22-31420261-C-T

Position:

• chr22-31420261-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP5_Moderate

The NM_004147.4(DRG1):​c.418C>T​(p.Arg140Ter) variant causes a stop gained change. The variant allele was found at a frequency of 0.000000684 in 1,461,238 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 (★). Variant results in nonsense mediated mRNA decay.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: DRG1 NM_004147.4 stop_gained
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 4.53

Genes affected

DRG1 (HGNC:3029): (developmentally regulated GTP binding protein 1) Enables several functions, including GTPase activity; identical protein binding activity; and potassium ion binding activity. Involved in positive regulation of microtubule polymerization and regulation of mitotic spindle assembly. Located in cytosol and nuclear body. Part of polysome. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 22-31420261-C-T is Pathogenic according to our data. Variant chr22-31420261-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 2664495.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DRG1	NM_004147.4	c.418C>T	p.Arg140Ter	stop_gained	5/9	ENST00000331457.9	NP_004138.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DRG1	ENST00000331457.9	c.418C>T	p.Arg140Ter	stop_gained	5/9	1	NM_004147.4	ENSP00000329715	P1
DRG1	ENST00000433341.5	n.485C>T		non_coding_transcript_exon_variant	5/7	3
DRG1	ENST00000416465.5	c.*50C>T		3_prime_UTR_variant, NMD_transcript_variant	4/6	5		ENSP00000408091

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461238 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 726832

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Tan-Almurshedi syndrome Pathogenic:2

Likely pathogenic, criteria provided, single submitter	curation	SIB Swiss Institute of Bioinformatics	Mar 03, 2024	This variant is interpreted for Tan-Almurshedi syndrome, autosomal recessive. The following ACMG Tag(s) were applied: Absent from controls (or at extremely low frequency if recessive) in gnomAD (PM2). Predicted nullvariant in a gene where LOF is a known mechanism of disease (PVS1-strong). -
Pathogenic, no assertion criteria provided	literature only	OMIM	Dec 07, 2023	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Pathogenic	0.62
CADD	Pathogenic	37
DANN	Uncertain	1.0
Eigen	Uncertain	0.66
Eigen_PC	Uncertain	0.50
FATHMM_MKL	Uncertain	0.94	D
MutationTaster	Benign	1.0	A
Vest4		0.92
GERP RS		3.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs1459583728; hg19: chr22-31816247;