Genetic Variant MRTFA:p.His1026Asn (chr22-40411410-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_020831.6(MRTFA):c.3076C>A(p.His1026Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000707 in 1,413,876 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. H1026Y) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 7.1e-7 ( 0 hom. )

Consequence

MRTFA
NM_020831.6 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 8.94

Publications

0 publications found

Variant links:

Genes affected

MRTFA (HGNC:14334): (myocardin related transcription factor A) The protein encoded by this gene interacts with the transcription factor myocardin, a key regulator of smooth muscle cell differentiation. The encoded protein is predominantly nuclear and may help transduce signals from the cytoskeleton to the nucleus. This gene is involved in a specific translocation event that creates a fusion of this gene and the RNA-binding motif protein-15 gene. This translocation has been associated with acute megakaryocytic leukemia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]

MRTFA Gene-Disease associations (from GenCC):

immunodeficiency 66
Inheritance: AR, Unknown Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)

MRTFA links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 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
MRTFA	NM_020831.6 link	c.3076C>A	p.His1026Asn	missense_variant	Exon 15 of 15	ENST00000355630.10	NP_065882.2	Q969V6A4FUJ8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MRTFA	ENST00000355630.10 link	c.3076C>A	p.His1026Asn	missense_variant	Exon 15 of 15	1	NM_020831.6	ENSP00000347847.5		A0A499FIJ6

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.07e-7

AC:

AN:

1413876

Hom.:

Cov.:

AF XY:

0.00000144

AC XY:

AN XY:

695206

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32714

American (AMR)

AF:

0.00

AC:

AN:

42262

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

23520

East Asian (EAS)

AF:

0.00

AC:

AN:

38838

South Asian (SAS)

AF:

0.00

AC:

AN:

80640

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52108

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5564

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1080058

Other (OTH)

AF:

0.0000172

AC:

AN:

58172

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.091

BayesDel_addAF

Benign

-0.029

BayesDel_noAF

Benign

-0.28

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.47

T;T;T;T;T;T

Eigen

Uncertain

0.51

Eigen_PC

Uncertain

0.54

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.91

.;D;D;D;T;D

M_CAP

Benign

0.025

MetaRNN

Uncertain

0.54

D;D;D;D;D;D

MetaSVM

Benign

-0.95

PhyloP100

8.9

PrimateAI

Pathogenic

0.81

PROVEAN

Uncertain

-4.2

D;.;D;D;.;.

REVEL

Benign

0.27

Sift

Benign

0.45

T;.;T;T;.;.

Sift4G

Benign

0.62

T;T;T;T;T;T

Polyphen

0.99

D;.;D;D;.;.

Vest4

0.65

MutPred

0.44

Loss of disorder (P = 0.1509);.;.;Loss of disorder (P = 0.1509);.;.;

MVP

0.42

MPC

0.29

ClinPred

0.95

GERP RS

4.8

Varity_R

0.56

Mutation Taster

=54/46

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over