NM_000443.4:c.147C>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -19 ACMG points: 0P and 19B. BP4_ModerateBP6_Very_StrongBP7BA1

The NM_000443.4(ABCB4):c.147C>T(p.Ser49Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00304 in 1,613,490 control chromosomes in the GnomAD database, including 136 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. S49S) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.016 ( 69 hom., cov: 32)

Exomes 𝑓: 0.0017 ( 67 hom. )

Consequence

ABCB4
NM_000443.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: -0.270

Publications

6 publications found

Variant links:

Genes affected

ABCB4 (HGNC:45): (ATP binding cassette subfamily B member 4) The membrane-associated protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the MDR/TAP subfamily. Members of the MDR/TAP subfamily are involved in multidrug resistance as well as antigen presentation. This gene encodes a full transporter and member of the p-glycoprotein family of membrane proteins with phosphatidylcholine as its substrate. The function of this protein has not yet been determined; however, it may involve transport of phospholipids from liver hepatocytes into bile. Alternative splicing of this gene results in several products of undetermined function. [provided by RefSeq, Jul 2008]

ABCB4 Gene-Disease associations (from GenCC):

progressive familial intrahepatic cholestasis type 3
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Orphanet
gallbladder disease 1
Inheritance: SD, AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet
pancreatitis
Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ABCB4 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -19 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.34).

BP6

Variant 7-87462897-G-A is Benign according to our data. Variant chr7-87462897-G-A is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 256157.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.27 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0545 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCB4	NM_000443.4 link	c.147C>T	p.Ser49Ser	synonymous_variant	Exon 4 of 28	ENST00000649586.2	NP_000434.1	P21439-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCB4	ENST00000649586.2 link	c.147C>T	p.Ser49Ser	synonymous_variant	Exon 4 of 28		NM_000443.4	ENSP00000496956.2		P21439-2

Frequencies

GnomAD3 genomes

AF:

0.0161

AC:

2454

AN:

151978

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0562

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00537

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000416

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0158

Gnomad NFE

AF:

0.000265

Gnomad OTH

AF:

0.0105

GnomAD2 exomes

AF:

0.00429

AC:

1077

AN:

251130

AF XY:

0.00322

show subpopulations

Gnomad AFR exome

AF:

0.0561

Gnomad AMR exome

AF:

0.00345

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000229

Gnomad OTH exome

AF:

0.00294

GnomAD4 exome

AF:

0.00167

AC:

2439

AN:

1461394

Hom.:

Cov.:

AF XY:

0.00146

AC XY:

1060

AN XY:

726996

show subpopulations

African (AFR)

AF:

0.0544

AC:

1818

AN:

33402

American (AMR)

AF:

0.00398

AC:

178

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39666

South Asian (SAS)

AF:

0.000151

AC:

AN:

86196

European-Finnish (FIN)

AF:

0.0000374

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00347

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000191

AC:

212

AN:

1111720

Other (OTH)

AF:

0.00323

AC:

195

AN:

60384

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.445

Heterozygous variant carriers

104

208

312

416

520

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

120

180

240

300

<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:

0.0162

AC:

2469

AN:

152096

Hom.:

Cov.:

AF XY:

0.0155

AC XY:

1149

AN XY:

74346

show subpopulations

African (AFR)

AF:

0.0564

AC:

2340

AN:

41480

American (AMR)

AF:

0.00537

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5176

South Asian (SAS)

AF:

0.000416

AC:

AN:

4804

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10586

Middle Eastern (MID)

AF:

0.0170

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000265

AC:

AN:

67990

Other (OTH)

AF:

0.0104

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

121

243

364

486

607

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

112

140

<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:

0.00668

Hom.:

Bravo

AF:

0.0178

Asia WGS

AF:

0.00404

AC:

AN:

3478

EpiCase

AF:

0.000218

EpiControl

AF:

0.00

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:2

Feb 24, 2016

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

PreventionGenetics, part of Exact Sciences

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:2

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Cholestasis, intrahepatic, of pregnancy, 3

Benign:1

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Progressive familial intrahepatic cholestasis type 3

Benign:1

Apr 28, 2017

Illumina Laboratory Services, Illumina

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to determine this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.34

CADD

Benign

(source)

DANN

Benign

0.81

PhyloP100

-0.27

Mutation Taster

=98/2

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.080

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