12-14669726-G-C

Variant names:

• chr12-14669726-G-C
• NM_004963.4:c.1278C>G
• GUCY2C p.Gly426Gly

Variant summary

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

The NM_004963.4(GUCY2C):​c.1278C>G​(p.Gly426Gly) 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. G426G) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: GUCY2C NM_004963.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.168
• Publications: 0 publications found

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

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=-0.79).
• BP7: Synonymous conserved (PhyloP=-0.168 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004963.4. 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
	GUCY2C	NM_004963.4	MANE Select	c.1278C>G	p.Gly426Gly	synonymous	Exon 10 of 27	NP_004954.2	P25092
	GUCY2C-AS1	NR_186173.1		n.335+1580G>C		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GUCY2C	ENST00000261170.5	TSL:1 MANE Select	c.1278C>G	p.Gly426Gly	synonymous	Exon 10 of 27	ENSP00000261170.3	P25092
	GUCY2C	ENST00000867619.1		c.1278C>G	p.Gly426Gly	synonymous	Exon 10 of 28	ENSP00000537678.1
	GUCY2C	ENST00000970783.1		c.1278C>G	p.Gly426Gly	synonymous	Exon 10 of 26	ENSP00000640842.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1343144 Hom.: 0 Cov.: 19 AF XY: 0.00 AC XY: 0 AN XY: 674530

African (AFR) AF: 0.00 AC: 0 AN: 30714

American (AMR) AF: 0.00 AC: 0 AN: 42254

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25096

East Asian (EAS) AF: 0.00 AC: 0 AN: 38740

South Asian (SAS) AF: 0.00 AC: 0 AN: 81644

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53262

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5510

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1009568

Other (OTH) AF: 0.00 AC: 0 AN: 56356

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	5.7
DANN	Benign	0.70
PhyloP100		-0.17

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.15		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: chr12-14822660;