rs149921907

Positions:

• chr3-58130895-T-C

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_001457.4(FLNB):​c.4377T>C​(p.Val1459=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000403 in 1,611,736 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0022 (3 hom., cov: 32)
  • Exomes 𝑓: 0.00022 (3 hom.)
• Consequence: FLNB NM_001457.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5
• Conservation: PhyloP100: -1.41

Genes affected

FLNB (HGNC:3755): (filamin B) This gene encodes a member of the filamin family. The encoded protein interacts with glycoprotein Ib alpha as part of the process to repair vascular injuries. The platelet glycoprotein Ib complex includes glycoprotein Ib alpha, and it binds the actin cytoskeleton. Mutations in this gene have been found in several conditions: atelosteogenesis type 1 and type 3; boomerang dysplasia; autosomal dominant Larsen syndrome; and spondylocarpotarsal synostosis syndrome. Multiple alternatively spliced transcript variants that encode different protein isoforms have been described for this gene. [provided by RefSeq, Nov 2009]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.81).
• BP6: Variant 3-58130895-T-C is Benign according to our data. Variant chr3-58130895-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 258113.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-1.41 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00216 (329/152318) while in subpopulation AFR AF= 0.00758 (315/41578). AF 95% confidence interval is 0.00689. There are 3 homozygotes in gnomad4. There are 162 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 3 Mitochondrial gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FLNB	NM_001457.4	c.4377T>C	p.Val1459=	synonymous_variant	25/46	ENST00000295956.9
FLNB	NM_001164317.2	c.4377T>C	p.Val1459=	synonymous_variant	25/47
FLNB	NM_001164318.2	c.4377T>C	p.Val1459=	synonymous_variant	25/46
FLNB	NM_001164319.2	c.4377T>C	p.Val1459=	synonymous_variant	25/45

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FLNB	ENST00000295956.9	c.4377T>C	p.Val1459=	synonymous_variant	25/46	1	NM_001457.4	A1

Frequencies

GnomAD3 genomes AF: 0.00216 AC: 328 AN: 152200 Hom.: 3 Cov.: 32

Gnomad AFR AF: 0.00757

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.000556 AC: 137 AN: 246214 Hom.: 1 AF XY: 0.000398 AC XY: 53 AN XY: 133316

Gnomad AFR exome AF: 0.00819

Gnomad AMR exome AF: 0.000175

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000547

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000220 AC: 321 AN: 1459418 Hom.: 3 Cov.: 31 AF XY: 0.000179 AC XY: 130 AN XY: 725766

Gnomad4 AFR exome AF: 0.00790

Gnomad4 AMR exome AF: 0.000269

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000350

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000720

Gnomad4 OTH exome AF: 0.000548

GnomAD4 genome AF: 0.00216 AC: 329 AN: 152318 Hom.: 3 Cov.: 32 AF XY: 0.00218 AC XY: 162 AN XY: 74474

Gnomad4 AFR AF: 0.00758

Gnomad4 AMR AF: 0.000653

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000414

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.00119 Hom.: 0

Bravo AF: 0.00241

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:4

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 26, 2024	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 11, 2021	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Oct 08, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2024	FLNB: BP4, BP7 -

not specified Benign:1

Benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.81
CADD	Benign	5.5
DANN	Benign	0.70

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs149921907; hg19: chr3-58116622;