Is CLMN p.Ser368Cys (c.1103C>G) pathogenic?

CLMN p.Ser368Cys (c.1103C>G) is classified Uncertain significance in CLMN (ClinVar, Single submitter, 1 submitter; last evaluated 2024-10-29). AlphaMissense: likely benign (0.0849); Very rare (popmax 0.00466%, nfe).

How common is CLMN p.Ser368Cys (c.1103C>G) in the general population?

CLMN p.Ser368Cys (c.1103C>G) is very rare (popmax 0.00466%, nfe) (gnomAD).

What do computational predictors say about CLMN p.Ser368Cys (c.1103C>G)?

AlphaMissense predicts likely benign (score 0.0849) — an in-silico prediction, not a clinical call.

CLMN p.Ser368Cys

c.1103C>G · rs757003520 · VCV2258543

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0849 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00466%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.0849	likely benign
REVEL	0.338	indeterminate
SaProt	LLR -8.71	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 3.5	GERP 1.3, phastCons 0.63
Regional constraint	o/e 0.94	unconstrained · MANE · 128 kb · p 0.024 · regional, not allelic
Overall
CADD	20.6	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 0.00466% European (non-Finnish) · 55/1,180,026 alleles

Filtering AF 0.00367% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00329%

Overall 0.00359% 58/1,613,998 alleles · very rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.00466%	21,455
African / African-American	0.00267%	37,441
South Asian	0.0011%	91,082

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: CLMN
Protein: p.Ser368Cys
Coding: c.1103C>G
MANE Select: NM_024734
dbSNP: rs757003520
Type: single nucleotide variant
Location: chr14:95204246 (GRCh38)
Gene constraint: LOEUF 0.755 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 52.84

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

Similar variants

CLMN c.2511+10C>T Benign ★★ same type
CLMN c.886-4G>T Likely benign ★★ same type
CLMN p.Asp592= Benign ★★ same type
CLMN p.Glu276Lys Likely benign ★★ same type
CLMN p.Glu357Lys Benign ★★ same type
CLMN p.Glu771Ala Likely benign ★★ same type
CLMN p.His518= Benign ★★ same type
CLMN p.Ile900Phe Benign ★★ 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/clmn-p-ser368cys (accessed [today's date]).

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