Genetic Variant MKX:p.Arg278His (chr10-27734461-C-T) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_173576.3(MKX):c.833G>A(p.Arg278His) variant causes a missense change. The variant allele was found at a frequency of 0.0000229 in 1,613,304 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R278C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

MKX
NM_173576.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.82

Variant links:

Genes affected

MKX (HGNC:23729): (mohawk homeobox) The protein encoded by this gene is an IRX family-related homeobox protein that may play a role in cell adhesion. Studies in mice suggest that this protein may be a regulator of tendon development. Two transcript variants encoding the same protein have been found for this gene.[provided by RefSeq, Jun 2011]

MKX links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.1524289).

BS2

High AC in GnomAd4 at 16 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MKX	NM_173576.3 link	c.833G>A	p.Arg278His	missense_variant	Exon 5 of 7	ENST00000419761.6	NP_775847.2	Q8IYA7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MKX	ENST00000419761.6 link	c.833G>A	p.Arg278His	missense_variant	Exon 5 of 7	2	NM_173576.3	ENSP00000400896.1	Q8IYA7
MKX	ENST00000375790.9 link	c.833G>A	p.Arg278His	missense_variant	Exon 5 of 7	1		ENSP00000364946.4	Q8IYA7
MKX	ENST00000460919.2 link	c.833G>A	p.Arg278His	missense_variant	Exon 4 of 5	3		ENSP00000452751.1	H0YKC7

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152162

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000362

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000319

AC:

AN:

250540

Hom.:

AF XY:

0.0000369

AC XY:

AN XY:

135398

show subpopulations

Gnomad AFR exome

AF:

0.000492

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:

0.00

GnomAD4 exome

AF:

0.0000144

AC:

AN:

1461142

Hom.:

Cov.:

AF XY:

0.0000206

AC XY:

AN XY:

726840

show subpopulations

Gnomad4 AFR exome

AF:

0.000329

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000720

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000105

AC:

AN:

152162

Hom.:

Cov.:

AF XY:

0.0000942

AC XY:

AN XY:

74322

show subpopulations

Gnomad4 AFR

AF:

0.000362

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000984

Hom.:

Bravo

AF:

0.000125

ExAC

AF:

0.0000494

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

Dec 04, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.833G>A (p.R278H) alteration is located in exon 5 (coding exon 4) of the MKX gene. This alteration results from a G to A substitution at nucleotide position 833, causing the arginine (R) at amino acid position 278 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

0.089

BayesDel_addAF

Benign

-0.054

BayesDel_noAF

Uncertain

0.040

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.065

T;T;.

Eigen

Benign

0.18

Eigen_PC

Uncertain

0.38

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.91

D;.;D

M_CAP

Benign

0.038

MetaRNN

Benign

0.15

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.3

L;L;.

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-0.49

N;N;N

REVEL

Benign

0.23

Sift

Benign

0.24

T;T;T

Sift4G

Benign

0.19

T;T;.

Polyphen

0.040

B;B;.

Vest4

0.63

MVP

0.88

MPC

0.63

ClinPred

0.20

GERP RS

6.0

Varity_R

0.062

gMVP

0.32

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