Is AMN p.His285Leu (c.854A>T) pathogenic?

AMN p.His285Leu (c.854A>T) is classified Uncertain significance in AMN (ClinVar, Single submitter, 1 submitter; last evaluated 2024-06-22). AlphaMissense: likely benign (0.0699); Absent from gnomAD v4.1; Associated with Imerslund-Grasbeck syndrome.

What condition is associated with AMN p.His285Leu (c.854A>T)?

AMN p.His285Leu (c.854A>T) is associated with Imerslund-Grasbeck syndrome (ClinVar).

How common is AMN p.His285Leu (c.854A>T) in the general population?

AMN p.His285Leu (c.854A>T) is absent from gnomAD v4.1 (gnomAD).

How is Imerslund-Gräsbeck syndrome inherited?

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

What do computational predictors say about AMN p.His285Leu (c.854A>T)?

AlphaMissense predicts likely benign (score 0.0699) — an in-silico prediction, not a clinical call.

AMN p.His285Leu

c.854A>T · VCV3709971

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0699 · ACMG-weighted

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,559,432)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Imerslund-Grasbeck syndrome

Computational evidence

Protein change
AlphaMissense	0.0699	likely benign
REVEL	0.23	benign-leaning
SaProt	LLR -5.87	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	Δ0.29	acceptor gain · deltas
Constraint at this position
Conservation	phyloP 0.49	GERP -1.9, phastCons 0.27
Regional constraint	o/e 1.06	unconstrained · MANE · 7,988 bp · p 0.14 · regional, not allelic
Overall
CADD	20.1	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,559,432). 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: AMN
Protein: p.His285Leu
Coding: c.854A>T
MANE Select: NM_030943
Type: single nucleotide variant
Location: chr14:102929934 (GRCh38)
Gene constraint: LOEUF 1.446 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 80.78 · 1 PDB

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

Disease context

Imerslund-Grasbeck syndrome — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Imerslund-Gräsbeck syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Childhood
Prevalence: 1-9 / 1 000 000 (Finland)

Similar variants

AMN p.His285Gln Conflicting classifications of pathogenicity ★ ⚠ same residue
AMN p.His285= Likely benign ★ same residue
AMN c.208-1G>C Pathogenic/Likely pathogenic ★★ same condition
AMN c.296-1G>A Likely pathogenic ★★ same condition
AMN c.44-1G>A Likely pathogenic ★★ same condition
AMN c.760+1G>A Likely pathogenic ★★ same condition
AMN c.844-1G>C Likely pathogenic ★★ same condition
AMN p.Thr41Ile Likely 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/amn-p-his285leu (accessed [today's date]).

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