Is EVC p.Arg622Ter (c.1864C>T) pathogenic?

EVC p.Arg622Ter (c.1864C>T) is classified Pathogenic in EVC (ClinVar, Single submitter, 2 submitters; last evaluated 2023-03-16). Very rare (popmax 0.00244%, eas); Associated with acrofacial dysostosis, Weyers type.

What condition is associated with EVC p.Arg622Ter (c.1864C>T)?

EVC p.Arg622Ter (c.1864C>T) is associated with acrofacial dysostosis, Weyers type, Ellis-van Creveld syndrome (ClinVar).

How common is EVC p.Arg622Ter (c.1864C>T) in the general population?

EVC p.Arg622Ter (c.1864C>T) is very rare (popmax 0.00244%, eas) (gnomAD).

EVC p.Arg622Ter

c.1864C>T · rs1329006994 · VCV933487

Pathogenic Single submitter

Classification

Pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 2 submitters

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Rare

very rare (popmax 0.00244%, eas)

Conditions

acrofacial dysostosis, Weyers type

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function
NMD	predicted	premature termination codon in exon 13 of 21
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 1.3	GERP -1.4, phastCons 0.03
Overall
CADD	38.0	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

Grpmax group 0.00244% East Asian · 1/41,022 alleles

Filtering AF 0.000128% ClinGen BA1/BS1 input FAF95, joint · FAF99 9.3e-05%

Overall 0.000451% 7/1,550,682 alleles · very rare exomes 6/1,398,530 · genomes 1/152,152 · joint denominator

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00244%	41,022
South Asian	0.00119%	84,030
European (non-Finnish)	0.000436%	229,478

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: EVC
Protein: p.Arg622Ter
Coding: c.1864C>T
MANE Select: NM_153717
dbSNP: rs1329006994
Type: single nucleotide variant
Location: chr4:5793695 (GRCh38)
Gene constraint: LOEUF 1.134 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 74.49

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

Disease context

acrofacial dysostosis, Weyers type — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: Ellis-van Creveld syndrome

Similar variants

EVC p.Arg622Gln Uncertain significance ★★ ⚠ same residue
EVC c.1098+1G>A Pathogenic/Likely pathogenic ★★ same condition
EVC c.175-2A>G Pathogenic/Likely pathogenic ★★ same condition
EVC c.1777-1G>A Pathogenic/Likely pathogenic ★★ same condition
EVC c.1777-2A>G Pathogenic/Likely pathogenic ★★ same condition
EVC c.1886+1G>C Likely pathogenic ★★ same condition
EVC c.1886+5G>A Pathogenic ★★ same condition
EVC c.1886+5G>T 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/evc-p-arg622ter (accessed [today's date]).

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