Genetic Variant MBL2:p.Arg52Ser (chr10-52771482-G-T) – 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_001378373.1(MBL2):c.154C>A(p.Arg52Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,614 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. R52C) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

MBL2
NM_001378373.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.972

Publications

266 publications found

Variant links:

Genes affected

MBL2 (HGNC:6922): (mannose binding lectin 2) This gene encodes the soluble mannose-binding lectin or mannose-binding protein found in serum. The protein encoded belongs to the collectin family and is an important element in the innate immune system. The protein recognizes and binds to mannose and N-acetylglucosamine on many microorganisms, including bacteria, yeast, and viruses including influenza virus, HIV and SARS-CoV. This binding activates the classical complement pathway. Deficiencies of this gene have been associated with susceptibility to autoimmune and infectious diseases. [provided by RefSeq, Jun 2020]

MBL2 links:

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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=0.28390634).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
MBL2	NM_001378373.1 link	c.154C>A	p.Arg52Ser	missense_variant	Exon 2 of 5	ENST00000674931.1	NP_001365302.1
MBL2	NM_000242.3 link	c.154C>A	p.Arg52Ser	missense_variant	Exon 1 of 4		NP_000233.1
MBL2	NM_001378374.1 link	c.154C>A	p.Arg52Ser	missense_variant	Exon 2 of 5		NP_001365303.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
MBL2	ENST00000674931.1 link	c.154C>A	p.Arg52Ser	missense_variant	Exon 2 of 5		NM_001378373.1	ENSP00000502789.1
MBL2	ENST00000373968.3 link	c.154C>A	p.Arg52Ser	missense_variant	Exon 1 of 4	1		ENSP00000363079.3
MBL2	ENST00000675947.1 link	c.154C>A	p.Arg52Ser	missense_variant	Exon 2 of 5			ENSP00000502615.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461614

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727112

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26112

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.00

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5744

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111832

Other (OTH)

AF:

0.0000166

AC:

AN:

60372

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.:

Alfa

AF:

0.00

Hom.:

1489

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.59

BayesDel_addAF

Uncertain

0.014

BayesDel_noAF

Benign

-0.22

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.47

Eigen

Benign

-0.078

Eigen_PC

Benign

-0.12

FATHMM_MKL

Benign

0.057

LIST_S2

Uncertain

0.91

M_CAP

Benign

0.039

MetaRNN

Benign

0.28

MetaSVM

Uncertain

0.54

MutationAssessor

Benign

1.5

PhyloP100

0.97

PrimateAI

Benign

0.30

PROVEAN

Uncertain

-3.3

REVEL

Uncertain

0.29

Sift

Benign

0.033

Sift4G

Benign

0.065

Vest4

0.12

ClinPred

0.92

GERP RS

3.1

PromoterAI

-0.024

Neutral

(source)

Varity_R

0.30

gMVP

0.36

Mutation Taster

=72/28

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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over