Is CR2 p.Ser450Phe (c.1349C>T) pathogenic?

CR2 p.Ser450Phe (c.1349C>T) is classified Uncertain significance in CR2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-04-04). AlphaMissense: likely benign (0.106); Absent from gnomAD v4.1; Associated with Inborn genetic diseases.

What condition is associated with CR2 p.Ser450Phe (c.1349C>T)?

CR2 p.Ser450Phe (c.1349C>T) is associated with Inborn genetic diseases (ClinVar).

How common is CR2 p.Ser450Phe (c.1349C>T) in the general population?

CR2 p.Ser450Phe (c.1349C>T) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about CR2 p.Ser450Phe (c.1349C>T)?

AlphaMissense predicts likely benign (score 0.106) — an in-silico prediction, not a clinical call.

CR2 p.Ser450Phe

c.1349C>T · VCV3269368

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.106 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.106	likely benign
REVEL	0.381	indeterminate
SaProt	LLR -6.25	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL is indeterminate.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.6	GERP -0.14, phastCons 0.005
Regional constraint	o/e 0.92	unconstrained · MANE · 31 kb · p 0.0053 · regional, not allelic
Overall
CADD	19.84	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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: CR2
Protein: p.Ser450Phe
Coding: c.1349C>T
MANE Select: NM_001006658
Type: single nucleotide variant
Location: chr1:207470863 (GRCh38)
Gene constraint: LOEUF 0.871 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.18 · 9 PDB
Residue 450: the sushi 7 domain

Full CR2 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

Similar variants

CR2 p.Ala174Pro Uncertain significance ★★ ⚠ same condition
CR2 p.Ala3Ser Uncertain significance ★★ ⚠ same condition
CR2 p.Arg1063Cys Uncertain significance ★★ ⚠ same condition
CR2 p.Arg358Lys Uncertain significance ★★ ⚠ same condition
CR2 p.Arg643Cys Uncertain significance ★★ ⚠ same condition
CR2 p.Arg716Gln Uncertain significance ★★ same condition
CR2 p.Arg840Gly Uncertain significance ★★ ⚠ same condition
CR2 p.Arg987Lys Uncertain significance ★★ ⚠ 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/cr2-p-ser450phe (accessed [today's date]).

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