6-6286983-G-C

Variant names:

• chr6-6286983-G-C
• rs1993554
• NM_000129.4:c.319+18368C>G

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Moderate BA1

The NM_000129.4(F13A1):​c.319+18368C>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.131 in 152,182 control chromosomes in the GnomAD database, including 1,541 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 (1541 hom., cov: 33)
• Consequence: F13A1 NM_000129.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.102
• Publications: 0 publications found

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]

F13A1 Gene-Disease associations (from GenCC):

• factor XIII, A subunit, deficiency of

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, ClinGen
• congenital factor XIII deficiency

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000309672 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.46).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.212 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
F13A1	NM_000129.4	c.319+18368C>G		intron_variant	Intron 3 of 14	ENST00000264870.8	NP_000120.2
LOC124901253	XR_007059428.1	n.54+1043G>C		intron_variant	Intron 1 of 1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
F13A1	ENST00000264870.8	c.319+18368C>G		intron_variant	Intron 3 of 14	1	NM_000129.4	ENSP00000264870.3

Frequencies

GnomAD3 genomes AF: 0.131 AC: 19955 AN: 152064 Hom.: 1539 Cov.: 33

Gnomad AFR AF: 0.132

Gnomad AMI AF: 0.150

Gnomad AMR AF: 0.209

Gnomad ASJ AF: 0.126

Gnomad EAS AF: 0.223

Gnomad SAS AF: 0.216

Gnomad FIN AF: 0.0882

Gnomad MID AF: 0.101

Gnomad NFE AF: 0.107

Gnomad OTH AF: 0.129

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

GnomAD4 genome AF: 0.131 AC: 19971 AN: 152182 Hom.: 1541 Cov.: 33 AF XY: 0.136 AC XY: 10085 AN XY: 74382

African (AFR) AF: 0.132 AC: 5462 AN: 41520

American (AMR) AF: 0.210 AC: 3207 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.126 AC: 436 AN: 3470

East Asian (EAS) AF: 0.223 AC: 1152 AN: 5176

South Asian (SAS) AF: 0.217 AC: 1045 AN: 4814

European-Finnish (FIN) AF: 0.0882 AC: 933 AN: 10578

Middle Eastern (MID) AF: 0.0918 AC: 27 AN: 294

European-Non Finnish (NFE) AF: 0.107 AC: 7301 AN: 68010

Other (OTH) AF: 0.128 AC: 271 AN: 2114

Alfa AF: 0.102 Hom.: 564

Bravo AF: 0.141

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.46
CADD	Benign	14
DANN	Benign	0.63
PhyloP100		-0.10
Mutation Taster		=100/0	polymorphism (auto)

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: rs1993554; hg19: chr6-6287216;