dbSNP rs72661126: MBL2:p.Leu12Val (chr10-52771602-G-C) – 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_001378373.1(MBL2):c.34C>G(p.Leu12Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000434 in 1,613,918 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

MBL2
NM_001378373.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.990

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:

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=0.10997155).

BS2

High AC in GnomAd4 at 23 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MBL2	NM_001378373.1 link	c.34C>G	p.Leu12Val	missense_variant	Exon 2 of 5	ENST00000674931.1	NP_001365302.1
MBL2	NM_000242.3 link	c.34C>G	p.Leu12Val	missense_variant	Exon 1 of 4		NP_000233.1	P11226
MBL2	NM_001378374.1 link	c.34C>G	p.Leu12Val	missense_variant	Exon 2 of 5		NP_001365303.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MBL2	ENST00000674931.1 link	c.34C>G	p.Leu12Val	missense_variant	Exon 2 of 5		NM_001378373.1	ENSP00000502789.1	P11226
MBL2	ENST00000373968.3 link	c.34C>G	p.Leu12Val	missense_variant	Exon 1 of 4	1		ENSP00000363079.3	P11226
MBL2	ENST00000675947.1 link	c.34C>G	p.Leu12Val	missense_variant	Exon 2 of 5			ENSP00000502615.1	P11226

Frequencies

GnomAD3 genomes

AF:

0.000151

AC:

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000637

AC:

AN:

251032

Hom.:

AF XY:

0.0000516

AC XY:

AN XY:

135664

show subpopulations

Gnomad AFR exome

AF:

0.000862

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000322

AC:

AN:

1461646

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

727124

show subpopulations

Gnomad4 AFR exome

AF:

0.00105

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000149

GnomAD4 genome

AF:

0.000151

AC:

AN:

152272

Hom.:

Cov.:

AF XY:

0.000148

AC XY:

AN XY:

74460

show subpopulations

Gnomad4 AFR

AF:

0.000481

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.0000397

Hom.:

Bravo

AF:

0.000219

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000741

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 01, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.34C>G (p.L12V) alteration is located in exon 1 (coding exon 1) of the MBL2 gene. This alteration results from a C to G substitution at nucleotide position 34, causing the leucine (L) at amino acid position 12 to be replaced by a valine (V). 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

0.10

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.29

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.087

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.27

FATHMM_MKL

Benign

0.71

LIST_S2

Benign

0.44

M_CAP

Benign

0.0073

MetaRNN

Benign

0.11

MetaSVM

Benign

-0.72

MutationAssessor

Benign

1.9

PrimateAI

Benign

0.36

PROVEAN

Benign

-1.7

REVEL

Benign

0.26

Sift

Benign

0.064

Sift4G

Benign

0.22

Polyphen

1.0

Vest4

0.34

MVP

0.79

MPC

0.18

ClinPred

0.054

GERP RS

3.4

Varity_R

0.086

gMVP

0.32

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

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