rs747978928

Variant names:

• chr2-29193242-C-A
• rs747978928
• NM_004304.5:c.4845G>T

Your query was ambiguous. Multiple possible variants found:

• chr2-29193242-C-A
• chr2-29193242-C-G
• chr2-29193242-C-T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_004304.5(ALK):​c.4845G>T​(p.Met1615Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,808 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. M1615T) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: ALK NM_004304.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.173
• 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]

CLIP4 (HGNC:26108): (CAP-Gly domain containing linker protein family member 4) Predicted to enable microtubule plus-end binding activity. Predicted to be involved in cytoplasmic microtubule organization. Located in intracellular membrane-bounded organelle. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.03587073).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004304.5. 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
	ALK	NM_004304.5	MANE Select	c.4845G>T	p.Met1615Ile	missense	Exon 29 of 29	NP_004295.2
	ALK	NM_001353765.2		c.1641G>T	p.Met547Ile	missense	Exon 10 of 10	NP_001340694.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALK	ENST00000389048.8	TSL:1 MANE Select	c.4845G>T	p.Met1615Ile	missense	Exon 29 of 29	ENSP00000373700.3
	ALK	ENST00000638605.1	TSL:1	n.1722G>T		non_coding_transcript_exon	Exon 11 of 11
	ALK	ENST00000618119.4	TSL:5	c.3714G>T	p.Met1238Ile	missense	Exon 28 of 28	ENSP00000482733.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461808 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727206

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000232 AC: 2 AN: 86212

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5748

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111996

Other (OTH) AF: 0.00 AC: 0 AN: 60392

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Benign	-0.40	T
BayesDel_noAF	Benign	-0.81
CADD	Benign	0.86
DANN	Benign	0.91
DEOGEN2	Benign	0.024	T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.066	N
LIST_S2	Benign	0.64	T
M_CAP	Benign	0.017	T
MetaRNN	Benign	0.036	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.34	N
PhyloP100		-0.17
PrimateAI	Benign	0.31	T
PROVEAN	Benign	-1.3	N
REVEL	Benign	0.045
Sift	Benign	0.89	T
Sift4G	Benign	0.35	T
Polyphen		0.0	B
Vest4		0.038
MutPred		0.11		Gain of glycosylation at S1614 (P = 0.1421)
MVP		0.18
MPC		0.19
ClinPred		0.060	T
GERP RS		-5.6
Varity_R		0.086
gMVP		0.22
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: rs747978928; hg19: chr2-29416108;