Is FLNB p.Ser1174= (c.3522G>A) pathogenic?

FLNB p.Ser1174= (c.3522G>A) is classified Conflicting classifications of pathogenicity in FLNB (ClinVar, Conflicting submitters, 7 submitters; last evaluated 2026-03-01). Rare (popmax 0.147%, nfe); Associated with FLNB-Related Spectrum Disorders.

What condition is associated with FLNB p.Ser1174= (c.3522G>A)?

FLNB p.Ser1174= (c.3522G>A) is associated with FLNB-Related Spectrum Disorders (ClinVar).

How common is FLNB p.Ser1174= (c.3522G>A) in the general population?

FLNB p.Ser1174= (c.3522G>A) is rare (popmax 0.147%, nfe) (gnomAD).

FLNB p.Ser1174=

c.3522G>A · rs140993979 · VCV710588

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 7 submitters

gnomAD v4.1

Rare

rare (popmax 0.147%, nfe)

Conditions

FLNB-Related Spectrum Disorders

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -20	GERP -5.4
Overall
CADD	0.015	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.147% European (non-Finnish) · 1,726/1,173,504 alleles

Filtering AF 0.141% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.139%

Overall 0.117% 1,882/1,603,538 alleles · rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.147%	680
Remaining individualsnot grpmax-eligible	0.0807%	1,239
Finnishnot grpmax-eligible	0.0724%	1,382
African / African-American	0.0362%	2,759
Admixed American	0.0339%	2,947
Middle Eastern	0.0167%	5,978
South Asian	0.0111%	9,042
Ashkenazi Jewishnot grpmax-eligible	0.00343%	29,148
East Asian	0.00224%	44,646

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: FLNB
Protein: p.Ser1174=
Coding: c.3522G>A
MANE Select: NM_001457
dbSNP: rs140993979
Type: single nucleotide variant
Location: chr3:58123488 (GRCh38)
Gene constraint: LOEUF 0.504 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 76.96 · 23 PDB
Residue 1174: a turn; the 'interaction with fblp1' region

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

Disease context

FLNB-Related Spectrum Disorders

Similar variants

FLNB p.Ser1174Leu Uncertain significance ★ ⚠ same residue
FLNB p.Glu1661Lys Uncertain significance ★★ ⚠ same condition
FLNB p.Glu78Gly Uncertain significance ★★ ⚠ same condition
FLNB p.His1117Arg Uncertain significance ★★ ⚠ same condition
FLNB p.Leu1440Pro Uncertain significance ★★ ⚠ same condition
FLNB p.Pro396Ser Uncertain significance ★★ ⚠ same condition
FLNB p.Ser1096Phe Uncertain significance ★★ ⚠ same condition
FLNB p.Ser188Cys 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/flnb-p-ser1174 (accessed [today's date]).

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