dbSNP rs1057520052: GUCY2C:p.Arg773Leu (chr12-14625847-C-A) – ACMG Classification: Uncertain_significance (5 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1PM2PP3

The NM_004963.4(GUCY2C):c.2318G>T(p.Arg773Leu) 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 1,461,474 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. R773Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

GUCY2C
NM_004963.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.40

Publications

0 publications found

Variant links:

Genes affected

GUCY2C (HGNC:4688): (guanylate cyclase 2C) This gene encodes a transmembrane protein that functions as a receptor for endogenous peptides guanylin and uroguanylin, and the heat-stable E. coli enterotoxin. The encoded protein activates the cystic fibrosis transmembrane conductance regulator. Mutations in this gene are associated with familial diarrhea (autosomal dominant) and meconium ileus (autosomal recessive). [provided by RefSeq, Nov 2016]

GUCY2C Gene-Disease associations (from GenCC):

congenital diarrhea 6
Inheritance: AD, AR Classification: DEFINITIVE, STRONG, SUPPORTIVE, LIMITED Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae), PanelApp Australia, Laboratory for Molecular Medicine
intestinal obstruction in the newborn due to guanylate cyclase 2C deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), G2P
congenital sodium diarrhea
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

GUCY2C links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

PM1

In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 3 uncertain in NM_004963.4

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.802

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GUCY2C	NM_004963.4 link	c.2318G>T	p.Arg773Leu	missense_variant	Exon 21 of 27	ENST00000261170.5	NP_004954.2	P25092
GUCY2C	XM_011520631.3 link	c.2072G>T	p.Arg691Leu	missense_variant	Exon 21 of 27		XP_011518933.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GUCY2C	ENST00000261170.5 link	c.2318G>T	p.Arg773Leu	missense_variant	Exon 21 of 27	1	NM_004963.4	ENSP00000261170.3		P25092

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461474

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727078

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33470

American (AMR)

AF:

0.00

AC:

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39694

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1111656

Other (OTH)

AF:

0.00

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.67

BayesDel_addAF

Uncertain

0.029

BayesDel_noAF

Benign

-0.20

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.62

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.61

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.90

M_CAP

Uncertain

0.098

MetaRNN

Pathogenic

0.80

MetaSVM

Benign

-0.62

MutationAssessor

Uncertain

2.2

PhyloP100

3.4

PrimateAI

Uncertain

0.77

PROVEAN

Uncertain

-4.2

REVEL

Benign

0.26

Sift

Uncertain

0.016

Sift4G

Uncertain

0.022

Polyphen

0.98

Vest4

0.68

MutPred

0.50

Gain of catalytic residue at Y771 (P = 0.0202);

MVP

0.88

MPC

0.79

ClinPred

0.99

GERP RS

5.3

Varity_R

0.32

gMVP

0.87

Mutation Taster

=69/31

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over