6-6271953-T-C

Position:

• chr6-6271953-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.320-5144A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.13 in 152,270 control chromosomes in the GnomAD database, including 1,830 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 0.13 (1830 hom., cov: 33)
• Consequence: F13A1 NM_000129.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0530

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=-0.89).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.253 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
F13A1	NM_000129.4	c.320-5144A>G		intron_variant		ENST00000264870.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
F13A1	ENST00000264870.8	c.320-5144A>G		intron_variant		1	NM_000129.4	P1
F13A1	ENST00000414279.5	c.320-5144A>G		intron_variant		4
F13A1	ENST00000431222.6	c.482-5144A>G		intron_variant		4
F13A1	ENST00000479211.1	n.305-5144A>G		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes AF: 0.130 AC: 19734 AN: 152152 Hom.: 1822 Cov.: 33

Gnomad AFR AF: 0.257

Gnomad AMI AF: 0.138

Gnomad AMR AF: 0.125

Gnomad ASJ AF: 0.0449

Gnomad EAS AF: 0.00212

Gnomad SAS AF: 0.0387

Gnomad FIN AF: 0.106

Gnomad MID AF: 0.0665

Gnomad NFE AF: 0.0785

Gnomad OTH AF: 0.109

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

GnomAD4 genome AF: 0.130 AC: 19771 AN: 152270 Hom.: 1830 Cov.: 33 AF XY: 0.129 AC XY: 9641 AN XY: 74462

Gnomad4 AFR AF: 0.257

Gnomad4 AMR AF: 0.126

Gnomad4 ASJ AF: 0.0449

Gnomad4 EAS AF: 0.00231

Gnomad4 SAS AF: 0.0396

Gnomad4 FIN AF: 0.106

Gnomad4 NFE AF: 0.0785

Gnomad4 OTH AF: 0.107

Alfa AF: 0.0921 Hom.: 541

Bravo AF: 0.136

Asia WGS AF: 0.0380 AC: 134 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	2.4
DANN	Benign	0.70

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: rs10484323; hg19: chr6-6272186;