Is FLT4 p.Pro341Leu (c.1022C>T) pathogenic?

FLT4 p.Pro341Leu (c.1022C>T) is classified Uncertain significance in FLT4 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-01-09). AlphaMissense: likely benign (0.2488); Very rare (popmax 0.00133%, afr); Associated with Inborn genetic diseases.

What condition is associated with FLT4 p.Pro341Leu (c.1022C>T)?

FLT4 p.Pro341Leu (c.1022C>T) is associated with Inborn genetic diseases (ClinVar).

How common is FLT4 p.Pro341Leu (c.1022C>T) in the general population?

FLT4 p.Pro341Leu (c.1022C>T) is very rare (popmax 0.00133%, afr) (gnomAD).

What do computational predictors say about FLT4 p.Pro341Leu (c.1022C>T)?

AlphaMissense predicts likely benign (score 0.2488) — an in-silico prediction, not a clinical call.

FLT4 p.Pro341Leu

c.1022C>T · rs1244634915 · VCV3095742

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2488 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00133%, afr)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.2488	likely benign
REVEL	0.478	indeterminate
SaProt	LLR -9.29	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.3, phastCons 1
Regional constraint	o/e 0.86	unconstrained · MANE · 15 kb · p 1.4e-05 · regional, not allelic
Overall
CADD	24.0	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

Grpmax group 0.00133% African / African-American · 1/74,928 alleles

Overall 0.000124% 2/1,612,594 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00133%	74,928
South Asian	0.0011%	91,084

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: FLT4
Protein: p.Pro341Leu
Coding: c.1022C>T
MANE Select: NM_182925
dbSNP: rs1244634915
Type: single nucleotide variant
Location: chr5:180628963 (GRCh38)
Gene constraint: LOEUF 0.265 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 72.82 · 2 PDB
Residue 341: a β-strand; a UniProt-annotated variant site (in chtd7); the ig-like c2-type 4 domain

Full FLT4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

FLT4 p.Pro341Ala Uncertain significance ★ ⚠ same residue
FLT4 p.Gly1131Ser Pathogenic/Likely pathogenic ★★ same condition
FLT4 p.Ala702Ser Uncertain significance ★★ ⚠ same condition
FLT4 p.Arg1189His Uncertain significance ★★ ⚠ same condition
FLT4 p.Glu207Lys Uncertain significance ★★ ⚠ same condition
FLT4 p.Glu365Lys Uncertain significance ★★ ⚠ same condition
FLT4 p.Gly4Ala Uncertain significance ★★ ⚠ same condition
FLT4 p.Met1260Leu Uncertain significance ★★ ⚠ 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/flt4-p-pro341leu (accessed [today's date]).

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