NM_001457.4:c.3446_3455delGTGAAGCTGG

Variant names:

• chr3-58123408-GTGGGTGAAGC-G
• rs1553701033
• NM_001457.4:c.3446_3455delGTGAAGCTGG

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001457.4(FLNB):​c.3446_3455delGTGAAGCTGG​(p.Gly1149AlafsTer41) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: FLNB NM_001457.4 frameshift
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 10.0
• Publications: 0 publications found

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]

FLNB Gene-Disease associations (from GenCC):

• atelosteogenesis type I

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
• atelosteogenesis type III

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
• Larsen syndrome

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
• spondylocarpotarsal synostosis syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), G2P, Orphanet
• Boomerang dysplasia

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 3-58123408-GTGGGTGAAGC-G is Pathogenic according to our data. Variant chr3-58123408-GTGGGTGAAGC-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 559903.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001457.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FLNB	NM_001457.4	MANE Select	c.3446_3455delGTGAAGCTGG	p.Gly1149AlafsTer41	frameshift	Exon 21 of 46	NP_001448.2
	FLNB	NM_001164317.2		c.3446_3455delGTGAAGCTGG	p.Gly1149AlafsTer41	frameshift	Exon 21 of 47	NP_001157789.1
	FLNB	NM_001164318.2		c.3446_3455delGTGAAGCTGG	p.Gly1149AlafsTer41	frameshift	Exon 21 of 46	NP_001157790.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FLNB	ENST00000295956.9	TSL:1 MANE Select	c.3446_3455delGTGAAGCTGG	p.Gly1149AlafsTer41	frameshift	Exon 21 of 46	ENSP00000295956.5
	FLNB	ENST00000490882.5	TSL:1	c.3446_3455delGTGAAGCTGG	p.Gly1149AlafsTer41	frameshift	Exon 21 of 47	ENSP00000420213.1
	FLNB	ENST00000429972.6	TSL:1	c.3446_3455delGTGAAGCTGG	p.Gly1149AlafsTer41	frameshift	Exon 21 of 46	ENSP00000415599.2

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Spondylocarpotarsal synostosis syndrome Pathogenic:1

Jan 13, 2016

Equipe Genetique des Anomalies du Developpement, Université de Bourgogne

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		10
Mutation Taster		=0/200	disease causing (ClinVar)

Splicing

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

Other links and lift over

dbSNP: rs1553701033; hg19: chr3-58109135;