PRF1

Chr 10AR

perforin 1

Also known as: HPLH2, P1, PFP

This gene encodes a protein with structural similarities to complement component C9 that is important in immunity. This protein forms membrane pores that allow the release of granzymes and subsequent cytolysis of target cells. Whether pore formation occurs in the plasma membrane of target cells or in an endosomal membrane inside target cells is subject to debate. Mutations in this gene are associated with a variety of human disease including diabetes, multiple sclerosis, lymphomas, autoimmune lymphoproliferative syndrome (ALPS), aplastic anemia, and familial hemophagocytic lymphohistiocytosis type 2 (FHL2), a rare and lethal autosomal recessive disorder of early childhood. [provided by RefSeq, Aug 2017]

GeneReviewsOMIMResearchGenerating clinical summary…

Primary Disease Associations & Inheritance

Aplastic anemiaMIM #609135
Hemophagocytic lymphohistiocytosis, familial, 2MIM #603553
AR
Lymphoma, non-HodgkinMIM #605027

Clinical highlights

Gene-disease validity (ClinGen)
familial hemophagocytic lymphohistiocytosis 2 · ARDefinitivesufficient evidence for diagnostic panels
11
Active trials
134
Pubs (1 yr)
P/LP submissions
P/LP missense
1.19
LOEUF
Multiple*
Mechanism· predicted
📖
GeneReview available — PRF1
Authoritative clinical overview · Recommended first read
Open GeneReview ↗

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint?
1.19LOEUF
pLI 0.000
Z-score 1.05
OE 0.70 (0.431.19)
Tolerant

Highly tolerant — LoF variants common in population

Missense Constraint?
0.02Z-score
OE missense 1.00 (0.911.09)
351 obs / 351.9 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios?
LoF OE?0.70 (0.431.19)
00.351.4
Missense OE?1.00 (0.911.09)
00.61.4
Synonymous OE?1.04
01.21.6
LoF obs/exp: 10 / 14.3Missense obs/exp: 351 / 351.9Syn Z: -0.39

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

PRF1 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

EndometriosisAdenomyosis

Pain in Endometriosis And the Relation to Lifestyle

RECRUITING
NCT06332560Phase NARadboud University Medical CenterStarted 2024-10-04
Anti-inflammatory diet (DI)Cognitive behavioral therapy (CBT)
Advanced Pancreatic CancerDuctal Adenocarcinoma of Pancreas

A Phase I/IIa Study of GKL-006 Injection in Patients With Advanced Pancreatic Cancer

ACTIVE NOT RECRUITING
NCT07777211Phase PHASE1, PHASE2Beijing Gene Key Life Technology Co., LtdStarted 2025-08-14
GKL-006 injectionNab-paclitaxel and Gemcitabine
Post-Acute COVID-19 Syndrome

A Study of Apabetalone in Subjects With Long -COVID

RECRUITING
NCT06590324Phase PHASE2, PHASE3Resverlogix CorpStarted 2025-04-15
Apabetalone
Transplantation InfectionKidney Diseases

Molecular Biological and Moleculargenetic Monitoring of Therapy After Kidney Transplantation

RECRUITING
NCT01515605Odense University HospitalStarted 2011-01-01
SepsisCritical IllnessImmunosuppression

Metabolic and Functional Study of γδ T Cells in Critically Ill Patients

NOT YET RECRUITING
NCT07680816Union Hospital, Tongji Medical College, Huazhong University of Science and TechnologyStarted 2026-07-15
Diabetes MellitusPancreas TransplantationAllograft Rejection

The Norwegian Pancreas Transplantation (PTx) Study

ENROLLING BY INVITATION
NCT01957696Oslo University HospitalStarted 2013-09
Multiple MyelomaAL Amyloidosis

A Phase II Study to Evaluate the Efficacy and Safety of Teclistamab in Combination With Daratumumab (Tec-Dara) in Newly Diagnosed Multiple Myeloma With Concurrent Light Chain Amyloidosis (MM+AL).

RECRUITING
NCT07638683Phase PHASE2Shanghai Zhongshan HospitalStarted 2026-05-22
Teclistamab
Malnutrition PregnancyMalnutrition in ChildrenMalnutrition (Calorie)

Early Life Malnutrition, Environmental Enteric Dysfunction and Microbiome Trajectories

RECRUITING
NCT07195006University of ZimbabweStarted 2025-01-27
Malnutrition in pregnancy as exposurePoor WASH living conditions as exposure
Renal Cell CarcinomaAdvancedRecurrent

Neoantigen Peptide Vaccine Plus Pembrolizumab in Renal Cell Carcinoma

NOT YET RECRUITING
NCT07686744Phase PHASE1Jian LinStarted 2026-09-01
Personalized Neoantigen Polyepitope Peptide Vaccine
Early Breast CancerTriple Negative Breast Cancer

Trial for Treatment of High Risk BC With Two Sequences of Neoadjuvant Chemotherapy With Pembrolizumab

NOT YET RECRUITING
NCT06371807Phase PHASE2Fundacao ChampalimaudStarted 2024-07
Pembrolizumab injection
Myelodysplastic Syndrome

Study of an Innovative Therapy Using CAR-T Cells Targeting IL-1RAP in Patients With High-Risk Myelodysplastic Syndromes (MDS

NOT YET RECRUITING
NCT07455500Phase NAUniversity Hospital, GrenobleStarted 2026-05
Bone marrow and blood sampling