Is SAMHD1 p.Ser368Pro (c.1102T>C) pathogenic?

SAMHD1 p.Ser368Pro (c.1102T>C) is classified Uncertain significance in SAMHD1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-01). AlphaMissense: likely pathogenic (0.9592); Absent from gnomAD v4.1.

How common is SAMHD1 p.Ser368Pro (c.1102T>C) in the general population?

SAMHD1 p.Ser368Pro (c.1102T>C) is absent from gnomAD v4.1 (gnomAD).

What do computational predictors say about SAMHD1 p.Ser368Pro (c.1102T>C)?

AlphaMissense predicts likely pathogenic (score 0.9592) — an in-silico prediction, not a clinical call.

SAMHD1 p.Ser368Pro

c.1102T>C · VCV4755930

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.9592 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

2/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.9592	likely pathogenic · top 7% in SAMHD1
REVEL	0.447	indeterminate
SaProt	LLR -16.72	damaging
⇒ AlphaMissense and SaProt both call this damaging; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 2	GERP -2, phastCons 0.62
Regional constraint	o/e 0.85	unconstrained · MANE · 59 kb · p 1.9e-05 · regional, not allelic
Overall
CADD	20.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: SAMHD1
Protein: p.Ser368Pro
Coding: c.1102T>C
MANE Select: NM_015474
Type: single nucleotide variant
Location: chr20:36912513 (GRCh38)
Gene constraint: LOEUF 0.889 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 88.45 · 76 PDB
Residue 368: an α-helix

Full SAMHD1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

SAMHD1 c.1062+1G>T Pathogenic/Likely pathogenic ★★ same type
SAMHD1 c.1411-2A>G Pathogenic ★★ same type
SAMHD1 c.509+1G>A Likely pathogenic ★★ same type
SAMHD1 c.626-1G>C Pathogenic/Likely pathogenic ★★ same type
SAMHD1 p.Arg106Ter Pathogenic/Likely pathogenic ★★ same type
SAMHD1 p.Arg134Ter Pathogenic/Likely pathogenic ★★ same type
SAMHD1 p.Arg143Cys Pathogenic/Likely pathogenic ★★ same type
SAMHD1 p.Arg143His Pathogenic/Likely pathogenic ★★ 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/samhd1-p-ser368pro (accessed [today's date]).

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