12-14669785-C-G

Variant names:

• chr12-14669785-C-G
• NM_004963.4:c.1219G>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004963.4(GUCY2C):​c.1219G>C​(p.Val407Leu) variant causes a missense 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. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GUCY2C NM_004963.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.450

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-AS1 (HGNC:56054): (GUCY2C antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.09691629).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GUCY2C	NM_004963.4	c.1219G>C	p.Val407Leu	missense_variant	Exon 10 of 27	ENST00000261170.5	NP_004954.2
GUCY2C	XM_011520631.3	c.973G>C	p.Val325Leu	missense_variant	Exon 10 of 27		XP_011518933.1
GUCY2C-AS1	NR_186173.1	n.335+1639C>G		intron_variant	Intron 3 of 5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GUCY2C	ENST00000261170.5	c.1219G>C	p.Val407Leu	missense_variant	Exon 10 of 27	1	NM_004963.4	ENSP00000261170.3
GUCY2C-AS1	ENST00000501178.2	n.199-2481C>G		intron_variant	Intron 2 of 4	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 26

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Nov 16, 2021

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 407 of the GUCY2C protein (p.Val407Leu). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with GUCY2C-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	0.22
DANN	Benign	0.56
DEOGEN2	Benign	0.15	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.029	N
LIST_S2	Benign	0.37	T
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.097	T
MetaSVM	Benign	-0.95	T
MutationAssessor	Uncertain	2.3	M
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-0.50	N
REVEL	Benign	0.049
Sift	Benign	0.34	T
Sift4G	Benign	0.35	T
Polyphen		0.027	B
Vest4		0.11
MutPred		0.35		Gain of catalytic residue at K403 (P = 0.0362);
MVP		0.48
MPC		0.18
ClinPred		0.045	T
GERP RS		-2.2
Varity_R		0.046
gMVP		0.39

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-14822719;