rs17876019

Positions:

• chr5-177406451-T-C
• chr5-177406451-T-G

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_000505.4(F12):​c.116-390A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000929 in 151,778 control chromosomes in the GnomAD database, including 2 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 0.00093 (2 hom., cov: 32)
• Consequence: F12 NM_000505.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.184

Genes affected

F12 (HGNC:3530): (coagulation factor XII) This gene encodes coagulation factor XII which circulates in blood as a zymogen. This single chain zymogen is converted to a two-chain serine protease with an heavy chain (alpha-factor XIIa) and a light chain. The heavy chain contains two fibronectin-type domains, two epidermal growth factor (EGF)-like domains, a kringle domain and a proline-rich domain, whereas the light chain contains only a catalytic domain. On activation, further cleavages takes place in the heavy chain, resulting in the production of beta-factor XIIa light chain and the alpha-factor XIIa light chain becomes beta-factor XIIa heavy chain. Prekallikrein is cleaved by factor XII to form kallikrein, which then cleaves factor XII first to alpha-factor XIIa and then to beta-factor XIIa. The active factor XIIa participates in the initiation of blood coagulation, fibrinolysis, and the generation of bradykinin and angiotensin. It activates coagulation factors VII and XI. Defects in this gene do not cause any clinical symptoms and the sole effect is that whole-blood clotting time is prolonged. [provided by RefSeq, Jul 2008]

GRK6 (HGNC:4545): (G protein-coupled receptor kinase 6) This gene encodes a member of the guanine nucleotide-binding protein (G protein)-coupled receptor kinase subfamily of the Ser/Thr protein kinase family. The protein phosphorylates the activated forms of G protein-coupled receptors thus initiating their deactivation. Several transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2008]

F12 (HGNC:):

ACMG classification

Verdict is Benign. Variant got -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BS2: High Homozygotes in GnomAd4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
F12	NM_000505.4	c.116-390A>G		intron_variant		ENST00000253496.4	NP_000496.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
F12	ENST00000253496.4	c.116-390A>G		intron_variant		1	NM_000505.4	ENSP00000253496.3

Frequencies

GnomAD3 genomes AF: 0.000923 AC: 140 AN: 151664 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.0000971

Gnomad AMI AF: 0.0549

Gnomad AMR AF: 0.000722

Gnomad ASJ AF: 0.00607

Gnomad EAS AF: 0.000193

Gnomad SAS AF: 0.00146

Gnomad FIN AF: 0.00124

Gnomad MID AF: 0.00949

Gnomad NFE AF: 0.000412

Gnomad OTH AF: 0.000962

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

GnomAD4 genome AF: 0.000929 AC: 141 AN: 151778 Hom.: 2 Cov.: 32 AF XY: 0.00102 AC XY: 76 AN XY: 74150

Gnomad4 AFR AF: 0.0000968

Gnomad4 AMR AF: 0.000721

Gnomad4 ASJ AF: 0.00607

Gnomad4 EAS AF: 0.000194

Gnomad4 SAS AF: 0.00167

Gnomad4 FIN AF: 0.00124

Gnomad4 NFE AF: 0.000412

Gnomad4 OTH AF: 0.000951

Alfa AF: 0.0000540 Hom.: 0

Bravo AF: 0.00110

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	6.7
DANN	Benign	0.39

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs17876019; hg19: chr5-176833452;