dbSNP rs368160918: B2M:p.Ser2Tyr (chr15-44711551-C-A) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_004048.4(B2M):c.5C>A(p.Ser2Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,588 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. 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. S2F) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

B2M
NM_004048.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.567

Publications

0 publications found

Variant links:

Genes affected

B2M (HGNC:914): (beta-2-microglobulin) This gene encodes a serum protein found in association with the major histocompatibility complex (MHC) class I heavy chain on the surface of nearly all nucleated cells. The protein has a predominantly beta-pleated sheet structure that can form amyloid fibrils in some pathological conditions. The encoded antimicrobial protein displays antibacterial activity in amniotic fluid. A mutation in this gene has been shown to result in hypercatabolic hypoproteinemia.[provided by RefSeq, Aug 2014]

B2M links:

PATL2 (HGNC:33630): (PAT1 homolog 2) Predicted to enable RNA binding activity. Predicted to be involved in P-body assembly and deadenylation-dependent decapping of nuclear-transcribed mRNA. Predicted to act upstream of or within negative regulation of cytoplasmic mRNA processing body assembly. Located in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

PATL2 Gene-Disease associations (from GenCC):

oocyte maturation defect 4
Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)

PATL2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.27124006).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
B2M	NM_004048.4 link	c.5C>A	p.Ser2Tyr	missense_variant	Exon 1 of 4	ENST00000648006.3	NP_004039.1	P61769
PATL2	NM_001387263.1 link	c.-785G>T		upstream_gene_variant		ENST00000682850.1	NP_001374192.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
B2M	ENST00000648006.3 link	c.5C>A	p.Ser2Tyr	missense_variant	Exon 1 of 4		NM_004048.4	ENSP00000497910.1		P61769
PATL2	ENST00000682850.1 link	c.-785G>T		upstream_gene_variant			NM_001387263.1	ENSP00000508024.1		C9JE40

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461588

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727108

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53126

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1112008

Other (OTH)

AF:

0.00

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.57

CADD

Benign

(source)

DANN

Benign

0.95

DEOGEN2

Benign

0.026

T;T;T;T

Eigen

Benign

-0.46

Eigen_PC

Benign

-0.57

FATHMM_MKL

Benign

0.40

M_CAP

Benign

0.031

MetaRNN

Benign

0.27

T;T;T;T

MetaSVM

Benign

-0.82

MutationAssessor

Benign

1.1

.;L;L;L

PhyloP100

0.57

PrimateAI

Benign

0.43

PROVEAN

Benign

-2.0

N;N;N;.

REVEL

Benign

0.076

Sift

Uncertain

0.011

D;D;D;.

Sift4G

Uncertain

0.0070

D;D;D;.

Polyphen

0.95

P;P;P;P

Vest4

0.26

MutPred

0.28

Loss of disorder (P = 0.0313);Loss of disorder (P = 0.0313);Loss of disorder (P = 0.0313);Loss of disorder (P = 0.0313);

MVP

0.47

MPC

1.2

ClinPred

0.54

GERP RS

2.4

PromoterAI

-0.054

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.11

gMVP

0.51

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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over