chr17-8016448-G-GCAAC

Variant names:

• chr17-8016448-G-GCAAC
• rs386834239
• NM_000180.4:c.3233_3236dupACCA

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_000180.4(GUCY2D):​c.3233_3236dupACCA​(p.His1079GlnfsTer54) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (no stars). Synonymous variant affecting the same amino acid position (i.e. H1079H) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: GUCY2D NM_000180.4 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 0.530
• Publications: 1 publications found

Genes affected

GUCY2D (HGNC:4689): (guanylate cyclase 2D, retinal) This gene encodes a retina-specific guanylate cyclase, which is a member of the membrane guanylyl cyclase family. Like other membrane guanylyl cyclases, this enzyme has a hydrophobic amino-terminal signal sequence followed by a large extracellular domain, a single membrane spanning domain, a kinase homology domain, and a guanylyl cyclase catalytic domain. In contrast to other membrane guanylyl cyclases, this enzyme is not activated by natriuretic peptides. Mutations in this gene result in Leber congenital amaurosis and cone-rod dystrophy-6 diseases. [provided by RefSeq, Dec 2008]

GUCY2D Gene-Disease associations (from GenCC):

• cone-rod dystrophy

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: G2P, Orphanet
• GUCY2D-related dominant retinopathy

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• GUCY2D-related recessive retinopathy

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• Leber congenital amaurosis 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• cone-rod dystrophy 6

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• night blindness, congenital stationary, type1i

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Leber congenital amaurosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• central areolar choroidal dystrophy

  Inheritance: AR, AD Classification: SUPPORTIVE, LIMITED Submitted by: G2P, Orphanet

ENSG00000279174 (HGNC:):

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 17-8016448-G-GCAAC is Pathogenic according to our data. Variant chr17-8016448-G-GCAAC is described in ClinVar as Pathogenic. ClinVar VariationId is 65572.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000180.4. 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
	GUCY2D	NM_000180.4	MANE Select	c.3233_3236dupACCA	p.His1079GlnfsTer54	frameshift	Exon 19 of 20	NP_000171.1	Q02846

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GUCY2D	ENST00000254854.5	TSL:1 MANE Select	c.3233_3236dupACCA	p.His1079GlnfsTer54	frameshift	Exon 19 of 20	ENSP00000254854.4	Q02846
	GUCY2D	ENST00000574510.1	TSL:4	n.171_174dupACCA		non_coding_transcript_exon	Exon 2 of 2
	ENSG00000279174	ENST00000623126.1	TSL:6	n.-74_-71dupGTTG		upstream_gene	N/A

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Early-onset retinal dystrophy (1)
1	-	-	Leber congenital amaurosis 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		0.53
Mutation Taster		=6/194	disease causing (ClinVar)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs386834239; hg19: chr17-7919766;