NM_006182.4:c.2177T>G

Variant names:

• chr1-162776264-T-G
• rs121964864
• NM_006182.4:c.2177T>G

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PM1 PM2 PP2 PP3_Strong PP5

The NM_006182.4(DDR2):​c.2177T>G​(p.Ile726Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 13/22 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. I726T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DDR2 NM_006182.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 7.89
• Publications: 8 publications found

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]

DDR2 Gene-Disease associations (from GenCC):

• spondyloepimetaphyseal dysplasia-short limb-abnormal calcification syndrome

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae), G2P, Orphanet
• warburg-cinotti syndrome

  Inheritance: Unknown, AD Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, G2P, Illumina, Ambry Genetics

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PM1: In a domain Protein kinase (size 286) in uniprot entity DDR2_HUMAN there are 7 pathogenic changes around while only 1 benign (88%) in NM_006182.4
• PM2: Very rare variant in population databases, with high coverage
• 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.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.99
• PP5: Variant 1-162776264-T-G is Pathogenic according to our data. Variant chr1-162776264-T-G is described in ClinVar as Pathogenic. ClinVar VariationId is 12314.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006182.4. 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
	DDR2	NM_006182.4	MANE Select	c.2177T>G	p.Ile726Arg	missense	Exon 16 of 18	NP_006173.2
	DDR2	NM_001014796.3		c.2177T>G	p.Ile726Arg	missense	Exon 17 of 19	NP_001014796.1
	DDR2	NM_001354982.2		c.2177T>G	p.Ile726Arg	missense	Exon 16 of 18	NP_001341911.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DDR2	ENST00000367921.8	TSL:1 MANE Select	c.2177T>G	p.Ile726Arg	missense	Exon 16 of 18	ENSP00000356898.3
	DDR2	ENST00000367922.7	TSL:1	c.2177T>G	p.Ile726Arg	missense	Exon 17 of 19	ENSP00000356899.2
	DDR2	ENST00000446985.6	TSL:3	c.2177T>G	p.Ile726Arg	missense	Exon 16 of 18	ENSP00000400309.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Spondyloepimetaphyseal dysplasia-short limb-abnormal calcification syndrome Pathogenic:1

Jun 01, 2010

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	28
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.95	D
Eigen	Pathogenic	1.0
Eigen_PC	Pathogenic	0.89
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.97	D
M_CAP	Pathogenic	0.68	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	3.9	H
PhyloP100		7.9
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-6.6	D
REVEL	Pathogenic	0.79
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.98
MutPred		0.91		Gain of MoRF binding (P = 0.0256)
MVP		0.98
MPC		1.7
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.99
gMVP		0.99
Mutation Taster		=0/100	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs121964864; hg19: chr1-162746054;