Is CD19 p.Ser56= (c.168C>T) pathogenic?

CD19 p.Ser56= (c.168C>T) is classified Likely benign in CD19 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-05-19). Absent from gnomAD v4.1.

How common is CD19 p.Ser56= (c.168C>T) in the general population?

CD19 p.Ser56= (c.168C>T) is absent from gnomAD v4.1 (gnomAD).

CD19 p.Ser56=

c.168C>T · rs746831063 · VCV3020873

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

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 0.56
Overall
CADD	4.04	PHRED · no single calibrated threshold — expert panels disagree

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: CD19
Protein: p.Ser56=
Coding: c.168C>T
MANE Select: NM_001770
dbSNP: rs746831063
Type: single nucleotide variant
Location: chr16:28932425 (GRCh38)
Gene constraint: LOEUF 0.627 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 62.99 · 4 PDB
Residue 56: a disulfide bond; the ig-like c2-type 1 domain

Full CD19 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CD19 c.835+3A>G Uncertain significance ★★ same type
CD19 p.Ala191Thr Uncertain significance ★★ ⚠ same type
CD19 p.Arg123Trp Uncertain significance ★★ ⚠ same type
CD19 p.Arg163His Uncertain significance ★★ ⚠ same type
CD19 p.Arg234Cys Uncertain significance ★★ ⚠ same type
CD19 p.Arg263His Uncertain significance ★★ ⚠ same type
CD19 p.Arg321Lys Uncertain significance ★★ ⚠ same type
CD19 p.Arg490Gln 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/cd19-p-ser56 (accessed [today's date]).

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