Is COL4A4 p.Pro883Ala (c.2647C>G) pathogenic?

COL4A4 p.Pro883Ala (c.2647C>G) is classified Uncertain significance in COL4A4 (ClinVar, Single submitter, 1 submitter; last evaluated 2021-10-29). AlphaMissense: likely benign (0.068); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with COL4A4 p.Pro883Ala (c.2647C>G)?

COL4A4 p.Pro883Ala (c.2647C>G) is associated with Inborn genetic diseases (ClinVar).

How common is COL4A4 p.Pro883Ala (c.2647C>G) in the general population?

COL4A4 p.Pro883Ala (c.2647C>G) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about COL4A4 p.Pro883Ala (c.2647C>G)?

AlphaMissense predicts likely benign (score 0.068) — an in-silico prediction, not a clinical call.

COL4A4 p.Pro883Ala

c.2647C>G · rs200761108 · VCV2388301

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.068 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.068	likely benign
REVEL	0.282	benign-leaning
SaProt	LLR -7.33	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2	GERP 0.21, phastCons 0.015
Regional constraint	o/e 0.91	unconstrained · MANE · 140 kb · p 1.4e-05 · regional, not allelic
Overall
CADD	5.117	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: COL4A4
Protein: p.Pro883Ala
Coding: c.2647C>G
MANE Select: NM_000092
dbSNP: rs200761108
Type: single nucleotide variant
Location: chr2:227056014 (GRCh38)
Gene constraint: LOEUF 0.607 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 49.03 · 2 PDB
Residue 883: the 'triple-helical region' region; the 'disordered' region

Full COL4A4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

COL4A4 p.Pro883Thr Conflicting classifications of pathogenicity ★ ⚠ same residue
COL4A4 p.Pro883Leu Uncertain significance ★ ⚠ same residue
COL4A4 p.Pro883Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
COL4A4 p.Pro883= Likely benign ★ same residue
COL4A4 p.Arg349Ter Pathogenic/Likely pathogenic ★★ same condition
COL4A4 p.Cys1588Ser Likely pathogenic ★★ same condition
COL4A4 c.4522+6G>A Uncertain significance ★★ same condition
COL4A4 p.Ala1546Thr Uncertain significance ★★ ⚠ same condition

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/col4a4-p-pro883ala (accessed [today's date]).

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