Is TECPR2 p.Arg273His (c.818G>A) pathogenic?

TECPR2 p.Arg273His (c.818G>A) is classified Uncertain significance in TECPR2 (ClinVar, Multiple submitters, 9 submitters; last evaluated 2024-11-01). AlphaMissense: likely benign (0.1352); Rare (popmax 0.445%, mid); Associated with Inborn genetic diseases.

What condition is associated with TECPR2 p.Arg273His (c.818G>A)?

TECPR2 p.Arg273His (c.818G>A) is associated with Inborn genetic diseases, hereditary spastic paraplegia 49, hereditary spastic paraplegia (ClinVar).

How common is TECPR2 p.Arg273His (c.818G>A) in the general population?

TECPR2 p.Arg273His (c.818G>A) is rare (popmax 0.445%, mid) (gnomAD).

What do computational predictors say about TECPR2 p.Arg273His (c.818G>A)?

AlphaMissense predicts likely benign (score 0.1352) — an in-silico prediction, not a clinical call.

TECPR2 p.Arg273His

c.818G>A · rs144069125 · VCV964805

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 9 submitters

AlphaMissense

likely benign

0.1352 · ACMG-weighted

gnomAD v4.1

Rare

rare (popmax 0.445%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.1352	likely benign
REVEL	0.191	benign-leaning
SaProt	LLR -6.23	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 12	GERP 1.6, phastCons 1
Regional constraint	o/e 0.85	unconstrained · MANE · 122 kb · p 2.1e-10 · regional, not allelic
Overall
CADD	29.0	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 0.445% Middle Eastern · 27/6,062 alleles

Filtering AF 0.314% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.27%

Overall 0.0117% 189/1,614,080 alleles · rare exomes 171/1,461,894 · genomes 18/152,186 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.445%	225
Admixed American	0.0417%	2,400
Remaining individualsnot grpmax-eligible	0.0304%	3,290
South Asian	0.0121%	8,279
European (non-Finnish)	0.00898%	11,132
African / African-American	0.00133%	74,988

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: TECPR2
Protein: p.Arg273His
Coding: c.818G>A
MANE Select: NM_014844
dbSNP: rs144069125
Type: single nucleotide variant
Location: chr14:102425158 (GRCh38)
Gene constraint: LOEUF 0.607 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 68.27

Full TECPR2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary spastic paraplegia 49 hereditary spastic paraplegia

Similar variants

TECPR2 p.Arg273Cys Uncertain significance ★ ⚠ same residue
TECPR2 c.1084+2T>C Likely pathogenic ★★ same condition
TECPR2 c.1418-2A>G Likely pathogenic ★★ same condition
TECPR2 c.2753-1G>A Likely pathogenic ★★ same condition
TECPR2 p.Gln1189Ter Pathogenic/Likely pathogenic ★★ same condition
TECPR2 p.Gln191Ter Pathogenic/Likely pathogenic ★★ same condition
TECPR2 p.Gln852Ter Pathogenic ★★ same condition
TECPR2 p.Trp1024Ter 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/tecpr2-p-arg273his (accessed [today's date]).

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