rs80356501

Positions:

• chr3-58136111-T-C

Variant summary

Our verdict is Pathogenic. Variant got 11 ACMG points: 11P and 0B. PM1 PM2 PM5 PP2 PP3_Strong

The NM_001457.4(FLNB):​c.4804T>C​(p.Ser1602Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as not provided (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S1602Y) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: FLNB NM_001457.4 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 6.11

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 Pathogenic. Variant got 11 ACMG points.

• PM1: In a modified_residue Phosphoserine (size 0) in uniprot entity FLNB_HUMAN there are 5 pathogenic changes around while only 0 benign (100%) in NM_001457.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr3-58136112-C-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 1333671.We mark this variant Likely_pathogenic, oryginal submissions are: {Uncertain_significance=2, Likely_pathogenic=1}.
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), FLNB. . Gene score misZ 2.1406 (greater than the threshold 3.09). Trascript score misZ 4.529 (greater than threshold 3.09). GenCC has associacion of gene with spondylocarpotarsal synostosis syndrome, atelosteogenesis type I, Larsen syndrome, Boomerang dysplasia, atelosteogenesis type III.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.97

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
FLNB	NM_001457.4	c.4804T>C	p.Ser1602Pro	missense_variant	28/46	ENST00000295956.9
FLNB	NM_001164317.2	c.4897T>C	p.Ser1633Pro	missense_variant	29/47
FLNB	NM_001164318.2	c.4804T>C	p.Ser1602Pro	missense_variant	28/46
FLNB	NM_001164319.2	c.4804T>C	p.Ser1602Pro	missense_variant	28/45

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
FLNB	ENST00000295956.9	c.4804T>C	p.Ser1602Pro	missense_variant	28/46	1	NM_001457.4	A1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Atelosteogenesis type III Other:1

not provided, no classification provided

literature only

GeneReviews

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Pathogenic	26
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.91	.;D;.;.;.
Eigen	Pathogenic	0.91
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.99	D;D;D;D;D
M_CAP	Pathogenic	0.47	D
MetaRNN	Pathogenic	0.97	D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.1	.;H;H;H;.
MutationTaster	Benign	1.0	A;A;A;A;A;A;A;A
PrimateAI	Uncertain	0.60	T
PROVEAN	Pathogenic	-4.5	D;D;D;D;D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.0010	D;D;D;D;D
Sift4G	Uncertain	0.0040	D;D;D;D;D
Polyphen		0.99, 0.99	.;D;D;.;D
Vest4		0.83
MutPred		0.83		.;Gain of catalytic residue at S1602 (P = 0.0039);Gain of catalytic residue at S1602 (P = 0.0039);Gain of catalytic residue at S1602 (P = 0.0039);.;
MVP		0.98
MPC		0.77
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.96
gMVP		0.95

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: rs80356501; hg19: chr3-58121838;