chr1-162753097-A-G

Variant names:

• chr1-162753097-A-G
• rs775988877
• NM_006182.4:c.85A>G

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 1P and 10B. PP2 BP4_Strong BP6_Moderate BS2

The NM_006182.4(DDR2):​c.85A>G​(p.Ile29Val) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000958 in 1,460,956 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I29L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000096 (0 hom.)
• Consequence: DDR2 NM_006182.4 missense, splice_region
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.18

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 Benign. Variant got -9 ACMG points.

• PP2: Missense variant in the DDR2 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 12 curated pathogenic missense variants (we use a threshold of 10). The gene has 3 curated benign missense variants. Gene score misZ: 2.2869 (below the threshold of 3.09). Trascript score misZ: 3.8204 (above the threshold of 3.09). GenCC associations: The gene is linked to warburg-cinotti syndrome, spondyloepimetaphyseal dysplasia-short limb-abnormal calcification syndrome.
• BP4: Computational evidence support a benign effect (MetaRNN=0.038492024).
• BP6: Variant 1-162753097-A-G is Benign according to our data. Variant chr1-162753097-A-G is described in ClinVar as [Likely_benign]. Clinvar id is 2496217.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS2: High AC in GnomAdExome4 at 14 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DDR2	NM_006182.4	c.85A>G	p.Ile29Val	missense_variant, splice_region_variant	Exon 4 of 18	ENST00000367921.8	NP_006173.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DDR2	ENST00000367921.8	c.85A>G	p.Ile29Val	missense_variant, splice_region_variant	Exon 4 of 18	1	NM_006182.4	ENSP00000356898.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.0000120 AC: 3 AN: 250994 Hom.: 0 AF XY: 0.0000221 AC XY: 3 AN XY: 135618

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000958 AC: 14 AN: 1460956 Hom.: 0 Cov.: 31 AF XY: 0.00000963 AC XY: 7 AN XY: 726824

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.0000247 AC: 3

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Benign:1

Mar 14, 2023

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.053
BayesDel_addAF	Benign	-0.16	T
BayesDel_noAF	Benign	-0.30
CADD	Benign	4.7
DANN	Benign	0.87
DEOGEN2	Benign	0.20	T;.;T;T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.19	N
LIST_S2	Benign	0.73	.;T;.;T
M_CAP	Uncertain	0.14	D
MetaRNN	Benign	0.038	T;T;T;T
MetaSVM	Benign	-0.76	T
MutationAssessor	Benign	-0.81	N;.;N;N
PrimateAI	Benign	0.30	T
PROVEAN	Benign	0.44	N;N;N;N
REVEL	Uncertain	0.30
Sift	Benign	1.0	T;T;T;T
Sift4G	Benign	0.58	T;T;T;T
Polyphen		0.0	B;.;B;B
Vest4		0.10, 0.10
MutPred		0.23		Loss of catalytic residue at L34 (P = 0.1002);Loss of catalytic residue at L34 (P = 0.1002);Loss of catalytic residue at L34 (P = 0.1002);Loss of catalytic residue at L34 (P = 0.1002);
MVP		0.46
MPC		0.36
ClinPred		0.024	T
GERP RS		-5.2
Varity_R		0.034
gMVP		0.33

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

Publications

LitVar

Other links and lift over

dbSNP: rs775988877; hg19: chr1-162722887;