Is INTU p.Ser577Ter (c.1730C>G) pathogenic?

INTU p.Ser577Ter (c.1730C>G) is classified Uncertain significance in INTU (ClinVar, Single submitter, 1 submitter; last evaluated 2024-05-29). Very rare (popmax 0.0011%, sas).

How common is INTU p.Ser577Ter (c.1730C>G) in the general population?

INTU p.Ser577Ter (c.1730C>G) is very rare (popmax 0.0011%, sas) (gnomAD).

INTU p.Ser577Ter

c.1730C>G · VCV3681384

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

Consequence

nonsense (stop-gain)

predicted LoF

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	nonsense (stop-gain)	predicted loss-of-function
NMD	predicted	premature termination codon in exon 11 of 16
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>T here scores Δ0.25 · evaluated, not missing
Constraint at this position
Conservation	phyloP 5.9	GERP 1.7, phastCons 0.95
Overall
CADD	36.0	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% South Asian · 1/91,084 alleles

Overall 6.2e-05% 1/1,614,080 alleles · very rare exomes 1/1,461,762 · genomes 0/152,318 · joint denominator

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: INTU
Protein: p.Ser577Ter
Coding: c.1730C>G
MANE Select: NM_015693
Type: single nucleotide variant
Location: chr4:127705754 (GRCh38)
Gene constraint: LOEUF 1.012 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 67.35 · 4 PDB
Residue 577: a UniProt-annotated variant site (in srtd7/20; in an srtd7/20 patient who also carries variant wdr35 l-311); a UniProt-annotated variant site (in srtd20; loss of subcellular location to cilium basal body, when tested in a heterologous system)

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

Similar variants

INTU p.Ala611Thr Uncertain significance ★★ ⚠ same type
INTU p.Ala804Val Uncertain significance ★★ ⚠ same type
INTU p.Arg119Thr Uncertain significance ★★ ⚠ same type
INTU p.Arg127Cys Uncertain significance ★★ ⚠ same type
INTU p.Arg510Gln Uncertain significance ★★ ⚠ same type
INTU p.Arg510Trp Uncertain significance ★★ ⚠ same type
INTU p.Arg665Cys Uncertain significance ★★ ⚠ same type
INTU p.Arg705Cys 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/intu-p-ser577ter (accessed [today's date]).

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