rs397516981

Positions:

• chr17-39724748-T-TGGGCTCCCC

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PM4 PP5_Moderate

The NM_004448.4(ERBB2):​c.2331_2339dup​(p.Gly778_Pro780dup) variant causes a inframe insertion 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: 31)
• Consequence: ERBB2 NM_004448.4 inframe_insertion
• Clinical Significance: Pathogenic criteria provided, single submitter P:2 O:1
• Conservation: PhyloP100: 0.163

Genes affected

ERBB2 (HGNC:3430): (erb-b2 receptor tyrosine kinase 2) This gene encodes a member of the epidermal growth factor (EGF) receptor family of receptor tyrosine kinases. This protein has no ligand binding domain of its own and therefore cannot bind growth factors. However, it does bind tightly to other ligand-bound EGF receptor family members to form a heterodimer, stabilizing ligand binding and enhancing kinase-mediated activation of downstream signalling pathways, such as those involving mitogen-activated protein kinase and phosphatidylinositol-3 kinase. Allelic variations at amino acid positions 654 and 655 of isoform a (positions 624 and 625 of isoform b) have been reported, with the most common allele, Ile654/Ile655, shown here. Amplification and/or overexpression of this gene has been reported in numerous cancers, including breast and ovarian tumors. Alternative splicing results in several additional transcript variants, some encoding different isoforms and others that have not been fully characterized. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_004448.4.
• PP5: Variant 17-39724748-T-TGGGCTCCCC is Pathogenic according to our data. Variant chr17-39724748-T-TGGGCTCCCC is described in ClinVar as [Pathogenic]. Clinvar id is 44992.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ERBB2	NM_004448.4	c.2331_2339dup	p.Gly778_Pro780dup	inframe_insertion	20/27	ENST00000269571.10	NP_004439.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ERBB2	ENST00000269571.10	c.2331_2339dup	p.Gly778_Pro780dup	inframe_insertion	20/27	1	NM_004448.4	ENSP00000269571	P1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

Lung adenocarcinoma Pathogenic:1

Likely pathogenic, no assertion criteria provided

clinical testing

Key Laboratory of Carcinogenesis and Cancer Invasion, Central South University

-

- -

Non-small cell lung carcinoma Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jul 24, 2013

The c.2331_2339dupGGGCTCCCC variant in ERBB2 has previously been identified in m ulitple lung adenocarcinomas, including one patient who had a response to an Erb B family blocker (Shigematsu 2005, Han 2006, Yamanaka 2008, Arcila 2012, De Grev e 2012). Somatic ERBB2 variants have been identified in up to 9.8% of cases of lung adenocarcinoma (Cancer Genome Project and Collaborative Group 2004). -

Neoplasm Other:1

-, criteria provided, single submitter

clinical testing

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Jul 31, 2024

- -

Computational scores

Source: dbNSFP v4.3

Splicing

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

Publications

LitVar

Other links and lift over

dbSNP: rs397516981; hg19: chr17-37881001;