Is COL4A3 p.Arg1609fs (c.4825del) pathogenic?

COL4A3 p.Arg1609fs (c.4825del) is classified Pathogenic/Likely pathogenic in COL4A3 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-06-17). No gnomAD frequency available for this variant; Associated with autosomal dominant Alport syndrome.

What condition is associated with COL4A3 p.Arg1609fs (c.4825del)?

COL4A3 p.Arg1609fs (c.4825del) is associated with autosomal dominant Alport syndrome, Alport syndrome 3b, autosomal recessive, hematuria, benign familial, 2 (ClinVar).

How common is COL4A3 p.Arg1609fs (c.4825del) in the general population?

COL4A3 p.Arg1609fs (c.4825del) is no gnomAD frequency available for this variant (gnomAD).

How is Alport syndrome inherited?

Typically Autosomal dominant, Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

COL4A3 p.Arg1609fs

c.4825del · rs2073715263 · VCV1451415

Pathogenic/Likely pathogenic Multiple submitters

Classification

Pathogenic/Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

Consequence

frameshift

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

autosomal dominant Alport syndrome

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	frameshift	predicted loss-of-function; NMD-escape possible for C-terminal truncations
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP 7.9	GERP 2.8, phastCons 1

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: COL4A3
Protein: p.Arg1609fs
Coding: c.4825del
dbSNP: rs2073715263
Type: Deletion
Location: chr2:227310844 (GRCh38)

Full COL4A3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

autosomal dominant Alport syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Alport syndrome 3b, autosomal recessive hematuria, benign familial, 2

For Alport syndrome (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, X-linked dominant
Onset: Adolescent, Adult, Childhood, Elderly

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/col4a3-p-arg1609fs (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown