10-122576594-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_001377530.1(DMBT1):c.479G>A(p.Gly160Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000044 in 1,613,770 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 Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000026 (0 hom., cov: 33)
  • Exomes 𝑓: 0.000046 (0 hom.)
• Consequence: DMBT1 NM_001377530.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.73

Genes affected

DMBT1 (HGNC:2926): (deleted in malignant brain tumors 1) Loss of sequences from human chromosome 10q has been associated with the progression of human cancers. This gene was originally isolated based on its deletion in a medulloblastoma cell line. This gene is expressed with transcripts of 6.0, 7.5, and 8.0 kb in fetal lung and with one transcript of 8.0 kb in adult lung, although the 7.5 kb transcript has not been characterized. The encoded protein precursor is a glycoprotein containing multiple scavenger receptor cysteine-rich (SRCR) domains separated by SRCR-interspersed domains (SID). Transcript variant 2 (8.0 kb) has been shown to bind surfactant protein D independently of carbohydrate recognition. This indicates that DMBT1 may not be a classical tumor suppressor gene, but rather play a role in the interaction of tumor cells and the immune system. [provided by RefSeq, Mar 2016]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.942

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DMBT1	NM_001377530.1	c.479G>A	p.Gly160Asp	missense_variant	7/56	ENST00000338354.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DMBT1	ENST00000338354.10	c.479G>A	p.Gly160Asp	missense_variant	7/56	1	NM_001377530.1	P4

Frequencies

GnomAD3 genomes AF: 0.0000263 AC: 4 AN: 152198 Hom.: 0 Cov.: 33

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000588

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00000803 AC: 2 AN: 249202 Hom.: 0 AF XY: 0.00000740 AC XY: 1 AN XY: 135196

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000290

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: 0.00000885

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000458 AC: 67 AN: 1461572 Hom.: 0 Cov.: 33 AF XY: 0.0000454 AC XY: 33 AN XY: 727074

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.0000224

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: 0.0000549

Gnomad4 OTH exome AF: 0.0000663

GnomAD4 genome AF: 0.0000263 AC: 4 AN: 152198 Hom.: 0 Cov.: 33 AF XY: 0.0000269 AC XY: 2 AN XY: 74340

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000588

Gnomad4 OTH AF: 0.00

Bravo AF: 0.0000189

ExAC AF: 0.00000826 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 17, 2022

The c.479G>A (p.G160D) alteration is located in exon 7 (coding exon 7) of the DMBT1 gene. This alteration results from a G to A substitution at nucleotide position 479, causing the glycine (G) at amino acid position 160 to be replaced by an aspartic acid (D). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.24
Cadd	Benign	23
Dann	Uncertain	1.0
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	D;.;.;D;.;D;D
M_CAP	Benign	0.052	D
MetaRNN	Pathogenic	0.94	D;D;D;D;D;D;D
MetaSVM	Uncertain	0.70	D
MutationAssessor	Pathogenic	3.6	H;H;H;H;H;H;H
MutationTaster	Benign	1.0	D;D;D;D;D;D;D;D;D;D;D;D;D;D
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-3.3	D;D;D;D;D;D;.
REVEL	Uncertain	0.63
Sift	Pathogenic	0.0	D;D;D;D;D;D;.
Sift4G	Uncertain	0.0030	D;D;D;D;D;D;D
Polyphen		1.0	D;D;D;D;D;D;D
Vest4		0.63
MutPred		0.80		Loss of catalytic residue at G158 (P = 0.0612);Loss of catalytic residue at G158 (P = 0.0612);Loss of catalytic residue at G158 (P = 0.0612);Loss of catalytic residue at G158 (P = 0.0612);Loss of catalytic residue at G158 (P = 0.0612);Loss of catalytic residue at G158 (P = 0.0612);Loss of catalytic residue at G158 (P = 0.0612);
MVP		0.91
MPC		0.39
ClinPred		0.98	D
GERP RS		4.6
Varity_R		0.94
gMVP		0.64

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs776302731; hg19: chr10-124336110;