NM_020975.6:c.2694_2705delTGTTTATGAAGA

Variant names:

• chr10-43120163-GAGATGTTTATGA-G
• rs121913309
• NM_020975.6:c.2694_2705delTGTTTATGAAGA

Variant summary

Our verdict is Uncertain significance. The variant received 5 ACMG points: 5P and 0B. PM1 PM4 PP3

The NM_020975.6(RET):​c.2694_2705delTGTTTATGAAGA​(p.Asp898_Glu901del) variant causes a disruptive inframe deletion change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type DEL_BIG, and the frequency of such variant types in population databases may be underestimated and unreliable. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. D898D) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: RET NM_020975.6 disruptive_inframe_deletion
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 10.0
• Publications: 1 publications found

Genes affected

RET (HGNC:9967): (ret proto-oncogene) This gene encodes a transmembrane receptor and member of the tyrosine protein kinase family of proteins. Binding of ligands such as GDNF (glial cell-line derived neurotrophic factor) and other related proteins to the encoded receptor stimulates receptor dimerization and activation of downstream signaling pathways that play a role in cell differentiation, growth, migration and survival. The encoded receptor is important in development of the nervous system, and the development of organs and tissues derived from the neural crest. This proto-oncogene can undergo oncogenic activation through both cytogenetic rearrangement and activating point mutations. Mutations in this gene are associated with Hirschsprung disease and central hypoventilation syndrome and have been identified in patients with renal agenesis. [provided by RefSeq, Sep 2017]

RET Gene-Disease associations (from GenCC):

• familial medullary thyroid carcinoma

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, G2P
• multiple endocrine neoplasia type 2A

  Inheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: Orphanet, ClinGen, G2P
• multiple endocrine neoplasia type 2B

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
• pheochromocytoma

  Inheritance: AD Classification: DEFINITIVE Submitted by: G2P
• Hirschsprung disease, susceptibility to, 1

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Haddad syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Hirschsprung disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• renal agenesis, unilateral

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• bilateral renal agenesis

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• renal agenesis

  Inheritance: AR Classification: LIMITED Submitted by: G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 5 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 15 uncertain in NM_020975.6
• PM4: Nonframeshift variant in NON repetitive region in NM_020975.6.
• PP3: No computational evidence supports a deleterious effect, but strongly conserved according to phyloP

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020975.6. 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
	RET	NM_020975.6	MANE Select	c.2694_2705delTGTTTATGAAGA	p.Asp898_Glu901del	disruptive_inframe_deletion	Exon 15 of 20	NP_066124.1
	RET	NM_001406743.1		c.2694_2705delTGTTTATGAAGA	p.Asp898_Glu901del	disruptive_inframe_deletion	Exon 15 of 21	NP_001393672.1
	RET	NM_001406744.1		c.2694_2705delTGTTTATGAAGA	p.Asp898_Glu901del	disruptive_inframe_deletion	Exon 15 of 20	NP_001393673.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RET	ENST00000355710.8	TSL:5 MANE Select	c.2694_2705delTGTTTATGAAGA	p.Asp898_Glu901del	disruptive_inframe_deletion	Exon 15 of 20	ENSP00000347942.3
	RET	ENST00000340058.6	TSL:1	c.2694_2705delTGTTTATGAAGA	p.Asp898_Glu901del	disruptive_inframe_deletion	Exon 15 of 19	ENSP00000344798.4
	RET	ENST00000713926.1		c.2430_2441delTGTTTATGAAGA	p.Asp810_Glu813del	disruptive_inframe_deletion	Exon 15 of 19	ENSP00000519223.1

Frequencies

GnomAD3 genomes Cov.: 33

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

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Hereditary cancer-predisposing syndrome Uncertain:1

Apr 19, 2018

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2694_2705del12 variant (also known as p.D898_E901del) is located in coding exon 15 of the RET gene. This variant results from an in-frame deletion of 12 nucleotides at positions 2694 to 2705. This results in the deletion of 4 amino acids between codons 898 and 901. This amino acid region is highly conserved in available vertebrate species. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		10

Splicing

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

Other links and lift over

dbSNP: rs121913309; hg19: chr10-43615611;