Is RET p.Ala26Val (c.77C>T) pathogenic?

RET p.Ala26Val (c.77C>T) is classified Uncertain significance in RET (ClinVar, Multiple submitters, 3 submitters; last evaluated 2025-11-16). AlphaMissense: likely benign (0.1464); Very rare (popmax 0.00133%, afr); Associated with hereditary neoplastic syndrome.

What condition is associated with RET p.Ala26Val (c.77C>T)?

RET p.Ala26Val (c.77C>T) is associated with hereditary neoplastic syndrome, multiple endocrine neoplasia type 2 (ClinVar).

How common is RET p.Ala26Val (c.77C>T) in the general population?

RET p.Ala26Val (c.77C>T) is very rare (popmax 0.00133%, afr) (gnomAD).

What do computational predictors say about RET p.Ala26Val (c.77C>T)?

AlphaMissense predicts likely benign (score 0.1464) — an in-silico prediction, not a clinical call.

RET p.Ala26Val

c.77C>T · rs2132656365 · VCV3016033

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

AlphaMissense

likely benign

0.1464 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00133%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary neoplastic syndrome

Computational evidence

Protein change
AlphaMissense	0.1464	likely benign
REVEL	0.144	moderately benign-leaning
SaProt	LLR -7.26	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 3.3	GERP 0.61, phastCons 0.53
Regional constraint	o/e 1.15	unconstrained · MANE · 23 kb · p 0.39 · regional, not allelic
Overall
CADD	16.57	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 0.00133% African / African-American · 1/74,914 alleles

Overall 6.84e-05% 1/1,461,434 alleles · very rare

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: RET
Protein: p.Ala26Val
Coding: c.77C>T
MANE Select: NM_020975
dbSNP: rs2132656365
Type: single nucleotide variant
Location: chr10:43100462 (GRCh38)
Gene constraint: LOEUF 0.24 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 79.27 · 34 PDB

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

Disease context

hereditary neoplastic syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: multiple endocrine neoplasia type 2

Similar variants

RET p.Ala26Ser Uncertain significance ★★ ⚠ same residue
RET p.Ala26Thr Uncertain significance ★★ ⚠ same residue
RET p.Ala26= Likely benign ★★ same residue
RET c.1759+1G>A Pathogenic/Likely pathogenic ★★ same condition
RET c.1879+1G>A Pathogenic/Likely pathogenic ★★ same condition
RET p.Arg180Ter Pathogenic ★★ same condition
RET p.Arg77Cys Pathogenic/Likely pathogenic ★★ ⚠ same condition
RET p.Arg873Trp Likely pathogenic ★★ 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/ret-p-ala26val (accessed [today's date]).

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