Is CD33 p.Met1Val (c.1A>G) pathogenic?

CD33 p.Met1Val (c.1A>G) is classified Uncertain significance in CD33 (ClinVar, Single submitter, 1 submitter; last evaluated 2017-09-01). Absent from gnomAD v4.1.

How common is CD33 p.Met1Val (c.1A>G) in the general population?

CD33 p.Met1Val (c.1A>G) is absent from gnomAD v4.1 (gnomAD).

CD33 p.Met1Val

c.1A>G · rs1599865323 · VCV808633

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

Consequence

start-loss

predicted LoF

gnomAD v4.1

Absent

absent from gnomAD v4.1

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	start-loss	predicted loss-of-function
REVEL	0.12	moderately benign-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 1.2	GERP -0.85, phastCons 0.002
Overall
CADD	1.762	PHRED · no single calibrated threshold — expert panels disagree

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

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: CD33
Protein: p.Met1Val
Coding: c.1A>G
MANE Select: NM_001772
dbSNP: rs1599865323
Type: single nucleotide variant
Location: chr19:51225119 (GRCh38)
Gene constraint: LOEUF 1.072 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.30 · 11 PDB

Full CD33 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CD33 p.Asp51Asn Uncertain significance ★★ ⚠ same type
CD33 c.924+295A>G Benign ★★ same type
CD33 c.924+296C>T Benign ★★ same type
CD33 c.924+2T>C Benign ★★ same type
CD33 c.924+469G>C Benign ★★ same type
CD33 c.*201G>C Benign ★★ same type
CD33 p.Ala14Val Benign ★★ same type
CD33 p.Ala65Pro Benign ★★ ⚠ same type

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/cd33-p-met1val (accessed [today's date]).

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