Is MAX p.Glu148fs (c.442dup) pathogenic?

MAX p.Glu148fs (c.442dup) is classified Uncertain significance in MAX (ClinVar, Single submitter, 1 submitter; last evaluated 2018-06-06). No gnomAD frequency available for this variant; Associated with hereditary pheochromocytoma-paraganglioma.

What condition is associated with MAX p.Glu148fs (c.442dup)?

MAX p.Glu148fs (c.442dup) is associated with hereditary pheochromocytoma-paraganglioma (ClinVar).

How common is MAX p.Glu148fs (c.442dup) in the general population?

MAX p.Glu148fs (c.442dup) is no gnomAD frequency available for this variant (gnomAD).

How is Hereditary pheochromocytoma-paraganglioma inherited?

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

MAX p.Glu148fs

c.442dup · rs1566597938 · VCV570685

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

Consequence

frameshift

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

hereditary pheochromocytoma-paraganglioma

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	frameshift	predicted loss-of-function in a haploinsufficient gene (ClinGen)
NMD	escapes	premature termination codon in the last exon (5 of 5) — the truncated protein is likely expressed. PVS1 input, not an applied code
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP 7.9	GERP 1.9, phastCons 1

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: MAX
Protein: p.Glu148fs
Coding: c.442dup
MANE Select: NM_002382
dbSNP: rs1566597938
Type: Duplication
Location: chr14:65076516 (GRCh38)
Gene constraint: LOEUF 0.288 · pLI 1.00 · ClinGen HI 3/3 (gnomAD)
Structure: AlphaFold pLDDT 82.07 · 12 PDB
Residue 148: a UniProt-annotated variant site (in pcc; does not repress myc transcriptional activity); a UniProt-annotated variant site (in pcc; uncertain significance); the 'disordered' region

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

Disease context

hereditary pheochromocytoma-paraganglioma — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Hereditary pheochromocytoma-paraganglioma (Orphanet):

Inheritance: Autosomal dominant
Onset: Childhood
Prevalence: 1-9 / 1 000 000 (Worldwide)

Similar variants

MAX p.Glu148= Likely benign ★★ same residue
MAX p.Asn78fs Pathogenic/Likely pathogenic ★★ same condition
MAX c.37-15dup Benign/Likely benign ★★ same condition
MAX p.His79fs Pathogenic ★ same condition
MAX p.Lys104fs Likely pathogenic ★ same condition
MAX c.64-16dup Likely benign ★ same condition
MAX c.64-17_64-3dup Likely benign ★ same condition
MAX c.295+1G>A 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/max-p-glu148fs (accessed [today's date]).

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