4-118331751-G-T

Variant names:

• chr4-118331751-G-T
• NM_003619.4:c.936C>A
• PRSS12 p.Ala312Ala

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_003619.4(PRSS12):​c.936C>A​(p.Ala312Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A312A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PRSS12 NM_003619.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -4.92
• Publications: 0 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_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP7: Synonymous conserved (PhyloP=-4.92 with no splicing effect.

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.936C>A	p.Ala312Ala	synonymous	Exon 4 of 13	NP_003610.2	P56730
	PRSS12	NM_001440549.1		c.936C>A	p.Ala312Ala	synonymous	Exon 4 of 13	NP_001427478.1
	PRSS12	NM_001440550.1		c.936C>A	p.Ala312Ala	synonymous	Exon 4 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.936C>A	p.Ala312Ala	synonymous	Exon 4 of 13	ENSP00000296498.3	P56730
	PRSS12	ENST00000864359.1		c.618C>A	p.Ala206Ala	synonymous	Exon 2 of 11	ENSP00000534418.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	0.015
DANN	Benign	0.37
PhyloP100		-4.9

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

hg19: chr4-119252906; COSMIC: COSV99628972;