11-57611885-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM1 PM2 PM5 PP3_Moderate

The NM_000062.3(SERPING1):c.1198C>G(p.Arg400Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R400H) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SERPING1 NM_000062.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.701

Genes affected

SERPING1 (HGNC:1228): (serpin family G member 1) This gene encodes a highly glycosylated plasma protein involved in the regulation of the complement cascade. Its encoded protein, C1 inhibitor, inhibits activated C1r and C1s of the first complement component and thus regulates complement activation. It is synthesized in the liver, and its deficiency is associated with hereditary angioneurotic oedema (HANE). Alternative splicing results in multiple transcript variants encoding the same isoform. [provided by RefSeq, May 2020]

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM1: In a hotspot region, there are 4 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_000062.3
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr11-57611885-C-T is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.851

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SERPING1	NM_000062.3	c.1198C>G	p.Arg400Gly	missense_variant	7/8	ENST00000278407.9
SERPING1	NM_001032295.2	c.1198C>G	p.Arg400Gly	missense_variant	6/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SERPING1	ENST00000278407.9	c.1198C>G	p.Arg400Gly	missense_variant	7/8	1	NM_000062.3	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461880 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 727240

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
Cadd	Benign	21
Dann	Uncertain	0.99
DEOGEN2	Pathogenic	0.91	D;.;.;.;D
Eigen	Benign	0.026
Eigen_PC	Benign	-0.22
FATHMM_MKL	Benign	0.13	N
LIST_S2	Benign	0.74	T;T;T;T;T
M_CAP	Uncertain	0.27	D
MetaRNN	Pathogenic	0.85	D;D;D;D;D
MetaSVM	Uncertain	0.0077	D
MutationAssessor	Pathogenic	3.2	M;.;.;.;.
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.32	T
PROVEAN	Pathogenic	-4.8	D;D;D;D;D
REVEL	Uncertain	0.51
Sift	Uncertain	0.0090	D;D;D;D;D
Sift4G	Uncertain	0.010	D;D;D;D;D
Polyphen		1.0	D;.;.;.;.
Vest4		0.53
MutPred		0.69		.;.;Loss of stability (P = 0.1308);.;.;
MVP		0.93
MPC		1.1
ClinPred		0.94	D
GERP RS		1.2
Varity_R		0.89
gMVP		0.91

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: rs201363394; hg19: chr11-57379358;