Is CBFA2T3 p.Arg638His (c.1913G>A) pathogenic?

CBFA2T3 p.Arg638His (c.1913G>A) is classified Uncertain significance in CBFA2T3 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-01-04). AlphaMissense: likely benign (0.1217); Ultra-rare (popmax 0.0423%, amr).

How common is CBFA2T3 p.Arg638His (c.1913G>A) in the general population?

CBFA2T3 p.Arg638His (c.1913G>A) is ultra-rare (popmax 0.0423%, amr) (gnomAD).

What do computational predictors say about CBFA2T3 p.Arg638His (c.1913G>A)?

AlphaMissense predicts likely benign (score 0.1217) — an in-silico prediction, not a clinical call.

CBFA2T3 p.Arg638His

c.1913G>A · rs562711336 · VCV3137951

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1217 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0423%, amr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1217	likely benign
REVEL	0.057	moderately benign-leaning
SaProt	LLR -7.41	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 1.3	GERP 0.36, phastCons 0.98
Regional constraint	o/e 1.12	unconstrained · MANE · 100 kb · p 0.00027 · regional, not allelic
Overall
CADD	21.4	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

Grpmax group 0.0423% Admixed American · 18/42,592 alleles

Filtering AF 0.0273% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0226%

Overall 0.0047% 70/1,488,094 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.0423%	2,366
Remaining individualsnot grpmax-eligible	0.0174%	5,752
East Asian	0.0151%	6,602
African / African-American	0.00992%	10,077
European (non-Finnish)	0.00249%	40,103
Finnishnot grpmax-eligible	0.00216%	46,392

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: CBFA2T3
Protein: p.Arg638His
Coding: c.1913G>A
MANE Select: NM_005187
dbSNP: rs562711336
Type: single nucleotide variant
Location: chr16:88877025 (GRCh38)
Gene constraint: LOEUF 0.957 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 62.26 · 1 PDB
Residue 638: the 'disordered' region

Full CBFA2T3 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CBFA2T3 p.Arg638Cys Uncertain significance ★ ⚠ same residue
CBFA2T3 p.Arg638Leu Uncertain significance ★ ⚠ same residue
CBFA2T3 p.Ala441Thr Likely benign ★★ same type
CBFA2T3 p.Ala534= Benign ★★ same type
CBFA2T3 p.Ala141Val Uncertain significance ★ ⚠ same type
CBFA2T3 p.Ala272Thr Uncertain significance ★ ⚠ same type
CBFA2T3 p.Ala350Thr Uncertain significance ★ ⚠ same type
CBFA2T3 p.Ala449Thr Uncertain significance ★ ⚠ 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/cbfa2t3-p-arg638his (accessed [today's date]).

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