rs2066874

Positions:

• chr4-154608429-T-C

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BS1 BS2

The NM_021870.3(FGG):​c.851+37A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00164 in 1,599,256 control chromosomes in the GnomAD database, including 34 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0088 (22 hom., cov: 32)
  • Exomes 𝑓: 0.00089 (12 hom.)
• Consequence: FGG NM_021870.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.427

Genes affected

FGG (HGNC:3694): (fibrinogen gamma chain) The protein encoded by this gene is the gamma component of fibrinogen, a blood-borne glycoprotein comprised of three pairs of nonidentical polypeptide chains. Following vascular injury, fibrinogen is cleaved by thrombin to form fibrin which is the most abundant component of blood clots. In addition, various cleavage products of fibrinogen and fibrin regulate cell adhesion and spreading, display vasoconstrictor and chemotactic activities, and are mitogens for several cell types. Mutations in this gene lead to several disorders, including dysfibrinogenemia, hypofibrinogenemia and thrombophilia. Alternative splicing results in transcript variants encoding different isoforms. [provided by RefSeq, Aug 2015]

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00878 (1337/152302) while in subpopulation AFR AF= 0.0308 (1282/41570). AF 95% confidence interval is 0.0294. There are 22 homozygotes in gnomad4. There are 617 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 22 SD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FGG	NM_021870.3	c.851+37A>G		intron_variant		ENST00000336098.8	NP_068656.2
FGG	NM_000509.6	c.851+37A>G		intron_variant			NP_000500.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FGG	ENST00000336098.8	c.851+37A>G		intron_variant		2	NM_021870.3	ENSP00000336829

Frequencies

GnomAD3 genomes AF: 0.00880 AC: 1339 AN: 152184 Hom.: 22 Cov.: 32

Gnomad AFR AF: 0.0310

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00249

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.0000941

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00478

GnomAD3 exomes AF: 0.00245 AC: 581 AN: 237308 Hom.: 10 AF XY: 0.00176 AC XY: 226 AN XY: 128248

Gnomad AFR exome AF: 0.0330

Gnomad AMR exome AF: 0.00180

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000754

Gnomad OTH exome AF: 0.000683

GnomAD4 exome AF: 0.000886 AC: 1282 AN: 1446954 Hom.: 12 Cov.: 30 AF XY: 0.000784 AC XY: 564 AN XY: 719476

Gnomad4 AFR exome AF: 0.0314

Gnomad4 AMR exome AF: 0.00185

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000470

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.0000263

Gnomad4 OTH exome AF: 0.00194

GnomAD4 genome AF: 0.00878 AC: 1337 AN: 152302 Hom.: 22 Cov.: 32 AF XY: 0.00828 AC XY: 617 AN XY: 74474

Gnomad4 AFR AF: 0.0308

Gnomad4 AMR AF: 0.00248

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000415

Gnomad4 FIN AF: 0.0000941

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00473

Alfa AF: 0.00764 Hom.: 3

Bravo AF: 0.0103

Asia WGS AF: 0.000866 AC: 3 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Uncertain	24
DANN	Benign	0.58

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.82		Details are displayed if max score is > 0.2
DS_AG_spliceai		0.82		Position offset: -1

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

Publications

LitVar

Other links and lift over

dbSNP: rs2066874; hg19: chr4-155529581;