Genetic Variant RMDN3:p.Arg341His (chr15-40738526-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_018145.3(RMDN3):c.1022G>A(p.Arg341His) variant causes a missense change. The variant allele was found at a frequency of 0.0000161 in 1,613,950 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

RMDN3
NM_018145.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.32

Variant links:

Genes affected

RMDN3 (HGNC:25550): (regulator of microtubule dynamics 3) Enables microtubule binding activity. Involved in cellular calcium ion homeostasis. Located in several cellular components, including intercellular bridge; mitochondrial outer membrane; and spindle. [provided by Alliance of Genome Resources, Apr 2022]

RMDN3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
RMDN3	NM_018145.3 link	c.1022G>A	p.Arg341His	missense_variant	Exon 8 of 13	ENST00000338376.8	NP_060615.1	Q96TC7-1A0A024R9P6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
RMDN3	ENST00000338376.8 link	c.1022G>A	p.Arg341His	missense_variant	Exon 8 of 13	1	NM_018145.3	ENSP00000342493.3	Q96TC7-1
RMDN3	ENST00000558777.5 link	n.*573G>A		non_coding_transcript_exon_variant	Exon 9 of 14	2		ENSP00000453357.1	H0YLV7
RMDN3	ENST00000558777.5 link	n.*573G>A		3_prime_UTR_variant	Exon 9 of 14	2		ENSP00000453357.1	H0YLV7

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152104

Hom.:

Cov.:

show subpopulations

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:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000796

AC:

AN:

251332

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135830

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000326

GnomAD4 exome

AF:

0.0000171

AC:

AN:

1461846

Hom.:

Cov.:

AF XY:

0.0000124

AC XY:

AN XY:

727218

show subpopulations

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:

0.0000189

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152104

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74284

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000102

Hom.:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 10, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1022G>A (p.R341H) alteration is located in exon 8 (coding exon 7) of the RMDN3 gene. This alteration results from a G to A substitution at nucleotide position 1022, causing the arginine (R) at amino acid position 341 to be replaced by a histidine (H). 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

0.16

BayesDel_addAF

Benign

-0.047

BayesDel_noAF

Benign

-0.29

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.38

T;T;.

Eigen

Pathogenic

0.77

Eigen_PC

Pathogenic

0.74

FATHMM_MKL

Uncertain

0.76

LIST_S2

Uncertain

0.95

.;D;D

M_CAP

Benign

0.034

MetaRNN

Uncertain

0.64

D;D;D

MetaSVM

Benign

-0.50

MutationAssessor

Uncertain

2.3

M;M;.

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-3.7

D;D;D

REVEL

Uncertain

0.33

Sift

Uncertain

0.0050

D;D;D

Sift4G

Uncertain

0.0090

D;D;D

Polyphen

1.0

D;D;.

Vest4

0.48

MutPred

0.76

Loss of catalytic residue at R341 (P = 0.0501);Loss of catalytic residue at R341 (P = 0.0501);.;

MVP

0.67

MPC

0.72

ClinPred

0.99

GERP RS

5.4

Varity_R

0.38

gMVP

0.34

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over