5-177402596-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM1 BP4_Moderate

The NM_000505.4(F12):c.1634G>A(p.Gly545Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000322 in 1,613,012 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another nucleotide change resulting in same amino acid change has been previously reported as Likely benignin UniProt.

• Frequency:
  • Genomes: 𝑓 0.00015 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000020 (0 hom.)
• Consequence: F12 NM_000505.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.0670

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM1: In a disulfide_bond (size 69) in uniprot entity FA12_HUMAN there are 5 pathogenic changes around while only 1 benign (83%) in NM_000505.4
• BP4: Computational evidence support a benign effect (MetaRNN=0.17690307).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
F12	NM_000505.4	c.1634G>A	p.Gly545Asp	missense_variant	13/14	ENST00000253496.4
F12	XM_011534462.3	c.1298G>A	p.Gly433Asp	missense_variant	10/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
F12	ENST00000253496.4	c.1634G>A	p.Gly545Asp	missense_variant	13/14	1	NM_000505.4	P1

Frequencies

GnomAD3 genomes AF: 0.000151 AC: 23 AN: 152226 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.000458

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000262

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000241 AC: 6 AN: 248458 Hom.: 0 AF XY: 0.0000371 AC XY: 5 AN XY: 134922

Gnomad AFR exome AF: 0.000313

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000894

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000199 AC: 29 AN: 1460668 Hom.: 0 Cov.: 31 AF XY: 0.0000151 AC XY: 11 AN XY: 726620

Gnomad4 AFR exome AF: 0.000687

Gnomad4 AMR exome AF: 0.0000895

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome AF: 0.000151 AC: 23 AN: 152344 Hom.: 0 Cov.: 33 AF XY: 0.000188 AC XY: 14 AN XY: 74498

Gnomad4 AFR AF: 0.000457

Gnomad4 AMR AF: 0.000261

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000680 Hom.: 0

Bravo AF: 0.000212

ESP6500AA AF: 0.000227 AC: 1

ESP6500EA AF: 0.00 AC: 0

ExAC AF: 0.0000412 AC: 5

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 02, 2022

The c.1634G>A (p.G545D) alteration is located in exon 13 (coding exon 13) of the F12 gene. This alteration results from a G to A substitution at nucleotide position 1634, causing the glycine (G) at amino acid position 545 to be replaced by an aspartic acid (D). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.49
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.39
Cadd	Benign	23
Dann	Uncertain	0.98
DEOGEN2	Benign	0.21	T
Eigen	Benign	-0.23
Eigen_PC	Benign	-0.21
FATHMM_MKL	Benign	0.095	N
LIST_S2	Benign	0.85	T
M_CAP	Benign	0.040	D
MetaRNN	Benign	0.18	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.27	N
MutationTaster	Benign	0.99	N
PrimateAI	Uncertain	0.50	T
PROVEAN	Benign	-1.2	N
REVEL	Benign	0.13
Sift	Benign	0.47	T
Sift4G	Benign	0.35	T
Polyphen		0.81	P
Vest4		0.38
MVP		0.71
MPC		0.53
ClinPred		0.16	T
GERP RS		3.6
Varity_R		0.56
gMVP		0.74

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs17876034; hg19: chr5-176829597;