1-45804037-C-G

Position:

• chr1-45804037-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_015112.3(MAST2):​c.142C>G​(p.Arg48Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000271 in 1,106,220 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 30)
  • Exomes 𝑓: 0.0000027 (0 hom.)
• Consequence: MAST2 NM_015112.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.430

Genes affected

MAST2 (HGNC:19035): (microtubule associated serine/threonine kinase 2) Enables phosphatase binding activity. Predicted to be involved in several processes, including peptidyl-serine phosphorylation; regulation of interleukin-12 production; and spermatid differentiation. Predicted to be located in cytoplasm and plasma membrane. Predicted to be active in microtubule cytoskeleton. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.36107033).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MAST2	NM_015112.3	c.142C>G	p.Arg48Gly	missense_variant	1/29	ENST00000361297.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MAST2	ENST00000361297.7	c.142C>G	p.Arg48Gly	missense_variant	1/29	1	NM_015112.3
MAST2	ENST00000470809.1	n.146+16905C>G		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome AF: 0.00000271 AC: 3 AN: 1106220 Hom.: 0 Cov.: 21 AF XY: 0.00000189 AC XY: 1 AN XY: 528506

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: 0.00000327

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 30

Bravo AF: 0.00000378

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

Sep 17, 2021

The c.142C>G (p.R48G) alteration is located in exon 1 (coding exon 1) of the MAST2 gene. This alteration results from a C to G substitution at nucleotide position 142, causing the arginine (R) at amino acid position 48 to be replaced by a glycine (G). 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	0.13
BayesDel_addAF	Uncertain	0.049	T
BayesDel_noAF	Benign	-0.17
CADD	Benign	20
DANN	Uncertain	0.98
DEOGEN2	Benign	0.0063	T
Eigen	Benign	0.12
Eigen_PC	Benign	0.052
FATHMM_MKL	Benign	0.51	D
LIST_S2	Benign	0.65	T
M_CAP	Pathogenic	0.63	D
MetaRNN	Benign	0.36	T
MetaSVM	Benign	-0.85	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	0.88	N;N
PrimateAI	Pathogenic	0.92	D
PROVEAN	Benign	-0.19	N
REVEL	Benign	0.17
Sift	Benign	0.12	T
Sift4G	Benign	0.088	T
Polyphen		0.98	D
Vest4		0.25
MutPred		0.25		Gain of relative solvent accessibility (P = 0.0249);
MVP		0.76
MPC		0.36
ClinPred		0.69	D
GERP RS		2.8
Varity_R		0.15
gMVP		0.16

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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

Other links and lift over

dbSNP: rs1020485123; hg19: chr1-46269709;