rs17876044

Positions:

• chr5-177406361-T-C
• chr5-177406361-T-G

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BS1 BS2

The ENST00000253496.4(F12):​c.116-300A>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.021 in 152,072 control chromosomes in the GnomAD database, including 45 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 0.021 (45 hom., cov: 32)
• Consequence: F12 ENST00000253496.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.510

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]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.94).
• BS1: Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.021 (3193/152072) while in subpopulation AFR AF= 0.0278 (1155/41484). AF 95% confidence interval is 0.0265. There are 45 homozygotes in gnomad4. There are 1492 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 45 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
F12	NM_000505.4	c.116-300A>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.116-300A>G		intron_variant		1	NM_000505.4	ENSP00000253496	P1

Frequencies

GnomAD3 genomes AF: 0.0210 AC: 3191 AN: 151954 Hom.: 45 Cov.: 32

Gnomad AFR AF: 0.0279

Gnomad AMI AF: 0.124

Gnomad AMR AF: 0.0159

Gnomad ASJ AF: 0.0334

Gnomad EAS AF: 0.00213

Gnomad SAS AF: 0.00788

Gnomad FIN AF: 0.00946

Gnomad MID AF: 0.0158

Gnomad NFE AF: 0.0202

Gnomad OTH AF: 0.0197

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

GnomAD4 genome AF: 0.0210 AC: 3193 AN: 152072 Hom.: 45 Cov.: 32 AF XY: 0.0201 AC XY: 1492 AN XY: 74356

Gnomad4 AFR AF: 0.0278

Gnomad4 AMR AF: 0.0158

Gnomad4 ASJ AF: 0.0334

Gnomad4 EAS AF: 0.00213

Gnomad4 SAS AF: 0.00810

Gnomad4 FIN AF: 0.00946

Gnomad4 NFE AF: 0.0202

Gnomad4 OTH AF: 0.0195

Alfa AF: 0.0195 Hom.: 6

Bravo AF: 0.0220

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.94
CADD	Benign	2.0
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: rs17876044; hg19: chr5-176833362;