Is TMPO p.Asn186Asp (c.556A>G) pathogenic?

TMPO p.Asn186Asp (c.556A>G) is classified Uncertain significance in TMPO (ClinVar, Single submitter, 1 submitter; last evaluated 2024-10-08). AlphaMissense: ambiguous (0.4666); Very rare (popmax 0.000339%, nfe).

How common is TMPO p.Asn186Asp (c.556A>G) in the general population?

TMPO p.Asn186Asp (c.556A>G) is very rare (popmax 0.000339%, nfe) (gnomAD).

What do computational predictors say about TMPO p.Asn186Asp (c.556A>G)?

AlphaMissense predicts ambiguous (score 0.4666) — an in-silico prediction, not a clinical call.

TMPO p.Asn186Asp

c.556A>G · VCV3777503

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

ambiguous

0.4666 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000339%, nfe)

Missense predictors

0/2 damaging

REVEL, SaProt · AlphaMissense indeterminate

Computational evidence

Protein change
AlphaMissense	0.4666	ambiguous
REVEL	0.144	moderately benign-leaning
SaProt	LLR -4.41	tolerated
⇒ REVEL and SaProt both call this tolerated; AlphaMissense is indeterminate.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 9.2	GERP 1.5, phastCons 1
Regional constraint	o/e 1.01	unconstrained · MANE · 28 kb · p 0.89 · regional, not allelic
Overall
CADD	24.2	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.000339% European (non-Finnish) · 4/1,178,700 alleles

Filtering AF 7.9e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 5.4e-05%

Overall 0.000248% 4/1,611,098 alleles · very rare exomes 4/1,458,766 · genomes 0/152,332 · 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: TMPO
Protein: p.Asn186Asp
Coding: c.556A>G
MANE Select: NM_001032283
Type: single nucleotide variant
Location: chr12:98531829 (GRCh38)
Gene constraint: LOEUF 0.736 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 60.49 · 14 PDB
Residue 186: the 'disordered' region; the 'nakap95-binding n' region; the 'nucleoplasmic' region

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

Similar variants

TMPO p.Asn186Ser Conflicting classifications of pathogenicity ★ ⚠ same residue
TMPO c.565+1005A>G Uncertain significance ★★ ⚠ same type
TMPO c.565+1009T>C Uncertain significance ★★ ⚠ same type
TMPO c.565+1012A>C Uncertain significance ★★ ⚠ same type
TMPO c.565+1017A>G Uncertain significance ★★ ⚠ same type
TMPO c.565+1026A>G Uncertain significance ★★ ⚠ same type
TMPO c.565+1029G>T Uncertain significance ★★ ⚠ same type
TMPO c.565+1048G>C 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/tmpo-p-asn186asp (accessed [today's date]).

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