rs281875176

Variant names:

• chr11-57614418-T-C
• rs281875176
• NM_000062.3:c.1340T>C

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Strong

The ENST00000278407.9(SERPING1):​c.1340T>C​(p.Leu447Pro) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as not provided (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: SERPING1 ENST00000278407.9 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 4.88
• Publications: 4 publications found

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]

SERPING1 Gene-Disease associations (from GenCC):

• hereditary angioedema with C1Inh deficiency

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae)
• C1 inhibitor deficiency

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary angioedema type 1

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hereditary angioedema type 2

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 5 uncertain in ENST00000278407.9
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.982

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000278407.9. 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
	SERPING1	NM_000062.3	MANE Select	c.1340T>C	p.Leu447Pro	missense	Exon 8 of 8	NP_000053.2
	SERPING1	NM_001032295.2		c.1340T>C	p.Leu447Pro	missense	Exon 7 of 7	NP_001027466.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SERPING1	ENST00000278407.9	TSL:1 MANE Select	c.1340T>C	p.Leu447Pro	missense	Exon 8 of 8	ENSP00000278407.4
	SERPING1	ENST00000619430.2	TSL:1	c.1136T>C	p.Leu379Pro	missense	Exon 7 of 7	ENSP00000478572.2
	SERPING1	ENST00000531133.5	TSL:1	n.*709T>C		non_coding_transcript_exon	Exon 6 of 6	ENSP00000435431.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: not provided

Revision: no classification provided

Pathogenic	VUS	Benign	Condition
-	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.47	D
BayesDel_noAF	Pathogenic	0.44
CADD	Pathogenic	27
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.91	D
Eigen	Pathogenic	0.72
Eigen_PC	Uncertain	0.63
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.65	T
M_CAP	Pathogenic	0.66	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.97	D
MutationAssessor	Pathogenic	3.3	M
PhyloP100		4.9
PrimateAI	Uncertain	0.55	T
PROVEAN	Pathogenic	-6.0	D
REVEL	Pathogenic	0.94
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0020	D
Polyphen		1.0	D
Vest4		0.93
MutPred		0.83		Gain of disorder (P = 0.007)
MVP		0.99
MPC		1.3
ClinPred		1.0	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		1.0
gMVP		1.0
Mutation Taster		=0/100	disease causing

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: rs281875176; hg19: chr11-57381891;