NM_144499.3:c.598C>G

Variant names:

• chr3-50194111-C-G
• rs786205853
• NM_144499.3:c.598C>G

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PM2 PP3_Strong PP5

The NM_144499.3(GNAT1):​c.598C>G​(p.Gln200Glu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GNAT1 NM_144499.3 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.54
• Publications: 8 publications found

Genes affected

GNAT1 (HGNC:4393): (G protein subunit alpha transducin 1) Transducin is a 3-subunit guanine nucleotide-binding protein (G protein) which stimulates the coupling of rhodopsin and cGMP-phoshodiesterase during visual impulses. The transducin alpha subunits in rods and cones are encoded by separate genes. This gene encodes the alpha subunit in rods. This gene is also expressed in other cells, and has been implicated in bitter taste transduction in rat taste cells. Mutations in this gene result in autosomal dominant congenital stationary night blindness. Multiple alternatively spliced variants, encoding the same protein, have been identified. [provided by RefSeq, Feb 2009]

GNAT1 Gene-Disease associations (from GenCC):

• congenital stationary night blindness autosomal dominant 3

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• retinal degeneration

  Inheritance: AR Classification: STRONG Submitted by: G2P
• congenital stationary night blindness

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• congenital stationary night blindness 1G

  Inheritance: AR Classification: LIMITED Submitted by: G2P

ACMG classification

Our verdict: Likely_pathogenic. The variant received 7 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.987
• PP5: Variant 3-50194111-C-G is Pathogenic according to our data. Variant chr3-50194111-C-G is described in ClinVar as Pathogenic. ClinVar VariationId is 190967.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_144499.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GNAT1	NM_144499.3	MANE Select	c.598C>G	p.Gln200Glu	missense	Exon 6 of 9	NP_653082.1
	GNAT1	NM_000172.4		c.598C>G	p.Gln200Glu	missense	Exon 6 of 9	NP_000163.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GNAT1	ENST00000232461.8	TSL:5 MANE Select	c.598C>G	p.Gln200Glu	missense	Exon 6 of 9	ENSP00000232461.3
	GNAT1	ENST00000433068.5	TSL:5	c.598C>G	p.Gln200Glu	missense	Exon 6 of 9	ENSP00000387555.1
	GNAT1	ENST00000481246.1	TSL:3	n.265C>G		non_coding_transcript_exon	Exon 3 of 3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Congenital stationary night blindness autosomal dominant 3 Pathogenic:1

Jul 01, 2007

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.93
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.32
CADD	Pathogenic	29
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.93	D
Eigen	Pathogenic	0.89
Eigen_PC	Pathogenic	0.77
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Pathogenic	0.38	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.0	D
MutationAssessor	Pathogenic	4.4	H
PhyloP100		7.5
PrimateAI	Pathogenic	0.86	D
PROVEAN	Uncertain	-2.7	D
REVEL	Pathogenic	0.91
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		0.98	D
Vest4		0.87
MutPred		0.95		Loss of MoRF binding (P = 0.0495)
MVP		0.98
MPC		1.4
ClinPred		1.0	D
GERP RS		4.4
Varity_R		0.95
gMVP		0.88
Mutation Taster		=9/91	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs786205853; hg19: chr3-50231544;