Is TAP2 p.Pro147= (c.441G>A) pathogenic?

TAP2 p.Pro147= (c.441G>A) is classified Likely benign in TAP2 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-06-29). Very rare (popmax 0.0011%, sas); Associated with MHC class I deficiency.

What condition is associated with TAP2 p.Pro147= (c.441G>A)?

TAP2 p.Pro147= (c.441G>A) is associated with MHC class I deficiency (ClinVar).

How common is TAP2 p.Pro147= (c.441G>A) in the general population?

TAP2 p.Pro147= (c.441G>A) is very rare (popmax 0.0011%, sas) (gnomAD).

TAP2 p.Pro147=

Q: How is Immunodeficiency by defective expression of MHC class I inherited?

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

c.441G>A · rs755997151 · VCV2807520

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Conditions

MHC class I deficiency

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 -4.7	GERP -3.5
Overall
CADD	1.948	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% South Asian · 1/91,080 alleles

Filtering AF 2.8e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 1.1e-05%

Overall 0.000205% 3/1,461,856 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0011%	91,080
European (non-Finnish)	0.000169%	590,012

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: TAP2
Protein: p.Pro147=
Coding: c.441G>A
MANE Select: NM_001290043
dbSNP: rs755997151
Type: single nucleotide variant
Location: chr6:32837793 (GRCh38)
Structure: AlphaFold pLDDT 96.96 · 1 PDB
Residue 147: the cral-trio domain

Full TAP2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

MHC class I deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Immunodeficiency by defective expression of MHC class I (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood

Similar variants

TAP2 c.1636-1G>A Pathogenic/Likely pathogenic ★★ same condition
TAP2 c.1932+1G>A Uncertain significance ★★ same condition
TAP2 p.Ala17Val Uncertain significance ★★ ⚠ same condition
TAP2 p.Ala306Val Uncertain significance ★★ ⚠ same condition
TAP2 p.Ala500Thr Uncertain significance ★★ ⚠ same condition
TAP2 p.Ala500Val Uncertain significance ★★ ⚠ same condition
TAP2 p.Arg273Gln Uncertain significance ★★ ⚠ same condition
TAP2 p.Arg313Cys 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/tap2-p-pro147 (accessed [today's date]).

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