Is ENG p.Arg554Cys (c.1660C>T) pathogenic?

ENG p.Arg554Cys (c.1660C>T) is classified Likely benign in ENG (ClinVar, Single submitter, 1 submitter; last evaluated 2023-08-14). AlphaMissense: likely benign (0.1627); Ultra-rare (popmax 0.0493%, mid); Associated with hereditary hemorrhagic telangiectasia.

What condition is associated with ENG p.Arg554Cys (c.1660C>T)?

ENG p.Arg554Cys (c.1660C>T) is associated with hereditary hemorrhagic telangiectasia (ClinVar).

How common is ENG p.Arg554Cys (c.1660C>T) in the general population?

ENG p.Arg554Cys (c.1660C>T) is ultra-rare (popmax 0.0493%, mid) (gnomAD).

How is Hereditary hemorrhagic telangiectasia inherited?

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

What do computational predictors say about ENG p.Arg554Cys (c.1660C>T)?

AlphaMissense predicts likely benign (score 0.1627) — an in-silico prediction, not a clinical call.

ENG p.Arg554Cys

c.1660C>T · rs1162510965 · VCV2752047

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1627 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0493%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

hereditary hemorrhagic telangiectasia

Computational evidence

Protein change
AlphaMissense	0.1627	likely benign
REVEL	0.221	benign-leaning
SaProt	LLR -7.37	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.52	GERP -1.9, phastCons 0.038
Regional constraint	o/e 0.86	unconstrained · MANE · 39 kb · p 5.2e-05 · regional, not allelic
Overall
CADD	22.6	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0493% Middle Eastern · 3/6,084 alleles

Filtering AF 0.0134% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00715%

Overall 0.000929% 15/1,614,104 alleles · ultra-rare exomes 14/1,461,834 · genomes 1/152,270 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0493%	2,028
Admixed American	0.00333%	30,006
East Asian	0.00223%	44,898
South Asian	0.0011%	91,092
European (non-Finnish)	0.000678%	147,507

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: ENG
Protein: p.Arg554Cys
Coding: c.1660C>T
MANE Select: NM_001114753
dbSNP: rs1162510965
Type: single nucleotide variant
Location: chr9:127818146 (GRCh38)
Gene constraint: LOEUF 0.374 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 80.84 · 3 PDB
Residue 554: a β-strand

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

Disease context

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

For Hereditary hemorrhagic telangiectasia (Orphanet):

Inheritance: Autosomal dominant
Onset: All ages
Prevalence: 1-5 / 10 000 (Europe)

Similar variants

ENG p.Arg554His Likely benign ★ same residue
ENG p.Arg554= Likely benign ★ same residue
ENG p.Arg529His Pathogenic ★★★ same condition
ENG p.Asn423Ser Likely pathogenic ★★★ ⚠ same condition
ENG p.Cys382Tyr Pathogenic ★★★ same condition
ENG p.Cys549Gly Likely pathogenic ★★★ same condition
ENG p.Gly331Ser Pathogenic ★★★ ⚠ same condition
ENG p.Gly603Arg 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/eng-p-arg554cys (accessed [today's date]).

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