rs121909054

chr3-167825264-G-Achr3-167825264-G-C

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PS1 PM2 PM5 PP3_Strong PP5_Moderate

The NM_001122752.2(SERPINI1):c.1174G>A(p.Gly392Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★). Another nucleotide change resulting in same amino acid change has been previously reported as Pathogenicin ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G392E) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SERPINI1 NM_001122752.2 missense
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 7.67

Genes affected

SERPINI1 (HGNC:8943): (serpin family I member 1) This gene encodes a member of the serpin superfamily of serine proteinase inhibitors. The protein is primarily secreted by axons in the brain, and preferentially reacts with and inhibits tissue-type plasminogen activator. It is thought to play a role in the regulation of axonal growth and the development of synaptic plasticity. Mutations in this gene result in familial encephalopathy with neuroserpin inclusion bodies (FENIB), which is a dominantly inherited form of familial encephalopathy and epilepsy characterized by the accumulation of mutant neuroserpin polymers. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PS1: Transcript NM_001122752.2 (SERPINI1) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar as 1686176
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr3-167825265-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 7089.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.994
• PP5: Variant 3-167825264-G-A is Pathogenic according to our data. Variant chr3-167825264-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 7090.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SERPINI1	NM_001122752.2	c.1174G>A	p.Gly392Arg	missense_variant	9/9	ENST00000446050.7
SERPINI1	NM_005025.5	c.1174G>A	p.Gly392Arg	missense_variant	9/9
SERPINI1	XM_017006618.3	c.1174G>A	p.Gly392Arg	missense_variant	9/9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SERPINI1	ENST00000446050.7	c.1174G>A	p.Gly392Arg	missense_variant	9/9	1	NM_001122752.2	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Familial encephalopathy with neuroserpin inclusion bodies Pathogenic:2

Pathogenic, no assertion criteria provided	literature only	OMIM	Jul 01, 2008	- -
Pathogenic, criteria provided, single submitter	clinical testing	Center of Genomic medicine, Geneva, University Hospital of Geneva	Jun 29, 2016	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.55	D
BayesDel_noAF	Pathogenic	0.56
Cadd	Pathogenic	32
Dann	Pathogenic	1.0
DEOGEN2	Pathogenic	0.82	D;D
Eigen	Pathogenic	1.1
Eigen_PC	Pathogenic	0.99
FATHMM_MKL	Pathogenic	0.98	D
M_CAP	Pathogenic	0.63	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.3	H;H
MutationTaster	Benign	1.0	A;A;A
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-7.4	D;D
REVEL	Pathogenic	0.98
Sift	Uncertain	0.0010	D;D
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;D
Vest4		0.99
MutPred		0.96		Gain of MoRF binding (P = 0.0283);Gain of MoRF binding (P = 0.0283);
MVP		0.95
MPC		0.53
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.99
gMVP		0.95

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs121909054; hg19: chr3-167543052;