Is CD101 p.Ser887Pro (c.2659T>C) pathogenic?

CD101 p.Ser887Pro (c.2659T>C) is classified Uncertain significance in CD101 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-05-17). AlphaMissense: likely benign (0.0905); Ultra-rare (popmax 0.0535%, eas).

How common is CD101 p.Ser887Pro (c.2659T>C) in the general population?

CD101 p.Ser887Pro (c.2659T>C) is ultra-rare (popmax 0.0535%, eas) (gnomAD).

What do computational predictors say about CD101 p.Ser887Pro (c.2659T>C)?

AlphaMissense predicts likely benign (score 0.0905) — an in-silico prediction, not a clinical call.

CD101 p.Ser887Pro

c.2659T>C · rs201768380 · VCV2570151

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0905 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0535%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0905	likely benign
REVEL	0.16	moderately benign-leaning
SaProt	LLR -6.80	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 -2.9	GERP -3.2
Regional constraint	o/e 0.94	unconstrained · MANE · 32 kb · p 0.034 · regional, not allelic
Overall
CADD	1.824	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 0.0535% East Asian · 24/44,876 alleles

Filtering AF 0.0368% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0313%

Overall 0.00161% 26/1,614,174 alleles · ultra-rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.0535%	1,870
Remaining individualsnot grpmax-eligible	0.0016%	62,508
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: CD101
Protein: p.Ser887Pro
Coding: c.2659T>C
MANE Select: NM_001256106
dbSNP: rs201768380
Type: single nucleotide variant
Location: chr1:117025739 (GRCh38)
Gene constraint: LOEUF 0.889 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.76
Residue 887: the ig-like c2-type 7 domain; a disulfide bond

Full CD101 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CD101 p.Ser887Leu Uncertain significance ★ ⚠ same residue
CD101 p.Arg622His Benign ★★ same type
CD101 p.Arg933Gln Benign ★★ ⚠ same type
CD101 p.Asn225Ser Benign ★★ same type
CD101 p.Leu362Pro Benign ★★ same type
CD101 p.Ser525Arg Benign ★★ ⚠ same type
CD101 p.Ser985= Benign ★★ same type
CD101 p.Tyr651Asp 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/cd101-p-ser887pro (accessed [today's date]).

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