1-162775707-A-G

Position:

• chr1-162775707-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PM1 PM2 PP2 BP4

The NM_006182.4(DDR2):​c.1912A>G​(p.Ile638Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,848 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: DDR2 NM_006182.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.25

Genes affected

DDR2 (HGNC:2731): (discoidin domain receptor tyrosine kinase 2) This gene encodes a member of the discoidin domain receptor subclass of the receptor tyrosine kinase (RTKs) protein family. RTKs play a key role in the communication of cells with their microenvironment. The encoded protein is a collagen-induced receptor that activates signal transduction pathways involved in cell adhesion, proliferation, and extracellular matrix remodeling. This protein is expressed in numerous cell types and may alos be involved in wound repair and regulate tumor growth and invasiveness. Mutations in this gene are the cause of short limb-hand type spondylometaepiphyseal dysplasia. [provided by RefSeq, Aug 2017]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a domain Protein kinase (size 286) in uniprot entity DDR2_HUMAN there are 6 pathogenic changes around while only 2 benign (75%) in NM_006182.4
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), DDR2. . Gene score misZ 2.2869 (greater than the threshold 3.09). Trascript score misZ 3.8204 (greater than threshold 3.09). GenCC has associacion of gene with warburg-cinotti syndrome, spondyloepimetaphyseal dysplasia-short limb-abnormal calcification syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.3996024).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DDR2	NM_006182.4	c.1912A>G	p.Ile638Val	missense_variant	15/18	ENST00000367921.8	NP_006173.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DDR2	ENST00000367921.8	c.1912A>G	p.Ile638Val	missense_variant	15/18	1	NM_006182.4	ENSP00000356898.3
DDR2	ENST00000367922.7	c.1912A>G	p.Ile638Val	missense_variant	16/19	1		ENSP00000356899.2
DDR2	ENST00000446985.6	c.1912A>G	p.Ile638Val	missense_variant	15/18	3		ENSP00000400309.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251184 Hom.: 0 AF XY: 0.00000737 AC XY: 1 AN XY: 135736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461848 Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2 AN XY: 727230

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Uncertain	0.055	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.41	T;T;T
Eigen	Benign	-0.21
Eigen_PC	Benign	0.021
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.95	.;.;D
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.40	T;T;T
MetaSVM	Benign	-0.68	T
MutationAssessor	Benign	-0.70	N;N;N
PrimateAI	Uncertain	0.64	T
PROVEAN	Benign	-0.19	.;N;N
REVEL	Uncertain	0.39
Sift	Benign	0.19	.;T;T
Sift4G	Benign	0.81	.;T;T
Polyphen		0.52	P;P;P
Vest4		0.33, 0.33
MutPred		0.50		Gain of catalytic residue at I638 (P = 0.0202);Gain of catalytic residue at I638 (P = 0.0202);Gain of catalytic residue at I638 (P = 0.0202);
MVP		0.72
MPC		0.41
ClinPred		0.89	D
GERP RS		5.1
Varity_R		0.30
gMVP		0.45

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		Details are displayed if max score is > 0.2

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

Publications

LitVar

Other links and lift over

dbSNP: rs1057519789; hg19: chr1-162745497;