Is TRAPPC11 p.Val855= (c.2565A>G) pathogenic?

TRAPPC11 p.Val855= (c.2565A>G) is classified Likely benign in TRAPPC11 (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-18). Very rare (popmax 0.00442%, sas); Associated with autosomal recessive limb-girdle muscular dystrophy type R18.

What condition is associated with TRAPPC11 p.Val855= (c.2565A>G)?

TRAPPC11 p.Val855= (c.2565A>G) is associated with autosomal recessive limb-girdle muscular dystrophy type R18 (ClinVar).

How common is TRAPPC11 p.Val855= (c.2565A>G) in the general population?

TRAPPC11 p.Val855= (c.2565A>G) is very rare (popmax 0.00442%, sas) (gnomAD).

TRAPPC11 p.Val855=

Q: How is TRAPPC11-related limb-girdle muscular dystrophy R18 inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.2565A>G · VCV4742094

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00442%, sas)

Conditions

autosomal recessive limb-girdle muscular dystrophy type R18

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.31	GERP -3.9, phastCons 0.02
Overall
CADD	1.137	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00442% South Asian · 4/90,404 alleles

Filtering AF 0.00143% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000896%

Overall 0.000868% 14/1,612,196 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00442%	22,601
Remaining individualsnot grpmax-eligible	0.0032%	31,209
European (non-Finnish)	0.000678%	147,438

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: TRAPPC11
Protein: p.Val855=
Coding: c.2565A>G
MANE Select: NM_021942
Type: single nucleotide variant
Location: chr4:183694660 (GRCh38)
Gene constraint: LOEUF 0.816 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 87.76

Full TRAPPC11 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

autosomal recessive limb-girdle muscular dystrophy type R18 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For TRAPPC11-related limb-girdle muscular dystrophy R18 (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood, Infancy

Similar variants

TRAPPC11 p.Val855Ile Uncertain significance ★ ⚠ same residue
TRAPPC11 c.1113+2T>G Likely pathogenic ★★ same condition
TRAPPC11 c.1287+5G>A Pathogenic/Likely pathogenic ★★ same condition
TRAPPC11 c.1366+1G>A Likely pathogenic ★★ same condition
TRAPPC11 c.1568-1G>T Pathogenic/Likely pathogenic ★★ same condition
TRAPPC11 p.Arg1065Ter Pathogenic ★★ same condition
TRAPPC11 p.Arg34Ter Pathogenic/Likely pathogenic ★★ same condition
TRAPPC11 p.Arg398Ter Pathogenic/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/trappc11-p-val855 (accessed [today's date]).

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