20-44337380-G-A

Position:

• chr20-44337380-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_178491.4(R3HDML):​c.223G>A​(p.Ala75Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,848 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: R3HDML NM_178491.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.42

Genes affected

R3HDML (HGNC:16249): (R3H domain containing like) Predicted to enable peptidase inhibitor activity. Predicted to be involved in negative regulation of peptidase activity. Predicted to be active in extracellular space. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
R3HDML	NM_178491.4	c.223G>A	p.Ala75Thr	missense_variant	1/5	ENST00000217043.4	NP_848586.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
R3HDML	ENST00000217043.4	c.223G>A	p.Ala75Thr	missense_variant	1/5	1	NM_178491.4	ENSP00000217043	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461848 Hom.: 0 Cov.: 37 AF XY: 0.00000275 AC XY: 2 AN XY: 727230

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: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

EpiCase AF: 0.0000545

EpiControl AF: 0.00

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 05, 2024

The c.223G>A (p.A75T) alteration is located in exon 1 (coding exon 1) of the R3HDML gene. This alteration results from a G to A substitution at nucleotide position 223, causing the alanine (A) at amino acid position 75 to be replaced by a threonine (T). 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	0.23
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.011	T
Eigen	Uncertain	0.47
Eigen_PC	Uncertain	0.40
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Benign	0.83	T
M_CAP	Benign	0.018	T
MetaRNN	Uncertain	0.55	D
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.5	M
MutationTaster	Benign	1.0	D
PrimateAI	Benign	0.44	T
PROVEAN	Benign	-2.3	N
REVEL	Benign	0.18
Sift	Uncertain	0.0080	D
Sift4G	Benign	0.29	T
Polyphen		0.99	D
Vest4		0.47
MutPred		0.59		Gain of glycosylation at A75 (P = 0.0463);
MVP		0.33
MPC		0.42
ClinPred		0.96	D
GERP RS		5.2
Varity_R		0.35
gMVP		0.36

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr20-42966020;