SAG

Chr 2

S-antigen visual arrestin

Also known as: RP47, RP96, S-AG

Members of arrestin/beta-arrestin protein family are thought to participate in agonist-mediated desensitization of G-protein-coupled receptors and cause specific dampening of cellular responses to stimuli such as hormones, neurotransmitters, or sensory signals. S-arrestin, also known as S-antigen, is a major soluble photoreceptor protein that is involved in desensitization of the photoactivated transduction cascade. It is expressed in the retina and the pineal gland and inhibits coupling of rhodopsin to transducin in vitro. Additionally, S-arrestin is highly antigenic, and is capable of inducing experimental autoimmune uveoretinitis. Mutations in this gene have been associated with Oguchi disease, a rare autosomal recessive form of night blindness. [provided by RefSeq, Jul 2008]

GeneReviewsResearchGenerating clinical summary…

Primary Disease Associations & Inheritance

UniProtNight blindness, congenital stationary, Oguchi type 1
UniProtRetinitis pigmentosa 47
UniProtRetinitis pigmentosa 96

Clinical highlights

Gene-disease validity (ClinGen)
retinitis pigmentosa 47 · ARDefinitivesufficient evidence for diagnostic panels
Interpreting a novel variant
Loss of function is the curated mechanism (Gene2Phenotype), though the gene is not strongly LoF-constrained in the population — weigh truncating variants against that tolerance.Curated gene-level mechanism — a prior for triage, not a per-variant call.
12
Active trials
378
Pubs (1 yr)
P/LP submissions
P/LP missense
1.44
LOEUF
LOF
Mechanism· G2P
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GeneReview available — SAG
Authoritative clinical overview · Recommended first read
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Some data sources returned errors (1)

omim: Error: OMIM fetch failed: 429

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint?
1.44LOEUF
pLI 0.000
Z-score -0.10
OE 1.02 (0.741.44)
Tolerant

Highly tolerant — LoF variants common in population

Missense Constraint?
0.68Z-score
OE missense 0.87 (0.780.98)
201 obs / 230.2 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios?
LoF OE?1.02 (0.741.44)
00.351.4
Missense OE?0.87 (0.780.98)
00.61.4
Synonymous OE?0.86
01.21.6
LoF obs/exp: 24 / 23.5Missense obs/exp: 201 / 230.2Syn Z: 1.04

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

SAG · 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

SARS CoV 2 InfectionSARS CoV 2 Vaccination

COVID-19 Transmission and Morbidity in Malawi

RECRUITING
NCT05973084Boston UniversityStarted 2023-01-17
Heart DiseasesCoronary Artery DiseaseCoronary Artery Bypass Grafting

Comparison of the Outcomes of Single vs Multiple Arterial Grafts in Women

RECRUITING
NCT04124120Phase NAWeill Medical College of Cornell UniversityStarted 2023-04-17
Single arterial graftMultiple arterial grafting
Coronary Artery DiseaseHeart Diseases

Randomization of Single vs Multiple Arterial Grafts

RECRUITING
NCT03217006Phase NAWeill Medical College of Cornell UniversityStarted 2018-01-07
Single arterial graftMultiple arterial grafting
CorsetSpinal MobilityPosture

Effects of Different Hyperextension Braces on Spinal Mobility

ENROLLING BY INVITATION
NCT07170813Phase NAMustafa Tahsin OzerStarted 2025-10-01
Spinal hyperextension brace
Opioid Use Disorder

A Study Comparing Oral Buprenorphine and Injectable Buprenorphine for the Treatment of Opioid Use Disorder

RECRUITING
NCT04375033Phase PHASE4VA Office of Research and DevelopmentStarted 2020-11-03
Sublingual buprenorphine with naloxoneInjectable subcutaneous buprenorphine
Testicular Neoplasms

Swiss Austrian German Testicular Cancer Cohort Study - SAG TCCS

RECRUITING
NCT02229916Dr. med. Christian RothermundtStarted 2013-12
Posterior Cruciate Ligament Tear

Assessment of Outcomes of Double-bundle Posterior Cruciate Ligament Reconstruction (DB-PCLR)

RECRUITING
NCT05701592Konrad Malinowski MDStarted 2022-12-20
DB-PCLR
Anemia

INTERCEPT Blood System for RBCs Study in Regions at Potential Risk for Zika Virus Transfusion-Transmitted Infections

ACTIVE NOT RECRUITING
NCT03037164Phase PHASE3Cerus CorporationStarted 2017-05-11
INTERCEPT Blood System for Red Blood CellsConventional (Control)
SepsisNeonatal MortalityAntibiotic Resistant Infection

Clean Trial - Chlorination to Reduce Enteric and Antibiotic Resistant Infections in Neonates

RECRUITING
NCT06824350Phase NAUniversity of California, BerkeleyStarted 2025-01-21
chlorination for water disinfection and surface disinfectioninfection prevention and control messaging
Hepatitis B Infection

Reducing Vertical Transmission of Hepatitis B in Africa

ACTIVE NOT RECRUITING
NCT04704024Phase PHASE3University of Alabama at BirminghamStarted 2021-09-03
Tenofovir Disoproxil FumarateLamivudine Oral Solution
Meniscus Tear Caused by a Traumatic EventFibrin Clot AugmentationMeniscal Repair

A Comparative Prospective Study of the Arthroscopic Meniscal Repair Methods

RECRUITING
NCT06176183Phase NAVilnius UniversityStarted 2021-05-26
Arthroscopic meniscus repair
Female Breast Cancer Patients

Video-immunotherapy: a New Approach in Breast Cancer Treatment

ENROLLING BY INVITATION
NCT07357207Phase NAIzmir Biomedicine and Genome CenterStarted 2023-12-01
UMAY - Video-immunotherapy gameControl - Plasebo Game