Genetic Variant MAMSTR:p.Pro230Leu (chr19-48714400-G-A) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001130915.2(MAMSTR):c.689C>T(p.Pro230Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000647 in 1,390,452 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/20 in silico tools predict 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. P230T) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000040 ( 0 hom. )

Consequence

MAMSTR
NM_001130915.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.72

Variant links:

Genes affected

MAMSTR (HGNC:26689): (MEF2 activating motif and SAP domain containing transcriptional regulator) Predicted to enable transcription coregulator activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Predicted to act upstream of or within positive regulation of myotube differentiation and positive regulation of transcription by RNA polymerase II. Predicted to be active in nucleus. [provided by Alliance of Genome Resources, Apr 2022]

MAMSTR links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.23916888).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MAMSTR	NM_001130915.2 link	c.689C>T	p.Pro230Leu	missense_variant	Exon 7 of 10	ENST00000318083.11	NP_001124387.1	Q6ZN01-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MAMSTR	ENST00000318083.11 link	c.689C>T	p.Pro230Leu	missense_variant	Exon 7 of 10	2	NM_001130915.2	ENSP00000324175.5	Q6ZN01-1
MAMSTR	ENST00000594582.1 link	c.220-355C>T		intron_variant	Intron 4 of 6	1		ENSP00000471590.1	Q6ZN01-3
MAMSTR	ENST00000356751.8 link	c.380C>T	p.Pro127Leu	missense_variant	Exon 5 of 8	2		ENSP00000349192.3	Q6ZN01-2

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152116

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000404

AC:

AN:

1238336

Hom.:

Cov.:

AF XY:

0.00000661

AC XY:

AN XY:

604872

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:

0.0000179

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000395

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152116

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74326

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:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

ExAC

AF:

0.0000240

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 29, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.689C>T (p.P230L) alteration is located in exon 7 (coding exon 6) of the MAMSTR gene. This alteration results from a C to T substitution at nucleotide position 689, causing the proline (P) at amino acid position 230 to be replaced by a leucine (L). 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

-0.048

BayesDel_noAF

Benign

-0.31

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.19

T;.

Eigen

Benign

0.14

Eigen_PC

Benign

0.10

FATHMM_MKL

Benign

0.48

LIST_S2

Benign

0.83

T;T

M_CAP

Benign

0.080

MetaRNN

Benign

0.24

T;T

MetaSVM

Benign

-0.87

MutationAssessor

Benign

1.7

L;.

PrimateAI

Uncertain

0.73

PROVEAN

Pathogenic

-4.5

D;D

REVEL

Benign

0.10

Sift

Uncertain

0.017

D;T

Sift4G

Benign

0.22

T;D

Polyphen

0.99

D;.

Vest4

0.36

MutPred

0.23

Loss of glycosylation at P230 (P = 0.0368);.;

MVP

0.34

MPC

0.76

ClinPred

0.98

GERP RS

2.9

Varity_R

0.18

gMVP

0.33

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