chr4-155696994-A-G

Position:

• chr4-155696994-A-G

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001130682.3(GUCY1A1):​c.127A>G​(p.Thr43Ala) 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. 15/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. T43T) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: GUCY1A1 NM_001130682.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.318

Genes affected

GUCY1A1 (HGNC:4685): (guanylate cyclase 1 soluble subunit alpha 1) Soluble guanylate cyclases are heterodimeric proteins that catalyze the conversion of GTP to 3',5'-cyclic GMP and pyrophosphate. The protein encoded by this gene is an alpha subunit of this complex and it interacts with a beta subunit to form the guanylate cyclase enzyme, which is activated by nitric oxide. Several transcript variants encoding a few different isoforms have been found for this gene. [provided by RefSeq, Jan 2012]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.032396644).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GUCY1A1	NM_001130682.3	c.127A>G	p.Thr43Ala	missense_variant	3/10	ENST00000506455.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GUCY1A1	ENST00000506455.6	c.127A>G	p.Thr43Ala	missense_variant	3/10	1	NM_001130682.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 22, 2023

The c.127A>G (p.T43A) alteration is located in exon 3 (coding exon 1) of the GUCY1A3 gene. This alteration results from a A to G substitution at nucleotide position 127, causing the threonine (T) at amino acid position 43 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.056
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.48
CADD	Benign	0.17
DANN	Benign	0.38
DEOGEN2	Benign	0.053	T;T;T;.;T;T;T
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.027	N
LIST_S2	Benign	0.47	.;T;.;T;.;.;T
M_CAP	Benign	0.039	D
MetaRNN	Benign	0.032	T;T;T;T;T;T;T
MetaSVM	Benign	-0.85	T
MutationTaster	Benign	1.0	N;N;N;N;N;N;N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	-0.070	N;.;N;N;N;N;N
REVEL	Benign	0.13
Sift	Benign	0.74	T;.;T;T;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T;T;T
Polyphen		0.0	B;.;B;.;B;B;B
Vest4		0.021
MutPred		0.14		Loss of glycosylation at T43 (P = 0.0308);Loss of glycosylation at T43 (P = 0.0308);Loss of glycosylation at T43 (P = 0.0308);Loss of glycosylation at T43 (P = 0.0308);Loss of glycosylation at T43 (P = 0.0308);Loss of glycosylation at T43 (P = 0.0308);Loss of glycosylation at T43 (P = 0.0308);
MVP		0.63
MPC		0.073
ClinPred		0.015	T
GERP RS		-3.9
Varity_R		0.029
gMVP		0.20

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr4-156618146;