Is CTR9 p.Asn609= (c.1827C>T) pathogenic?

CTR9 p.Asn609= (c.1827C>T) is classified Benign in CTR9 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-09-09). Very rare (popmax 0.00966%, nfe).

How common is CTR9 p.Asn609= (c.1827C>T) in the general population?

CTR9 p.Asn609= (c.1827C>T) is very rare (popmax 0.00966%, nfe) (gnomAD).

CTR9 p.Asn609=

c.1827C>T · rs781382795 · VCV2170865

Benign Single submitter

Classification

Benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00966%, nfe)

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 -14	GERP -4.1
Overall
CADD	0.178	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00966% European (non-Finnish) · 114/1,179,996 alleles

Filtering AF 0.00817% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00761%

Overall 0.0129% 208/1,613,994 alleles · very rare

Ancestry group	Frequency	1 in
Finnishnot grpmax-eligible	0.111%	902
Remaining individualsnot grpmax-eligible	0.0288%	3,471
European (non-Finnish)grpmax	0.00966%	10,351
African / African-American	0.004%	24,971
South Asian	0.0022%	45,543

Finnish shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: CTR9
Protein: p.Asn609=
Coding: c.1827C>T
MANE Select: NM_014633
dbSNP: rs781382795
Type: single nucleotide variant
Location: chr11:10767946 (GRCh38)
Gene constraint: LOEUF 0.368 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 76.62 · 21 PDB
Residue 609: an α-helix

Full CTR9 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CTR9 p.Asn455Ser Likely pathogenic ★★ same type
CTR9 p.Ile17Thr Pathogenic/Likely pathogenic ★★ same type
CTR9 p.Pro25Arg Pathogenic/Likely pathogenic ★★ same type
CTR9 c.1960+3G>A Uncertain significance ★★ same type
CTR9 c.2109+4A>G Uncertain significance ★★ same type
CTR9 c.2445-3T>C Uncertain significance ★★ same type
CTR9 c.45+5G>T Uncertain significance ★★ same type
CTR9 c.593-8T>A Uncertain significance ★★ same type

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/ctr9-p-asn609 (accessed [today's date]).

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