4-155794001-G-T

Variant names:

• chr4-155794001-G-T
• rs1739365451
• NM_000857.5:c.641G>T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000857.5(GUCY1B1):​c.641G>T​(p.Cys214Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,460,748 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: GUCY1B1 NM_000857.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.60

Genes affected

GUCY1B1 (HGNC:4687): (guanylate cyclase 1 soluble subunit beta 1) This gene encodes the beta subunit of the soluble guanylate cyclase (sGC), which catalyzes the conversion of GTP (guanosine triphosphate) to cGMP (cyclic guanosine monophosphate). The encoded protein contains an HNOX domain, which serves as a receptor for ligands such as nitric oxide, oxygen and nitrovasodilator drugs. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.926

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GUCY1B1	NM_000857.5	c.641G>T	p.Cys214Phe	missense_variant	Exon 6 of 14	ENST00000264424.13	NP_000848.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GUCY1B1	ENST00000264424.13	c.641G>T	p.Cys214Phe	missense_variant	Exon 6 of 14	1	NM_000857.5	ENSP00000264424.8

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460748 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 726764

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jun 12, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.641G>T (p.C214F) alteration is located in exon 6 (coding exon 6) of the GUCY1B3 gene. This alteration results from a G to T substitution at nucleotide position 641, causing the cysteine (C) at amino acid position 214 to be replaced by a phenylalanine (F). 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	Pathogenic	0.88
BayesDel_addAF	Pathogenic	0.43	D
BayesDel_noAF	Pathogenic	0.38
CADD	Pathogenic	32
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.63	D;.;.;.;D;.;D
Eigen	Pathogenic	0.81
Eigen_PC	Pathogenic	0.84
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	.;D;D;D;D;D;D
M_CAP	Benign	0.055	D
MetaRNN	Pathogenic	0.93	D;D;D;D;D;D;D
MetaSVM	Uncertain	0.36	D
MutationAssessor	Benign	2.0	.;.;.;.;M;M;.
PrimateAI	Pathogenic	0.88	D
PROVEAN	Pathogenic	-9.6	D;D;D;D;D;D;D
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D;D;D;D;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D;D;D
Polyphen		0.99, 1.0, 0.95, 1.0	.;D;.;D;P;D;.
Vest4		0.90
MVP		0.96
MPC		0.062
ClinPred		1.0	D
GERP RS		5.9
Varity_R		0.97
gMVP		0.90

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

LitVar

Other links and lift over

dbSNP: rs1739365451; hg19: chr4-156715153;