Is CBFA2T3 p.Ser377Phe (c.1130C>T) pathogenic?

CBFA2T3 p.Ser377Phe (c.1130C>T) is classified Uncertain significance in CBFA2T3 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-11-20). AlphaMissense: likely benign (0.1371); Ultra-rare (popmax 0.0216%, nfe).

How common is CBFA2T3 p.Ser377Phe (c.1130C>T) in the general population?

CBFA2T3 p.Ser377Phe (c.1130C>T) is ultra-rare (popmax 0.0216%, nfe) (gnomAD).

What do computational predictors say about CBFA2T3 p.Ser377Phe (c.1130C>T)?

AlphaMissense predicts likely benign (score 0.1371) — an in-silico prediction, not a clinical call.

CBFA2T3 p.Ser377Phe

c.1130C>T · rs781211630 · VCV2520385

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1371 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0216%, nfe)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1371	likely benign
REVEL	0.106	moderately benign-leaning
SaProt	LLR -6.67	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 7.3	GERP 1.7, phastCons 1
Regional constraint	o/e 1.12	unconstrained · MANE · 100 kb · p 0.00027 · regional, not allelic
Overall
CADD	24.8	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 0.0216% European (non-Finnish) · 251/1,162,464 alleles

Filtering AF 0.0194% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0185%

Overall 0.0161% 254/1,579,242 alleles · ultra-rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0216%	4,631
Remaining individualsnot grpmax-eligible	0.00327%	30,618
Finnishnot grpmax-eligible	0.00167%	60,050

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.Ser377Phe
Coding: c.1130C>T
MANE Select: NM_005187
dbSNP: rs781211630
Type: single nucleotide variant
Location: chr16:88882749 (GRCh38)
Gene constraint: LOEUF 0.957 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 62.26 · 1 PDB
Residue 377: the 'mediates localization to the nucleus' region; the 'mediates interaction with pde7a (in isoform 2)' region

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

Similar variants

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
CBFA2T3 p.Ala451Thr Uncertain significance ★ ⚠ same type
CBFA2T3 p.Ala460Pro 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-ser377phe (accessed [today's date]).

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