NM_006486.3:c.74C>T

Variant names:

• chr22-45503059-C-T
• rs528661383
• NM_006486.3:c.74C>T

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_006486.3(FBLN1):​c.74C>T​(p.Ala25Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000616 in 1,246,944 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A25D) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0031 (1 hom., cov: 32)
  • Exomes 𝑓: 0.00027 (2 hom.)
• Consequence: FBLN1 NM_006486.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.18
• Publications: 2 publications found

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]

FBLN1 Gene-Disease associations (from GenCC):

• FBLN1-related developmental delay-central nervous system anomaly-syndactyly syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• synpolydactyly type 2

  Inheritance: Unknown, AR Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.0045414567).
• BS2: High Homozygotes in GnomAdExome4 at 2 Unknown,AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006486.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FBLN1	NM_006486.3	MANE Select	c.74C>T	p.Ala25Val	missense	Exon 1 of 17	NP_006477.3
	FBLN1	NM_001996.4		c.74C>T	p.Ala25Val	missense	Exon 1 of 15	NP_001987.3
	FBLN1	NM_006485.4		c.74C>T	p.Ala25Val	missense	Exon 1 of 15	NP_006476.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FBLN1	ENST00000327858.11	TSL:1 MANE Select	c.74C>T	p.Ala25Val	missense	Exon 1 of 17	ENSP00000331544.6	P23142-1
	FBLN1	ENST00000262722.11	TSL:1	c.74C>T	p.Ala25Val	missense	Exon 1 of 15	ENSP00000262722.7	P23142-4
	FBLN1	ENST00000442170.6	TSL:1	c.74C>T	p.Ala25Val	missense	Exon 1 of 15	ENSP00000393812.2	P23142-3

Frequencies

GnomAD3 genomes AF: 0.00312 AC: 474 AN: 151820 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.0111

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000657

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00144

GnomAD2 exomes AF: 0.000119 AC: 1 AN: 8396 AF XY: 0.00

Gnomad AFR exome AF: 0.00781

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 0.000268 AC: 294 AN: 1095018 Hom.: 2 Cov.: 30 AF XY: 0.000241 AC XY: 126 AN XY: 522636

African (AFR) AF: 0.0116 AC: 265 AN: 22760

American (AMR) AF: 0.000310 AC: 3 AN: 9678

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 14702

East Asian (EAS) AF: 0.00 AC: 0 AN: 25972

South Asian (SAS) AF: 0.00 AC: 0 AN: 25044

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 21858

Middle Eastern (MID) AF: 0.000316 AC: 1 AN: 3160

European-Non Finnish (NFE) AF: 0.00000108 AC: 1 AN: 928180

Other (OTH) AF: 0.000550 AC: 24 AN: 43664

GnomAD4 genome AF: 0.00312 AC: 474 AN: 151926 Hom.: 1 Cov.: 32 AF XY: 0.00323 AC XY: 240 AN XY: 74256

African (AFR) AF: 0.0111 AC: 460 AN: 41514

American (AMR) AF: 0.000656 AC: 10 AN: 15252

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3464

East Asian (EAS) AF: 0.00 AC: 0 AN: 5166

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10502

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 67882

Other (OTH) AF: 0.00142 AC: 3 AN: 2110

Alfa AF: 0.000418 Hom.: 0

Bravo AF: 0.00353

ExAC AF: 0.000340 AC: 4

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.30
BayesDel_addAF	Benign	-0.34	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.069	T
Eigen	Benign	-0.18
Eigen_PC	Benign	-0.20
FATHMM_MKL	Benign	0.75	D
LIST_S2	Benign	0.61	T
MetaRNN	Benign	0.0045	T
MetaSVM	Uncertain	-0.25	T
MutationAssessor	Benign	0.69	N
PhyloP100		1.2
PrimateAI	Uncertain	0.70	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.27
Sift	Benign	0.049	D
Sift4G	Benign	0.12	T
Polyphen		0.94	P
Vest4		0.24
MVP		0.76
MPC		0.38
ClinPred		0.039	T
GERP RS		1.5
PromoterAI		-0.083	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.084
gMVP		0.27
Mutation Taster		=96/4	polymorphism

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

Other links and lift over

dbSNP: rs528661383; hg19: chr22-45898939;