chr7-142750621-C-T

Variant names:

• chr7-142750621-C-T
• rs769459903
• NM_002769.5:c.107C>T

Variant summary

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

The NM_002769.5(PRSS1):​c.107C>T​(p.Pro36Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,664 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. P36R) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 37)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: PRSS1 NM_002769.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.88
• Publications: 0 publications found

Genes affected

PRSS1 (HGNC:9475): (serine protease 1) This gene encodes a trypsinogen, which is a member of the trypsin family of serine proteases. This enzyme is secreted by the pancreas and cleaved to its active form in the small intestine. It is active on peptide linkages involving the carboxyl group of lysine or arginine. Mutations in this gene are associated with hereditary pancreatitis. This gene and several other trypsinogen genes are localized to the T cell receptor beta locus on chromosome 7. [provided by RefSeq, Jul 2008]

PRSS1 Gene-Disease associations (from GenCC):

• hereditary chronic pancreatitis

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, PanelApp Australia, Illumina, Labcorp Genetics (formerly Invitae), Ambry Genetics
• malignant pancreatic neoplasm

  Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp

TRB (HGNC:12155):

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 1 benign, 27 uncertain in NM_002769.5
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.993

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002769.5. 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
	PRSS1	NM_002769.5	MANE Select	c.107C>T	p.Pro36Leu	missense	Exon 2 of 5	NP_002760.1
	PRSS1	NR_172947.1		n.120C>T		non_coding_transcript_exon	Exon 2 of 5
	PRSS1	NR_172948.1		n.120C>T		non_coding_transcript_exon	Exon 2 of 5

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRSS1	ENST00000311737.12	TSL:1 MANE Select	c.107C>T	p.Pro36Leu	missense	Exon 2 of 5	ENSP00000308720.7
	PRSS1	ENST00000486171.5	TSL:5	c.107C>T	p.Pro36Leu	missense	Exon 2 of 6	ENSP00000417854.1
	PRSS1	ENST00000492062.2	TSL:2	c.107C>T	p.Pro36Leu	missense	Exon 2 of 5	ENSP00000419912.2

Frequencies

GnomAD3 genomes Cov.: 37

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461664 Hom.: 0 Cov.: 85 AF XY: 0.00000138 AC XY: 1 AN XY: 727140

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33472

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.000174 AC: 1 AN: 5762

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111836

Other (OTH) AF: 0.00 AC: 0 AN: 60378

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 37

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.69
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	26
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	D
Eigen	Pathogenic	0.79
Eigen_PC	Uncertain	0.57
FATHMM_MKL	Uncertain	0.96	D
M_CAP	Pathogenic	0.90	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	0.98	D
MutationAssessor	Pathogenic	3.8	H
PhyloP100		5.9
PrimateAI	Uncertain	0.51	T
PROVEAN	Pathogenic	-8.8	D
REVEL	Pathogenic	0.96
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.86
MutPred		0.90		Loss of disorder (P = 0.0396)
MVP		0.98
MPC		0.62
ClinPred		1.0	D
GERP RS		3.5
PromoterAI		0.011	Neutral
Varity_R		0.80
gMVP		0.89
Mutation Taster		=25/75	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: rs769459903; hg19: chr7-142458472; COSMIC: COSV100297681; COSMIC: COSV100297681;