1-93353931-T-C

Variant names:

• chr1-93353931-T-C
• rs1666946986
• NM_001938.3:c.244T>C

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_001938.3(DR1):​c.244T>C​(p.Ser82Pro) variant causes a missense change. The variant allele was found at a frequency of 0.00000687 in 1,455,884 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000069 (0 hom.)
• Consequence: DR1 NM_001938.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.09

Genes affected

DR1 (HGNC:3017): (down-regulator of transcription 1) This gene encodes a TBP- (TATA box-binding protein) associated phosphoprotein that represses both basal and activated levels of transcription. The encoded protein is phosphorylated in vivo and this phosphorylation affects its interaction with TBP. This protein contains a histone fold motif at the amino terminus, a TBP-binding domain, and a glutamine- and alanine-rich region. The binding of DR1 repressor complexes to TBP-promoter complexes may establish a mechanism in which an altered DNA conformation, together with the formation of higher order complexes, inhibits the assembly of the preinitiation complex and controls the rate of RNA polymerase II transcription. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_benign. Variant got -4 ACMG points.

• BS2: High AC in GnomAdExome4 at 10 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DR1	NM_001938.3	c.244T>C	p.Ser82Pro	missense_variant	Exon 2 of 3	ENST00000370272.9	NP_001929.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DR1	ENST00000370272.9	c.244T>C	p.Ser82Pro	missense_variant	Exon 2 of 3	1	NM_001938.3	ENSP00000359295.3
DR1	ENST00000370267.1	c.244T>C	p.Ser82Pro	missense_variant	Exon 3 of 4	2		ENSP00000359290.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000687 AC: 10 AN: 1455884 Hom.: 0 Cov.: 30 AF XY: 0.00000691 AC XY: 5 AN XY: 724022

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: 0.00000901

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000936 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Apr 25, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.244T>C (p.S82P) alteration is located in exon 2 (coding exon 2) of the DR1 gene. This alteration results from a T to C substitution at nucleotide position 244, causing the serine (S) at amino acid position 82 to be replaced by a proline (P). 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	Benign	0.24
BayesDel_addAF	Pathogenic	0.16	D
BayesDel_noAF	Uncertain	0.0
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.12	T;T
Eigen	Uncertain	0.48
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.92	.;D
M_CAP	Benign	0.019	T
MetaRNN	Uncertain	0.61	D;D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.8	L;L
PrimateAI	Uncertain	0.75	T
PROVEAN	Uncertain	-2.4	N;N
REVEL	Benign	0.22
Sift	Benign	0.15	T;T
Sift4G	Uncertain	0.025	D;D
Polyphen		0.97	D;D
Vest4		0.67
MutPred		0.41		Loss of catalytic residue at S82 (P = 0.0346);Loss of catalytic residue at S82 (P = 0.0346);
MVP		0.57
MPC		1.5
ClinPred		0.92	D
GERP RS		6.0
Varity_R		0.83
gMVP		0.87

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: rs1666946986; hg19: chr1-93819488;