14-21294747-A-C

Variant names:

• chr14-21294747-A-C
• NM_020366.4:c.156A>C
• RPGRIP1 p.Arg52Arg

Variant summary

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

The NM_020366.4(RPGRIP1):​c.156A>C​(p.Arg52Arg) 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.

• Frequency: Genomes: not found (cov: 30)
• Consequence: RPGRIP1 NM_020366.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.434
• Publications: 0 publications found

Genes affected

RPGRIP1 (HGNC:13436): (RPGR interacting protein 1) This gene encodes a photoreceptor protein that interacts with retinitis pigmentosa GTPase regulator protein and is a key component of cone and rod photoreceptor cells. Mutations in this gene lead to autosomal recessive congenital blindness. [provided by RefSeq, Oct 2008]

RPGRIP1 Gene-Disease associations (from GenCC):

• cone-rod dystrophy 13

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: PanelApp Australia, G2P
• Leber congenital amaurosis 6

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• cone-rod dystrophy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Leber congenital amaurosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

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=-0.61).
• BP7: Synonymous conserved (PhyloP=-0.434 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020366.4. 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
	RPGRIP1	NM_020366.4	MANE Select	c.156A>C	p.Arg52Arg	synonymous	Exon 3 of 25	NP_065099.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RPGRIP1	ENST00000400017.7	TSL:1 MANE Select	c.156A>C	p.Arg52Arg	synonymous	Exon 3 of 25	ENSP00000382895.2	Q96KN7-1
	RPGRIP1	ENST00000557771.5	TSL:5	c.156A>C	p.Arg52Arg	synonymous	Exon 2 of 24	ENSP00000451219.1	G3V3F7
	RPGRIP1	ENST00000556336.5	TSL:5	c.156A>C	p.Arg52Arg	synonymous	Exon 2 of 21	ENSP00000450445.1	G3V236

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.61
CADD	Benign	4.2
DANN	Benign	0.68
PhyloP100		-0.43

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr14-21762906; COSMIC: COSV52848411;