chr10-102230772-GC-G

Variant names:

• chr10-102230772-GC-G
• rs1564991256
• NM_005029.4:c.650delG

Variant summary

Our verdict is Likely pathogenic. The variant received 7 ACMG points: 7P and 0B. PVS1_Strong PM2 PP5

The NM_005029.4(PITX3):​c.650delG​(p.Gly217AlafsTer92) 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).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PITX3 NM_005029.4 frameshift
• Clinical Significance: Pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 1.25
• Publications: 2 publications found

Genes affected

PITX3 (HGNC:9006): (paired like homeodomain 3) This gene encodes a member of the RIEG/PITX homeobox family, which is in the bicoid class of homeodomain proteins. Members of this family act as transcription factors. This protein is involved in lens formation during eye development. Mutations of this gene have been associated with anterior segment mesenchymal dysgenesis and congenital cataracts. [provided by RefSeq, Jul 2008]

GBF1 (HGNC:4181): (golgi brefeldin A resistant guanine nucleotide exchange factor 1) This gene encodes a member of the Sec7 domain family. The encoded protein is a guanine nucleotide exchange factor that regulates the recruitment of proteins to membranes by mediating GDP to GTP exchange. The encoded protein is localized to the Golgi apparatus and plays a role in vesicular trafficking by activating ADP ribosylation factor 1. The encoded protein has also been identified as an important host factor for viral replication. Multiple transcript variants have been observed for this gene. [provided by RefSeq, Dec 2010]

GBF1 Gene-Disease associations (from GenCC):

• axonal neuropathy

  Inheritance: AD Classification: STRONG Submitted by: Franklin by Genoox

ACMG classification

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

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 5 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 10-102230772-GC-G is Pathogenic according to our data. Variant chr10-102230772-GC-G is described in ClinVar as Pathogenic. ClinVar VariationId is 6939.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005029.4. 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
	PITX3	NM_005029.4	MANE Select	c.650delG	p.Gly217AlafsTer92	frameshift	Exon 4 of 4	NP_005020.1	O75364
	GBF1	NM_001391923.1		c.-152delC		5_prime_UTR	Exon 1 of 40	NP_001378852.1	Q92538-2
	GBF1	NM_001391924.1		c.-290delC		5_prime_UTR	Exon 1 of 41	NP_001378853.1	Q92538-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PITX3	ENST00000370002.8	TSL:1 MANE Select	c.650delG	p.Gly217AlafsTer92	frameshift	Exon 4 of 4	ENSP00000359019.3	O75364

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
1	-	-	Cataract 11, posterior polar (1)
1	-	-	Cataract 11, posterior polar, with microphthalmia and neurodevelopmental abnormalities (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.3
Mutation Taster		=0/200	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: rs1564991256; hg19: chr10-103990529;