rs1025184275

Positions:

• chr5-128349454-A-G
• chr5-128349454-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001999.4(FBN2):​c.2882T>C​(p.Val961Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,613,828 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.000013 (0 hom., cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: FBN2 NM_001999.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.25

Genes affected

FBN2 (HGNC:3604): (fibrillin 2) The protein encoded by this gene is a component of connective tissue microfibrils and may be involved in elastic fiber assembly. Mutations in this gene cause congenital contractural arachnodactyly. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FBN2	NM_001999.4	c.2882T>C	p.Val961Ala	missense_variant	23/65	ENST00000262464.9	NP_001990.2
FBN2	XM_017009228.3	c.2729T>C	p.Val910Ala	missense_variant	22/64		XP_016864717.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FBN2	ENST00000262464.9	c.2882T>C	p.Val961Ala	missense_variant	23/65	1	NM_001999.4	ENSP00000262464.4
FBN2	ENST00000508989.5	c.2783T>C	p.Val928Ala	missense_variant	22/33	2		ENSP00000425596.1

Frequencies

GnomAD3 genomes AF: 0.0000131 AC: 2 AN: 152170 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0000941

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461658 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 727118

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000116

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000131 AC: 2 AN: 152170 Hom.: 0 Cov.: 33 AF XY: 0.0000269 AC XY: 2 AN XY: 74348

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0000941

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000113

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.43
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.18
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.61	D;.;D;D
Eigen	Uncertain	0.45
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.62	T;.;.;T
M_CAP	Benign	0.079	D
MetaRNN	Uncertain	0.67	D;D;D;D
MetaSVM	Uncertain	0.59	D
MutationAssessor	Benign	0.075	N;.;N;.
PrimateAI	Uncertain	0.78	T
PROVEAN	Uncertain	-2.6	D;.;D;D
REVEL	Pathogenic	0.74
Sift	Uncertain	0.018	D;.;D;T
Sift4G	Benign	0.41	.;.;.;T
Polyphen		0.99	D;.;D;P
Vest4		0.79
MutPred		0.50		Loss of stability (P = 0.0791);.;Loss of stability (P = 0.0791);.;
MVP		0.80
MPC		0.37
ClinPred		0.91	D
GERP RS		4.2
Varity_R		0.24
gMVP		0.35

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: rs1025184275; hg19: chr5-127685146;