rs41309138

Positions:

• chr5-177406880-G-A
• chr5-177406880-G-T

Variant summary

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

The NM_000505.4(F12):​c.116-819C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0124 in 152,332 control chromosomes in the GnomAD database, including 18 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 0.012 (18 hom., cov: 32)
• Consequence: F12 NM_000505.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.757

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=-0.91).
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0124 (1895/152332) while in subpopulation NFE AF= 0.017 (1155/68036). AF 95% confidence interval is 0.0162. There are 18 homozygotes in gnomad4. There are 911 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAd4 at 18 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
F12	NM_000505.4	c.116-819C>T		intron_variant		ENST00000253496.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
F12	ENST00000253496.4	c.116-819C>T		intron_variant		1	NM_000505.4	P1

Frequencies

GnomAD3 genomes AF: 0.0124 AC: 1895 AN: 152214 Hom.: 18 Cov.: 32

Gnomad AFR AF: 0.00548

Gnomad AMI AF: 0.00110

Gnomad AMR AF: 0.0109

Gnomad ASJ AF: 0.0213

Gnomad EAS AF: 0.00115

Gnomad SAS AF: 0.00600

Gnomad FIN AF: 0.0161

Gnomad MID AF: 0.0728

Gnomad NFE AF: 0.0170

Gnomad OTH AF: 0.0206

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

GnomAD4 genome AF: 0.0124 AC: 1895 AN: 152332 Hom.: 18 Cov.: 32 AF XY: 0.0122 AC XY: 911 AN XY: 74482

Gnomad4 AFR AF: 0.00546

Gnomad4 AMR AF: 0.0109

Gnomad4 ASJ AF: 0.0213

Gnomad4 EAS AF: 0.000963

Gnomad4 SAS AF: 0.00601

Gnomad4 FIN AF: 0.0161

Gnomad4 NFE AF: 0.0170

Gnomad4 OTH AF: 0.0203

Alfa AF: 0.00399 Hom.: 0

Bravo AF: 0.0123

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	7.2
DANN	Benign	0.57

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: rs41309138; hg19: chr5-176833881;