4-118338294-C-A

Variant names:

• chr4-118338294-C-A
• rs145151396
• NM_003619.4:c.523G>T
• PRSS12 p.Gly175Cys

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_003619.4(PRSS12):​c.523G>T​(p.Gly175Cys) 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 1,461,688 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. G175S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PRSS12 NM_003619.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.09
• Publications: 5 publications found

Genes affected

PRSS12 (HGNC:9477): (serine protease 12) This gene encodes a member of the trypsin family of serine proteases and contains a signal peptide, a proline-rich region, a Kringle domain, four scavenger receptor cysteine-rich domains, and a trypsin-like serine protease domain. The protein, sometimes referred to as neurotrypsin or motopsin, is secreted from neuronal cells and localizes to the synaptic cleft. Studies in mice show that this protein cleaves a protein, agrin, that is important for the formation and maintenance of exitatory synapses. Defects in this gene cause a form of autosomal recessive cognitive impairment (MRT1). [provided by RefSeq, Jul 2017]

PRSS12 Gene-Disease associations (from GenCC):

• intellectual disability, autosomal recessive 1

  Inheritance: Unknown, AR Classification: DEFINITIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P
• autosomal recessive non-syndromic intellectual disability

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• non-syndromic intellectual disability

  Inheritance: AR Classification: LIMITED Submitted by: ClinGen, Illumina

ACMG classification

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003619.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRSS12	NM_003619.4	MANE Select	c.523G>T	p.Gly175Cys	missense	Exon 2 of 13	NP_003610.2	P56730
	PRSS12	NM_001440549.1		c.523G>T	p.Gly175Cys	missense	Exon 2 of 13	NP_001427478.1
	PRSS12	NM_001440550.1		c.523G>T	p.Gly175Cys	missense	Exon 2 of 9	NP_001427479.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRSS12	ENST00000296498.3	TSL:1 MANE Select	c.523G>T	p.Gly175Cys	missense	Exon 2 of 13	ENSP00000296498.3	P56730
	PRSS12	ENST00000864359.1		c.503-6428G>T		intron	N/A	ENSP00000534418.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461688 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727140

African (AFR) AF: 0.0000299 AC: 1 AN: 33458

American (AMR) AF: 0.00 AC: 0 AN: 44698

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26126

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.00 AC: 0 AN: 86252

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53408

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111906

Other (OTH) AF: 0.00 AC: 0 AN: 60382

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 1

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.39
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.040
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.37	T
Eigen	Uncertain	0.32
Eigen_PC	Benign	0.11
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.81	T
M_CAP	Uncertain	0.090	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Uncertain	0.33	D
MutationAssessor	Pathogenic	4.1	H
PhyloP100		2.1
PrimateAI	Benign	0.36	T
PROVEAN	Pathogenic	-6.0	D
REVEL	Uncertain	0.47
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Varity_R		0.78
gMVP		0.84
Mutation Taster		=66/34	polymorphism

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs145151396;

hg19: chr4-119259449;