NM_002458.3:c.845C>A

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_002458.3(MUC5B):c.845C>A(p.Ala282Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000559 in 1,534,066 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A282V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00022 ( 0 hom., cov: 34)

Exomes 𝑓: 0.00060 ( 1 hom. )

Consequence

MUC5B
NM_002458.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: -0.0240

Publications

0 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: Likely_benign. The variant received -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.08309758).

BP6

Variant 11-1228634-C-A is Benign according to our data. Variant chr11-1228634-C-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 504730.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MUC5B	NM_002458.3 link	c.845C>A	p.Ala282Glu	missense_variant	Exon 8 of 49	ENST00000529681.5	NP_002449.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
MUC5B	ENST00000529681.5 link	c.845C>A	p.Ala282Glu	missense_variant	Exon 8 of 49	5	NM_002458.3	ENSP00000436812.1
MUC5B	ENST00000525715.5 link	n.903C>A		non_coding_transcript_exon_variant	Exon 8 of 26	1
MUC5B	ENST00000531082.1 link	n.115C>A		non_coding_transcript_exon_variant	Exon 1 of 3	3

Frequencies

GnomAD3 genomes

AF:

0.000217

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000523

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:

0.000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000243

AC:

AN:

135968

AF XY:

0.000231

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000327

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000474

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000596

AC:

824

AN:

1381866

Hom.:

Cov.:

AF XY:

0.000592

AC XY:

404

AN XY:

681948

show subpopulations

African (AFR)

AF:

0.0000635

AC:

AN:

31506

American (AMR)

AF:

0.000224

AC:

AN:

35658

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25136

East Asian (EAS)

AF:

0.0000280

AC:

AN:

35704

South Asian (SAS)

AF:

0.0000126

AC:

AN:

79070

European-Finnish (FIN)

AF:

0.00

AC:

AN:

34752

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4098

European-Non Finnish (NFE)

AF:

0.000734

AC:

791

AN:

1078266

Other (OTH)

AF:

0.000364

AC:

AN:

57676

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

142

189

236

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

108

144

180

<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

AF:

0.000217

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74354

show subpopulations

African (AFR)

AF:

0.000121

AC:

AN:

41456

American (AMR)

AF:

0.000523

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10626

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000294

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.499

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.000308

Hom.:

Bravo

AF:

0.000310

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.00104

AC:

ESP6500AA

AF:

0.000846

AC:

ESP6500EA

AF:

0.000139

AC:

ExAC

AF:

0.000105

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Feb 27, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.845C>A (p.A282E) alteration is located in exon 8 (coding exon 8) of the MUC5B gene. This alteration results from a C to A substitution at nucleotide position 845, causing the alanine (A) at amino acid position 282 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear.

Apr 19, 2018

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.Ala282Glu variant in MUC5B was observed by our laboratory in the heterozyg ous state in 1 individual with pulmonary disease, but this individual also harbo red one pathogenic and one variant of uncertain significance in CFTR. This varia nt has been identified in 31/65026 European chromosomes by the Genome Aggregatio n Database (gnomAD, http://gnomad.broadinstitute.org/; dbSNP rs371465585). Alani ne (Ala) at position 282 is not conserved in mammals or evolutionarily distant s pecies and 6 species, including 2 mammals carry a glutamic acid (Glu) at this po sition, supporting that this change may be tolerated. In summary, the p.Ala282Gl u variant is likely benign based. ACMG/AMP Criteria applied: BP4, BP5.

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.48

CADD

Benign

0.23

(source)

DANN

Benign

0.41

DEOGEN2

Benign

0.015

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.028

LIST_S2

Benign

0.069

M_CAP

Benign

0.035

MetaRNN

Benign

0.083

MetaSVM

Benign

-0.92

MutationAssessor

Benign

0.43

PhyloP100

-0.024

PrimateAI

Benign

0.46

PROVEAN

Benign

-0.45

REVEL

Benign

0.16

Sift

Benign

1.0

Vest4

0.070

ClinPred

0.012

GERP RS

-6.8

Varity_R

0.059

gMVP

0.57

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.13

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

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over