2-29275157-G-C

Variant names:

• chr2-29275157-G-C
• rs758860363
• NM_004304.5:c.1983C>G

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_004304.5(ALK):​c.1983C>G​(p.Asn661Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. N661D) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ALK NM_004304.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.470
• Publications: 0 publications found

Genes affected

ALK (HGNC:427): (ALK receptor tyrosine kinase) This gene encodes a receptor tyrosine kinase, which belongs to the insulin receptor superfamily. This protein comprises an extracellular domain, an hydrophobic stretch corresponding to a single pass transmembrane region, and an intracellular kinase domain. It plays an important role in the development of the brain and exerts its effects on specific neurons in the nervous system. This gene has been found to be rearranged, mutated, or amplified in a series of tumours including anaplastic large cell lymphomas, neuroblastoma, and non-small cell lung cancer. The chromosomal rearrangements are the most common genetic alterations in this gene, which result in creation of multiple fusion genes in tumourigenesis, including ALK (chromosome 2)/EML4 (chromosome 2), ALK/RANBP2 (chromosome 2), ALK/ATIC (chromosome 2), ALK/TFG (chromosome 3), ALK/NPM1 (chromosome 5), ALK/SQSTM1 (chromosome 5), ALK/KIF5B (chromosome 10), ALK/CLTC (chromosome 17), ALK/TPM4 (chromosome 19), and ALK/MSN (chromosome X).[provided by RefSeq, Jan 2011]

ALK Gene-Disease associations (from GenCC):

• neuroblastoma, susceptibility to, 3

  Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, ClinGen, Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.13021594).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALK	NM_004304.5	c.1983C>G	p.Asn661Lys	missense_variant	Exon 11 of 29	ENST00000389048.8	NP_004295.2
ALK	XR_001738688.3	n.2910C>G		non_coding_transcript_exon_variant	Exon 11 of 18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ALK	ENST00000389048.8	c.1983C>G	p.Asn661Lys	missense_variant	Exon 11 of 29	1	NM_004304.5	ENSP00000373700.3
ALK	ENST00000618119.4	c.852C>G	p.Asn284Lys	missense_variant	Exon 10 of 28	5		ENSP00000482733.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.40
CADD	Benign	17
DANN	Uncertain	0.99
DEOGEN2	Benign	0.094	T;.
Eigen	Benign	-0.40
Eigen_PC	Benign	-0.30
FATHMM_MKL	Benign	0.19	N
LIST_S2	Benign	0.66	T;T
M_CAP	Benign	0.062	D
MetaRNN	Benign	0.13	T;T
MetaSVM	Benign	-0.90	T
MutationAssessor	Benign	1.8	L;.
PhyloP100		0.47
PrimateAI	Benign	0.37	T
PROVEAN	Benign	0.0	N;.
REVEL	Benign	0.076
Sift	Benign	0.28	T;.
Sift4G	Benign	0.85	T;T
Polyphen		0.016	B;.
Vest4		0.22
MutPred		0.26		Gain of methylation at N661 (P = 0.0122);.;
MVP		0.68
MPC		0.20
ClinPred		0.084	T
GERP RS		2.3
Varity_R		0.073
gMVP		0.40
Mutation Taster		=95/5	polymorphism

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: rs758860363; hg19: chr2-29498023; COSMIC: COSV66560210;