NM_000505.4:c.1019-28T>A

Variant names:

• chr5-177404118-A-T
• rs17876031
• NM_000505.4:c.1019-28T>A

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BP4_Strong

The NM_000505.4(F12):​c.1019-28T>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000104 in 1,442,002 control chromosomes in the GnomAD database, with no homozygous occurrence. 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: not found (cov: 34)
  • Exomes 𝑓: 0.000010 (0 hom.)
• Consequence: F12 NM_000505.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.01
• Publications: 15 publications found

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

Our verdict: Likely_benign. The variant received -4 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000505.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	F12	NM_000505.4	MANE Select	c.1019-28T>A		intron	N/A	NP_000496.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	F12	ENST00000253496.4	TSL:1 MANE Select	c.1019-28T>A		intron	N/A	ENSP00000253496.3
	F12	ENST00000898128.1		c.1094-28T>A		intron	N/A	ENSP00000568187.1
	F12	ENST00000898127.1		c.1007-28T>A		intron	N/A	ENSP00000568186.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD2 exomes AF: 0.0000147 AC: 3 AN: 204612 AF XY: 0.0000177

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000341

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000104 AC: 15 AN: 1442002 Hom.: 0 Cov.: 81 AF XY: 0.00000977 AC XY: 7 AN XY: 716422

African (AFR) AF: 0.00 AC: 0 AN: 33264

American (AMR) AF: 0.00 AC: 0 AN: 41844

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25762

East Asian (EAS) AF: 0.00 AC: 0 AN: 39096

South Asian (SAS) AF: 0.00 AC: 0 AN: 84646

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 46984

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5714

European-Non Finnish (NFE) AF: 0.0000136 AC: 15 AN: 1105032

Other (OTH) AF: 0.00 AC: 0 AN: 59660

GnomAD4 genome Cov.: 34

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.78
CADD	Benign	9.2
DANN	Benign	0.45
PhyloP100		1.0
PromoterAI		0.12	Neutral

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: rs17876031; hg19: chr5-176831119;