Genetic Variant MUC5B:p.Ala4831Ser (chr11-1251371-G-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_002458.3(MUC5B):c.14491G>T(p.Ala4831Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000216 in 1,386,288 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. A4831T) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000022 ( 0 hom. )

Consequence

MUC5B
NM_002458.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.21

Publications

4 publications found

Variant links:

Genes affected

MUC5B (HGNC:7516): (mucin 5B, oligomeric mucus/gel-forming) This gene encodes a member of the mucin family of proteins, which are highly glycosylated macromolecular components of mucus secretions. This family member is the major gel-forming mucin in mucus. It is a major contributor to the lubricating and viscoelastic properties of whole saliva, normal lung mucus and cervical mucus. This gene has been found to be up-regulated in some human diseases, including sinus mucosa of chronic rhinosinusitis (CRS), CRS with nasal polyposis, chronic obstructive pulmonary disease (COPD) and H. pylori-associated gastric disease, and it may be involved in the pathogenesis of these diseases. [provided by RefSeq, Jul 2010]

MUC5B Gene-Disease associations (from GenCC):

interstitial lung disease
Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

MUC5B links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.11902124).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MUC5B	NM_002458.3 link	c.14491G>T	p.Ala4831Ser	missense_variant	Exon 31 of 49	ENST00000529681.5	NP_002449.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MUC5B	ENST00000529681.5 link	c.14491G>T	p.Ala4831Ser	missense_variant	Exon 31 of 49	5	NM_002458.3	ENSP00000436812.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000216

AC:

AN:

1386288

Hom.:

Cov.:

AF XY:

0.00000434

AC XY:

AN XY:

690476

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.0000913

AC:

AN:

32848

American (AMR)

AF:

0.00

AC:

AN:

44296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

24920

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

85158

European-Finnish (FIN)

AF:

0.00

AC:

AN:

47592

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5722

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1048348

Other (OTH)

AF:

0.00

AC:

AN:

57708

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.292

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.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.095

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.77

CADD

Benign

1.9

(source)

DANN

Benign

0.58

DEOGEN2

Benign

0.019

Eigen

Benign

-0.72

Eigen_PC

Benign

-0.90

FATHMM_MKL

Benign

0.0093

LIST_S2

Benign

0.40

M_CAP

Benign

0.0011

MetaRNN

Benign

0.12

MetaSVM

Benign

-1.0

MutationAssessor

Benign

1.2

PhyloP100

-1.2

PrimateAI

Benign

0.21

PROVEAN

Benign

-0.45

REVEL

Benign

0.064

Sift

Benign

0.12

Vest4

0.078

ClinPred

0.077

GERP RS

1.6

Varity_R

0.035

gMVP

0.10

Mutation Taster

=95/5

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