6-6172447-T-C

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000129.4(F13A1):c.1747+2133A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.655 in 150,182 control chromosomes in the GnomAD database, including 33,188 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 0.65 (33188 hom., cov: 28)
• Consequence: F13A1 NM_000129.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.882

Genes affected

F13A1 (HGNC:3531): (coagulation factor XIII A chain) This gene encodes the coagulation factor XIII A subunit. Coagulation factor XIII is the last zymogen to become activated in the blood coagulation cascade. Plasma factor XIII is a heterotetramer composed of 2 A subunits and 2 B subunits. The A subunits have catalytic function, and the B subunits do not have enzymatic activity and may serve as plasma carrier molecules. Platelet factor XIII is comprised only of 2 A subunits, which are identical to those of plasma origin. Upon cleavage of the activation peptide by thrombin and in the presence of calcium ion, the plasma factor XIII dissociates its B subunits and yields the same active enzyme, factor XIIIa, as platelet factor XIII. This enzyme acts as a transglutaminase to catalyze the formation of gamma-glutamyl-epsilon-lysine crosslinking between fibrin molecules, thus stabilizing the fibrin clot. It also crosslinks alpha-2-plasmin inhibitor, or fibronectin, to the alpha chains of fibrin. Factor XIII deficiency is classified into two categories: type I deficiency, characterized by the lack of both the A and B subunits; and type II deficiency, characterized by the lack of the A subunit alone. These defects can result in a lifelong bleeding tendency, defective wound healing, and habitual abortion. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.809 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
F13A1	NM_000129.4	c.1747+2133A>G		intron_variant		ENST00000264870.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
F13A1	ENST00000264870.8	c.1747+2133A>G		intron_variant		1	NM_000129.4	P1

Frequencies

GnomAD3 genomes AF: 0.655 AC: 98234 AN: 150080 Hom.: 33141 Cov.: 28

Gnomad AFR AF: 0.816

Gnomad AMI AF: 0.586

Gnomad AMR AF: 0.511

Gnomad ASJ AF: 0.659

Gnomad EAS AF: 0.600

Gnomad SAS AF: 0.707

Gnomad FIN AF: 0.666

Gnomad MID AF: 0.777

Gnomad NFE AF: 0.588

Gnomad OTH AF: 0.665

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.655 AC: 98324 AN: 150182 Hom.: 33188 Cov.: 28 AF XY: 0.658 AC XY: 48152 AN XY: 73224

Gnomad4 AFR AF: 0.816

Gnomad4 AMR AF: 0.510

Gnomad4 ASJ AF: 0.659

Gnomad4 EAS AF: 0.601

Gnomad4 SAS AF: 0.709

Gnomad4 FIN AF: 0.666

Gnomad4 NFE AF: 0.588

Gnomad4 OTH AF: 0.665

Alfa AF: 0.591 Hom.: 41181

Bravo AF: 0.646

Asia WGS AF: 0.664 AC: 2268 AN: 3414

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
Cadd	Benign	1.1
Dann	Benign	0.49

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: rs387528; hg19: chr6-6172680;