Is CR2 p.Pro208= (c.624C>T) pathogenic?

CR2 p.Pro208= (c.624C>T) is classified Likely benign in CR2 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-12-18). Very rare (popmax 0.00534%, afr); Associated with immunodeficiency, common variable, 7.

What condition is associated with CR2 p.Pro208= (c.624C>T)?

CR2 p.Pro208= (c.624C>T) is associated with immunodeficiency, common variable, 7 (ClinVar).

How common is CR2 p.Pro208= (c.624C>T) in the general population?

CR2 p.Pro208= (c.624C>T) is very rare (popmax 0.00534%, afr) (gnomAD).

CR2 p.Pro208=

Q: How is Common variable immunodeficiency phenotype due to CD21 deficiency inherited?

Typically Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

c.624C>T · rs61759494 · VCV1123050

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00534%, afr)

Conditions

immunodeficiency, common variable, 7

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 -0.66	GERP -3.7
Overall
CADD	1.596	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00534% African / African-American · 4/74,892 alleles

Filtering AF 0.00175% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00104%

Overall 0.000558% 9/1,613,870 alleles · very rare exomes 5/1,461,734 · genomes 4/152,136 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00534%	18,723
Admixed American	0.00167%	59,976
European (non-Finnish)	0.000339%	294,982

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: CR2
Protein: p.Pro208=
Coding: c.624C>T
MANE Select: NM_001006658
dbSNP: rs61759494
Type: single nucleotide variant
Location: chr1:207468705 (GRCh38)
Gene constraint: LOEUF 0.871 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 75.18 · 9 PDB
Residue 208: the sushi 3 domain

Full CR2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

immunodeficiency, common variable, 7 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Common variable immunodeficiency phenotype due to CD21 deficiency (Orphanet):

Inheritance: Autosomal recessive

Similar variants

CR2 p.Pro208Ala Uncertain significance ★★ same residue
CR2 p.Pro208Ser Uncertain significance ★ ⚠ same residue
CR2 p.Pro208Thr Uncertain significance ★ ⚠ same residue
CR2 p.Pro208fs Pathogenic/Likely pathogenic ★★ same residue
CR2 c.1225+1G>C Pathogenic ★★ same condition
CR2 c.3089-1G>A Likely pathogenic ★★ same condition
CR2 p.Arg142Ter Pathogenic/Likely pathogenic ★★ same condition
CR2 p.Arg368Ter Pathogenic/Likely 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/cr2-p-pro208 (accessed [today's date]).

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