews its surface. This steady turnover helps keep the skin surface refreshed and supports normal barrier upkeep.
The KLK7 gene makes an enzyme, a protein that cuts other proteins, in the outer skin layer. This controlled cutting helps skin structures remodel at the right time.
Its protein loosens the links between older skin cells near the surface. This lets worn out cells shed in a steady way as newer cells move up.
By supporting regular surface turnover, the KLK7 gene helps maintain the outer skin layer. That ongoing renewal contributes to a skin barrier that holds in moisture and screens out everyday irritants.
What is a variant?
A genetic variant is a minor difference in the DNA sequence within a gene. These differences are common and help shape normal human diversity, including variation in appearance, metabolism, and the way the body responds to environmental influences. Many variants do not have any noticeable effect and are simply part of natural genetic variation. In some situations, though, a variant changes how a gene works more substantially and can contribute to or cause a genetic condition.
Genetic variants
What if the gene does not work
Variants in the KLK7 gene can alter how much KLK7 protein is made, how well it folds, or how strongly its enzyme activity works at the skin cell surface. In practical terms, this is how KLK7 gene variants affect protein function: milder changes may partly reduce activity, while more severe variants can sharply lower activity or stop the protein from being released normally. Some variants may also shift the protein toward excess activity, changing how it interacts with nearby skin proteins.
How variants are linked to conditions
Research on KLK7 gene variants and health conditions is still developing, and the KLK7 gene does not yet have a broadly confirmed link to a specific condition. If you have a reported KLK7 variant or a diagnosis involving the KLK7 gene, your doctor or genetic counselor can explain what that result means for you.
A variant is not necessarily a diagnosis
Genetic variants are a routine part of human biology and are widespread in the general population. Most do not have a direct effect on health and simply contribute to natural human diversity. 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 play a role. In some situations, though, a single well-characterized variant in a specific gene can be 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 KLK7 gene itself. Personal risk usually depends on the exact gene change, family history, and other health and environmental factors, so concerns are best discussed with a doctor or genetic counselor.
Inheritance of KLK7 variants
There is not yet a broadly confirmed disease specific KLK7 gene inheritance pattern used in routine human genetics, even though KLK7 has been studied in skin conditions and related traits. Current evidence does not support a single, well-established Mendelian answer for how KLK7 gene variants are inherited in the way it does for genes tied to clear dominant, recessive, or X-linked conditions. The KLK7 gene is located on chromosome 19, which is an autosome, so each person inherits one copy from each parent.
What does my KLK7 result mean for my family?
There is not yet a broadly confirmed family inheritance pattern for KLK7 tied to one specific, well-established genetic condition. Some KLK7 changes have been studied in skin conditions, but a KLK7 result alone usually does not give a clear, predictable meaning for relatives. If you have a specific KLK7 finding, family implications depend on the exact change and why the testing was done.
Genetic information
Genetic testing
How you find out about variants
Genetic testing for KLK7 variants reads the DNA in a blood, saliva, or cheek swab sample. A lab checks the KLK7 gene for changes by comparing your sequence with a reference sequence. Results may show a benign variant, a variant linked to health effects, or a variant of uncertain significance.
When should I consider getting a genetic test?
There is not yet a broadly established, KLK7-specific reason for genetic testing in routine care. Testing decisions are usually based on your symptoms, skin findings, and family history, together with a doctor or genetic counselor.
A genetic result is only one part of your health story
A genetic result can be informative, but how much it reveals depends on the condition and the kind of variant involved. Many factors, including lifestyle, environment, age, and medical history, influence how the body functions over time. In some conditions, especially those shaped by many genes, genetic information offers context rather than certainty and is best considered together with other parts of care. In other situations, a genetic result may give a clear answer. In areas like medication response, genetic results can also help put individual experiences in context.
Pharmacogenetics
How variants shape your response to medicine
Genetic variation can affect how people respond to medicines. Small differences in DNA can change how the body breaks down a drug, moves it through the bloodstream, or responds at the tissue level. This helps explain why the same treatment works well for one person, works less well for another, or causes more side effects in someone else. These differences are common and are one reason medication response can vary from person to person.
What is Pharmacogenetics?
Pharmacogenetics examines how genetic differences can influence the way a person responds to medications. It looks at relationships between genes and drugs to better explain why the same treatment may work differently from one person to another. For many medicines, genes affect both how strongly a drug works and how the body processes it. This information can help support more informed and individualized treatment decisions. To explore this subject in greater detail, you can learn more in the LearnHub.
Drugs influenced by the KLK7 gene
When should I seek medical advice?
There is not yet a broadly confirmed role for this gene in guiding medication choices, so if you have health concerns, new symptoms, or side effects from treatment, it makes sense to speak with your doctor or pharmacist.
History
KLK7 entered the scientific literature through skin research in the 1990s, when researchers identified an enzyme in the outer layer of skin and called it stratum corneum chymotryptic enzyme, or SCCE. As medical science evolved, so did understanding of this gene. Scientists later showed that SCCE belonged to the kallikrein family, a group of closely related genes clustered on chromosome 19, and it was renamed the KLK7 gene. That reclassification helped connect earlier skin findings with a broader body of work on kallikrein genes in human tissues. From these first observations, research expanded steadily, especially in dermatology and cancer biology, where KLK7 became part of larger studies on how kallikrein genes are regulated and measured.