chr22-45542278-G-T

Position:

• chr22-45542278-G-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_006486.3(FBLN1):​c.1190G>T​(p.Cys397Phe) variant causes a missense change involving the alteration of a conserved nucleotide. 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 Conflicting classifications of pathogenicity (no stars).

• Frequency: Genomes: not found (cov: 33)
• Consequence: FBLN1 NM_006486.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity no assertion criteria provided P:1 U:1
• Conservation: PhyloP100: 9.85

Genes affected

FBLN1 (HGNC:3600): (fibulin 1) Fibulin 1 is a secreted glycoprotein that becomes incorporated into a fibrillar extracellular matrix. Calcium-binding is apparently required to mediate its binding to laminin and nidogen. It mediates platelet adhesion via binding fibrinogen. Four splice variants which differ in the 3' end have been identified. Each variant encodes a different isoform, but no functional distinctions have been identified among the four variants. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.994

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FBLN1	NM_006486.3	c.1190G>T	p.Cys397Phe	missense_variant	10/17	ENST00000327858.11	NP_006477.3
FBLN1	NM_001996.4	c.1190G>T	p.Cys397Phe	missense_variant	10/15		NP_001987.3
FBLN1	NM_006485.4	c.1190G>T	p.Cys397Phe	missense_variant	10/15		NP_006476.3
FBLN1	NM_006487.3	c.1190G>T	p.Cys397Phe	missense_variant	10/15		NP_006478.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FBLN1	ENST00000327858.11	c.1190G>T	p.Cys397Phe	missense_variant	10/17	1	NM_006486.3	ENSP00000331544	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1 Uncertain:1

Revision: no assertion criteria provided

Submissions by phenotype

Autosomal recessive syndrome of syndactyly, undescended testes and central nervous system defects Pathogenic:1

Pathogenic, no assertion criteria provided

research

Department of Neuroscience, King Faisal Specialist Hospital

Jul 20, 2012

- -

not provided Uncertain:1

Uncertain significance, no assertion criteria provided

literature only

OMIM

May 01, 2014

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.58	D
BayesDel_noAF	Pathogenic	0.60
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.93	.;.;D;.;.
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.97
FATHMM_MKL	Pathogenic	1.0	D
LIST_S2	Uncertain	0.92	D;D;D;D;D
M_CAP	Pathogenic	0.85	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D
MetaSVM	Pathogenic	0.91	D
MutationAssessor	Pathogenic	4.0	.;H;H;H;H
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.67	T
PROVEAN	Pathogenic	-11	D;D;D;D;D
REVEL	Pathogenic	0.97
Sift	Pathogenic	0.0	D;D;D;D;D
Sift4G	Pathogenic	0.0	D;D;D;D;D
Polyphen		1.0	D;D;D;.;.
Vest4		0.99
MutPred		0.98		Loss of catalytic residue at R433 (P = 0.3165);.;.;.;.;
MVP		0.97
MPC		1.5
ClinPred		1.0	D
GERP RS		5.3
Varity_R		0.96
gMVP		0.99

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: rs397509432; hg19: chr22-45938158;