7-87402277-G-T
Position:
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PP2PP3_Moderate
The NM_000443.4(ABCB4):c.3659C>A(p.Ala1220Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 33)
Consequence
ABCB4
NM_000443.4 missense
NM_000443.4 missense
Scores
10
7
2
Clinical Significance
Conservation
PhyloP100: 8.12
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]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 7 ACMG points.
PM1
In a topological_domain Cytoplasmic (size 291) in uniprot entity MDR3_HUMAN there are 5 pathogenic changes around while only 1 benign (83%) in NM_000443.4
PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ABCB4. . Gene score misZ: 1.9749 (greater than the threshold 3.09). Trascript score misZ: 3.5425 (greater than threshold 3.09). The gene has 32 curated pathogenic missense variants (we use a threshold of 10). The gene has 6 curated benign missense variants. GenCC has associacion of the gene with pancreatitis, low phospholipid associated cholelithiasis, progressive familial intrahepatic cholestasis type 3.
PP3
MetaRNN computational evidence supports a deleterious effect, 0.911
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes
GnomAD3 genomes
Cov.:
33
GnomAD4 exome Cov.: 30
GnomAD4 exome
Cov.:
30
GnomAD4 genome
GnomAD4 genome
Cov.:
33
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not specified Uncertain:1
| Uncertain significance, criteria provided, single submitter | clinical testing | Mendelics | May 04, 2022 | - - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
CADD
Pathogenic
DANN
Uncertain
DEOGEN2
Pathogenic
.;.;D;.;.
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
.;D;D;D;.
M_CAP
Uncertain
D
MetaRNN
Pathogenic
D;D;D;D;D
MetaSVM
Benign
T
MutationAssessor
Uncertain
.;.;M;.;.
PrimateAI
Uncertain
T
PROVEAN
Pathogenic
.;D;D;D;D
REVEL
Pathogenic
Sift
Pathogenic
.;D;D;D;D
Sift4G
Pathogenic
.;D;D;D;D
Polyphen
D;.;D;D;.
Vest4
0.85, 0.78, 0.84, 0.84
MutPred
0.76
.;.;Gain of disorder (P = 0.0497);.;.;
MVP
0.90
MPC
1.2
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.