Medical Oncologist
CION Cancer Clinics
The BRIP1 gene: a DNA repair partner to BRCA1 | CION Cancer Clinics
BRIP1 makes a protein that helps repair broken DNA, working as a partner to BRCA1. An inherited fault in it raises the risk of ovarian cancer, usually after menopause. The link to breast cancer is not settled. This page explains what the gene does, how a fault leads to cancer, how it differs from BRCA1, and why most families do not need to test for it. At CION Cancer Clinics, our oncologists explain what a gene result means for you and your family, and plan the checks that follow.
NG
Medically reviewed by Dr. Naresh GunduConsultant Medical Oncologist · MBBS, DNB (Internal Medicine), DM (Medical Oncology, AIIMS) · last reviewed September 2026, next review due September 2027
17+specialists on panel
15,000+patients treated
35+centres across Telangana & AP
4.8★ / 800+Google rating
On this page
- What does the BRIP1 gene actually do?
- Which cancers is a BRIP1 fault linked to?
- How does a faulty BRIP1 gene lead to cancer?
- The words you will meet, in plain language
- How is BRIP1 different from BRCA1?
- What this page cannot tell you
- Four things families assume about BRIP1
- Common questions about the BRIP1 gene
The short answer
What does the BRIP1 gene actually do?
BRIP1 makes a protein that helps repair broken DNA. It works as a partner to the better-known BRCA1 gene, which is where its name comes from. When one copy of BRIP1 is faulty from birth, the main effect is a raised risk of ovarian cancer later in life.
A repair worker that unwinds DNA
DNA is a tightly wound double strand. Before a break can be mended, the strand has to be opened up so the repair tools can reach it. The BRIP1 protein does that unwinding. It hands the damaged stretch to BRCA1 and its partners, which then copy the correct sequence across from the matching strand.
Why a fault matters
If BRIP1 is not working, breaks are left unmended or are patched badly. Over many cell divisions those errors add up. In most tissues the body copes. In the ovaries and fallopian tubes, the build-up of errors is enough to raise cancer risk above that of other women.
Where people usually meet it
Most families first see the name on a multi-gene panel report, often after a relative was diagnosed with ovarian cancer. It is one of the genes that sits in the moderate-risk group, below BRCA1 and BRCA2.
A BRIP1 fault is a statement about risk. It is not a diagnosis.Organ by organ
Which cancers is a BRIP1 fault linked to?
The evidence is strong for one organ and much weaker for the others. It helps to keep the two apart.
Ovarian cancer
This is the clearest link. The risk is raised well above the general population, though it is lower than with BRCA1 or BRCA2. The cancers tend to appear after menopause rather than in young women.
Why it matters
- Ovarian cancer has no reliable screening test
- Prevention decisions are made on this risk
Breast cancer
Early studies suggested a link. Larger studies since then have not shown a clear rise in risk. Current guidelines treat the breast question as unsettled, so breast checks are planned from the family history instead.
Other cancers
Prostate and other cancers have been studied. The numbers are small and the findings do not agree. No extra screening is recommended on BRIP1 alone for these organs.
Two faulty copies
A child who inherits a faulty copy from each parent can develop a rare condition in which the bone marrow fails early in life. This is why partners who are related by blood may be offered testing before a pregnancy.
Not sure whether this applies to you?
Ask an oncologistFrom fault to cancer
How does a faulty BRIP1 gene lead to cancer?
You are born with two copies
One copy comes from each parent. One working copy is normally enough to keep DNA repair running in every cell.
A fault removes one copy from the start
A carrier has only one working copy in every cell. Nothing is wrong yet, and most carriers feel perfectly well for their whole lives.
The second copy is damaged in one cell
Ageing and ordinary copying mistakes can knock out the remaining copy in a single cell of the ovary or fallopian tube.
That cell stops mending its DNA
Without BRIP1, breaks pile up faster. Some of those breaks hit the genes that control growth, and the cell can start dividing when it should not.
Why many carriers never develop cancer
The second hit is partly chance. This is why the risk is moderate, and why two sisters with the same fault can have very different lives.
On your report
The words you will meet, in plain language
- BRIP1
- Short for BRCA1-interacting protein. You may also see it called FANCJ, an older name for the same gene.
- Helicase
- A protein that unwinds DNA so it can be read or repaired. BRIP1 is one of these.
- Germline
- Present in every cell from birth, and so it can be passed on. A fault found only inside a tumour is called somatic.
- Pathogenic variant
- A change in the gene known to stop it working. Likely pathogenic means the evidence points that way and is treated the same.
- Moderate-risk gene
- A gene whose fault raises risk clearly, but less than the high-risk genes such as BRCA1 and BRCA2.
- Carrier
- Someone who has the fault but does not have cancer. A carrier is not a patient.
Leave a number, we will call you
One field. No form to fill in, and no charge for the call.
Side by side
How is BRIP1 different from BRCA1?
BRIP1
BRCA1
Moderate raise in ovarian cancer risk
High raise in ovarian cancer risk
Breast risk not clearly shown
Breast risk clearly and strongly raised
Ovarian cancers tend to come after menopause
Ovarian cancers can come earlier
Breast checks follow the family history
Breast MRI is part of the plan from young adult life
Being straight with you
What this page cannot tell you
It cannot tell you what your own result means. The same gene name can cover a clearly harmful change or a change nobody yet understands. What your specific variant means is a question for the counsellor who ordered the test.
It cannot give you a personal number
Published risk figures for BRIP1 come from studies of mostly European families, and the studies so far are small. Your own risk also depends on your age, whether you have had children and who else in the family was affected. A counsellor can weigh those together.
Who this does not apply to
Most people do not need a BRIP1 test. If one older relative had breast cancer and nobody had ovarian cancer, a BRIP1 result is unlikely to change your care. If your oncologist found a BRIP1 change inside a tumour, that is a different question, covered on our targeted therapy pages.
If you are unsure whether your family history counts, call the helpline and describe it. You will get an honest answer.Commonly believed
Four things families assume about BRIP1
"BRIP1 is just another BRCA gene, so the plan is the same."
It works alongside BRCA1, but its risks are lower and narrower. Copying a BRCA plan can lead to scans and surgery that bring no benefit.
"I have a BRIP1 fault, so I need breast surgery."
Preventive breast surgery is not recommended on BRIP1 alone. The breast link has not been shown clearly. Breast checks are planned from the family history.
"Men cannot carry it, so my brothers are safe."
Men carry and pass on BRIP1 faults exactly as women do. A father can pass it to a daughter. Leaving men out of family testing is a common way a fault is missed.
"A scan every year will catch ovarian cancer early."
Ultrasound and blood markers have not been shown to find ovarian cancer early enough to save lives. This is why prevention is discussed with carriers instead of screening.
Questions we are asked
Common questions about the BRIP1 gene
Is BRIP1 as serious as BRCA1 or BRCA2?
No. It raises ovarian cancer risk clearly, but by less than BRCA1 or BRCA2, and it has not been shown to raise breast cancer risk in the same way. It is taken seriously. It is simply managed differently, and usually less intensively.
What is usually offered to a woman who carries BRIP1?
The main option is removal of the ovaries and fallopian tubes, usually discussed around the time of menopause rather than in young adult life. It is one option among several. Your counsellor and gynaecologist will talk through timing with you.
Can a BRIP1 fault change cancer treatment?
Sometimes. BRIP1 is one of the DNA repair genes that can make some tumours more sensitive to certain drugs, including PARP inhibitors. The evidence is thinner than for BRCA. Your oncologist decides this on the tumour itself.
Should my children be tested?
Usually not while they are children. BRIP1 risks begin in adult life, so testing normally waits until they can decide for themselves. The exception is a planned pregnancy between two carriers, which a counsellor should discuss.
We married within the family. Does that matter?
It can. If both partners carry a BRIP1 fault, a child could inherit two faulty copies and develop a rare bone marrow condition. When one partner is a known carrier, testing the other before a pregnancy is worth discussing.
My report says BRIP1 variant of uncertain significance. What now?
It means a change was found and nobody yet knows whether it matters. It should not change your care or lead to surgery. Ask how you will be told if the laboratory reclassifies it later.
Is BRIP1 included in a standard BRCA test?
Not in a test of BRCA1 and BRCA2 alone. It is included in most wider panels for breast and ovarian cancer genes. If you are unsure what your test covered, the gene list is printed on the report.
Where do I start if a relative has tested positive?
Ask for a copy of their report showing the exact variant. Take it to a genetic counsellor, who can test you for that one change. Call the CION helpline if you are not sure where to go, and someone will point you to the right clinic.
Your Specialists
Meet CION's oncologists. Bring your family history or genetic report to them.
Our medical oncologists see people with a strong family history of cancer, arrange genetic counselling and testing where it fits, and plan the checks that follow.
Medical Oncologist
Dr. C. Raghavendra Reddy
MBBS(Gold Medal), DNB(General Medicine), DM(Medical Oncology)(Gold Medal)
Medical Oncologist
Dr. Bharati Devi Gorantla
MBBS, MD(General Medicine), DM(Medical Oncology)(Adyar,Chennai), ECMO, MRCP SCE(UK)
Medical Oncologist
Dr. Owais Mohammed
MBBS, MD (General Medicine), DrNB (Medical Oncology), ECMO, MRCP SCE (Medical Oncology) (UK)
Medical Oncologist
Medical Oncologist
Want a specific doctor for your case? Mention them when booking.
Book Free ConsultationBook an appointment with our specialist
Share your name and number — we'll call you back within 30 minutes to schedule your consultation.
Sources
- MedlinePlus Genetics — BRIP1 gene
- National Cancer Institute — Genetics of Breast and Gynecologic Cancers (PDQ) - Health Professional Version
- National Cancer Institute — Genetic Testing for Inherited Cancer Susceptibility Syndromes
- Cancer Research UK — Inherited cancer genes and increased cancer risk
This page is general information, not a prescription. Do not change or stop any treatment based on what you read here. If anything is worrying you, contact your own treating team — or call our helpline and we will help you reach the right specialist.
Keep reading
Related pages
Talk to us
Has a relative's report named BRIP1?
Bring the report and tell us who in the family was diagnosed. We will tell you honestly whether testing is worth doing for you, and arrange counselling if it is. One helpline serves every CION centre.