1-162776341-C-T

Variant names:

• chr1-162776341-C-T
• rs121964863
• NM_006182.4:c.2254C>T

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PM1 PP2 PP3_Strong PP5_Moderate

The NM_006182.4(DDR2):​c.2254C>T​(p.Arg752Cys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,770 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R752H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: DDR2 NM_006182.4 missense
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 7.78
• Publications: 18 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: Likely_pathogenic. The variant received 9 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
• 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, 0.982
• PP5: Variant 1-162776341-C-T is Pathogenic according to our data. Variant chr1-162776341-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 12313.Status of the report is criteria_provided_single_submitter, 1 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.2254C>T	p.Arg752Cys	missense	Exon 16 of 18	NP_006173.2
	DDR2	NM_001014796.3		c.2254C>T	p.Arg752Cys	missense	Exon 17 of 19	NP_001014796.1
	DDR2	NM_001354982.2		c.2254C>T	p.Arg752Cys	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.2254C>T	p.Arg752Cys	missense	Exon 16 of 18	ENSP00000356898.3
	DDR2	ENST00000367922.7	TSL:1	c.2254C>T	p.Arg752Cys	missense	Exon 17 of 19	ENSP00000356899.2
	DDR2	ENST00000446985.6	TSL:3	c.2254C>T	p.Arg752Cys	missense	Exon 16 of 18	ENSP00000400309.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00 AC: 0 AN: 251252 AF XY: 0.00

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461770 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727190

African (AFR) AF: 0.00 AC: 0 AN: 33470

American (AMR) AF: 0.00 AC: 0 AN: 44716

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26134

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.00 AC: 0 AN: 86254

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

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.00000540 AC: 6 AN: 1111926

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

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000141 Hom.: 0

Bravo AF: 0.00000756

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Spondyloepimetaphyseal dysplasia-short limb-abnormal calcification syndrome Pathogenic:3

Jun 01, 2010

OMIM

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

Dec 31, 2024

3billion

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is observed at an extremely low frequency in the gnomAD v4.1.0 dataset (total allele frequency: <0.001%). Predicted Consequence/Location: Missense variant Functional studies provide moderate evidence of the variant having a damaging effect on the gene or gene product (PMID: 20223752). In silico tool predictions suggest damaging effect of the variant on gene or gene product [REVEL: 0.88 (>=0.6, sensitivity 0.68 and specificity 0.92)]. The same nucleotide change resulting in the same amino acid change has been previously reported to be associated with DDR2-related disorder (ClinVar ID: VCV000012313 /PMID: 19110212 /3billion dataset).The variant has been reported to be in trans with a pathogenic variant as either compound heterozygous or homozygous in at least one similarly affected unrelated individual (PMID: 19110212, 20223752). A different missense change at the same codon (p.Arg752His) has been reported to be associated with DDR2-related disorder (PMID: 36720430). Therefore, this variant is classified as Likely pathogenic according to the recommendation of ACMG/AMP guideline.

Sep 10, 2025

Genomic Medicine Center of Excellence, King Faisal Specialist Hospital and Research Centre

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.44	D
BayesDel_noAF	Pathogenic	0.39
CADD	Pathogenic	33
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.89	D
Eigen	Pathogenic	0.94
Eigen_PC	Pathogenic	0.87
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Pathogenic	1.0	D
M_CAP	Uncertain	0.20	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Uncertain	0.70	D
MutationAssessor	Uncertain	2.5	M
PhyloP100		7.8
PrimateAI	Pathogenic	0.92	D
PROVEAN	Pathogenic	-7.6	D
REVEL	Pathogenic	0.88
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.99
MutPred		0.91		Gain of catalytic residue at W753 (P = 0.0037)
MVP		0.97
MPC		1.5
ClinPred		1.0	D
GERP RS		5.2
Varity_R		0.98
gMVP		0.89
Mutation Taster		=4/96	disease causing (ClinVar)

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: rs121964863; hg19: chr1-162746131; COSMIC: COSV63370248; COSMIC: COSV63370248;