rs867957895

Variant names:

• chr4-47936432-C-G
• rs867957895
• NM_001379270.1:c.2050G>C

Your query was ambiguous. Multiple possible variants found:

• chr4-47936432-C-G
• chr4-47936432-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001379270.1(CNGA1):​c.2050G>C​(p.Asp684His) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D684V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CNGA1 NM_001379270.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.771
• Publications: 2 publications found

Genes affected

CNGA1 (HGNC:2148): (cyclic nucleotide gated channel subunit alpha 1) The protein encoded by this gene is involved in phototransduction. Along with another protein, the encoded protein forms a cGMP-gated cation channel in the plasma membrane, allowing depolarization of rod photoreceptors. This represents the last step in the phototransduction pathway. Defects in this gene are a cause of retinitis pigmentosa autosomal recessive (ARRP) disease. Multiple transcript variants have been found for this gene. [provided by RefSeq, Oct 2019]

NIPAL1 (HGNC:27194): (NIPA like domain containing 1) Predicted to enable magnesium ion transmembrane transporter activity. Predicted to be involved in magnesium ion transport. Predicted to be integral component of membrane. Predicted to be active in membrane. [provided by Alliance of Genome Resources, Apr 2022]

LOC101927157 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.18345132).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001379270.1. 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
	CNGA1	NM_001379270.1	MANE Select	c.2050G>C	p.Asp684His	missense	Exon 11 of 11	NP_001366199.1	P29973
	CNGA1	NM_000087.5		c.2050G>C	p.Asp684His	missense	Exon 11 of 11	NP_000078.3	P29973
	CNGA1	NM_001142564.2		c.2050G>C	p.Asp684His	missense	Exon 10 of 10	NP_001136036.2	P29973

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CNGA1	ENST00000514170.7	TSL:5 MANE Select	c.2050G>C	p.Asp684His	missense	Exon 11 of 11	ENSP00000426862.3	P29973
	CNGA1	ENST00000402813.9	TSL:1	c.2050G>C	p.Asp684His	missense	Exon 10 of 10	ENSP00000384264.5	P29973
	CNGA1	ENST00000420489.7	TSL:2	c.2050G>C	p.Asp684His	missense	Exon 11 of 11	ENSP00000389881.3	P29973

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.068	T
BayesDel_noAF	Benign	-0.14
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.063	T
Eigen	Benign	-0.39
Eigen_PC	Benign	-0.42
FATHMM_MKL	Benign	0.20	N
LIST_S2	Benign	0.67	T
M_CAP	Uncertain	0.16	D
MetaRNN	Benign	0.18	T
MetaSVM	Uncertain	0.21	D
MutationAssessor	Benign	1.6	L
PhyloP100		0.77
PrimateAI	Benign	0.36	T
PROVEAN	Benign	-0.92	N
REVEL	Uncertain	0.30
Sift	Uncertain	0.0040	D
Sift4G	Uncertain	0.011	D
Polyphen		0.77	P
Vest4		0.095
MutPred		0.16		Gain of sheet (P = 0.0073)
MVP		0.76
MPC		0.53
ClinPred		0.61	D
GERP RS		3.9
Varity_R		0.11
gMVP		0.18
Mutation Taster		=93/7	polymorphism

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: rs867957895; hg19: chr4-47938449;