6-24777278-AAATC-A

Variant names:

• chr6-24777278-AAATC-A
• rs864309487
• NM_015895.5:c.35_38delTCAA

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PVS1_Strong PM2 PP5_Moderate

The NM_015895.5(GMNN):​c.35_38delTCAA​(p.Ile12LysfsTer4) 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 (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GMNN NM_015895.5 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 1.46
• Publications: 2 publications found

Genes affected

GMNN (HGNC:17493): (geminin DNA replication inhibitor) This gene encodes a protein that plays a critical role in cell cycle regulation. The encoded protein inhibits DNA replication by binding to DNA replication factor Cdt1, preventing the incorporation of minichromosome maintenance proteins into the pre-replication complex. The encoded protein is expressed during the S and G2 phases of the cell cycle and is degraded by the anaphase-promoting complex during the metaphase-anaphase transition. Increased expression of this gene may play a role in several malignancies including colon, rectal and breast cancer. Alternatively spliced transcript variants have been observed for this gene, and two pseudogenes of this gene are located on the short arm of chromosome 16. [provided by RefSeq, Oct 2011]

GMNN Gene-Disease associations (from GenCC):

• Meier-Gorlin syndrome 6

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• Meier-Gorlin syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. Fraction of 0.944 CDS is truncated, and there are 2 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 6-24777278-AAATC-A is Pathogenic according to our data. Variant chr6-24777278-AAATC-A is described in ClinVar as Pathogenic. ClinVar VariationId is 204000.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_015895.5. 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
	GMNN	NM_015895.5	MANE Select	c.35_38delTCAA	p.Ile12LysfsTer4	frameshift	Exon 2 of 7	NP_056979.1
	GMNN	NM_001251989.2		c.35_38delTCAA	p.Ile12LysfsTer4	frameshift	Exon 2 of 7	NP_001238918.1
	GMNN	NM_001251990.2		c.35_38delTCAA	p.Ile12LysfsTer4	frameshift	Exon 2 of 7	NP_001238919.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GMNN	ENST00000230056.8	TSL:1 MANE Select	c.35_38delTCAA	p.Ile12LysfsTer4	frameshift	Exon 2 of 7	ENSP00000230056.3
	GMNN	ENST00000356509.7	TSL:2	c.35_38delTCAA	p.Ile12LysfsTer4	frameshift	Exon 2 of 7	ENSP00000348902.3
	GMNN	ENST00000620958.4	TSL:3	c.35_38delTCAA	p.Ile12LysfsTer4	frameshift	Exon 2 of 7	ENSP00000477506.1

Frequencies

GnomAD3 genomes Cov.: 32

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Meier-Gorlin syndrome Pathogenic:1

Jun 17, 2015

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

This frameshift variant was found once de novo in a 17-year-old male with Meier-Gorlin syndrome.

Meier-Gorlin syndrome 6 Pathogenic:1

Dec 03, 2015

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.5
Mutation Taster		=3/197	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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: rs864309487; hg19: chr6-24777506;