12-20855073-G-T

Variant names:

• chr12-20855073-G-T
• rs1408642500
• NM_019844.4:c.130G>T

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_019844.4(SLCO1B3):​c.130G>T​(p.Gly44Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/22 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. G44S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SLCO1B3 NM_019844.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.0520
• Publications: 1 publications found

Genes affected

SLCO1B3 (HGNC:10961): (solute carrier organic anion transporter family member 1B3) This gene encodes a liver-specific member of the organic anion transporter family. The encoded protein is a transmembrane receptor that mediates the sodium-independent uptake of endogenous and xenobiotic compounds and plays a critical role in bile acid and bilirubin transport. Mutations in this gene are a cause of Rotor type hyperbilirubinemia. Alternative splicing of this gene and the use of alternative promoters results in transcript variants encoding different isoforms that differ in their tissue specificity. [provided by RefSeq, Mar 2017]

SLCO1B3-SLCO1B7 (HGNC:54403): (SLCO1B3-SLCO1B7 readthrough) This locus represents naturally occurring readthrough transcription between the neighboring SLCO1B3 (solute carrier organic anion transporter family member 1B3) and SLCO1B7 (solute carrier organic anion transporter family member 1B7 (putative)) genes on chromosome 12. The readthrough transcript encodes a protein that shares sequence identity with both the upstream and downstream genes. [provided by RefSeq, Jun 2019]

ACMG classification

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=0.18623492).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_019844.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLCO1B3	NM_019844.4	MANE Select	c.130G>T	p.Gly44Cys	missense	Exon 4 of 16	NP_062818.1	Q9NPD5-1
	SLCO1B3-SLCO1B7	NM_001371097.1		c.130G>T	p.Gly44Cys	missense	Exon 2 of 16	NP_001358026.1	A0A0A6YYJ9
	SLCO1B3	NM_001349920.2		c.46G>T	p.Gly16Cys	missense	Exon 2 of 14	NP_001336849.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLCO1B3	ENST00000381545.8	TSL:2 MANE Select	c.130G>T	p.Gly44Cys	missense	Exon 4 of 16	ENSP00000370956.4	Q9NPD5-1
	SLCO1B3-SLCO1B7	ENST00000540229.1	TSL:2	c.130G>T	p.Gly44Cys	missense	Exon 2 of 16	ENSP00000441269.1
	SLCO1B3	ENST00000261196.6	TSL:1	c.130G>T	p.Gly44Cys	missense	Exon 2 of 14	ENSP00000261196.2	Q9NPD5-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 250994 AF XY: 0.00000737

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1459806 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 726280

African (AFR) AF: 0.00 AC: 0 AN: 33434

American (AMR) AF: 0.00 AC: 0 AN: 44706

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26120

East Asian (EAS) AF: 0.00 AC: 0 AN: 39666

South Asian (SAS) AF: 0.00 AC: 0 AN: 86156

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53356

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4722

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111416

Other (OTH) AF: 0.00 AC: 0 AN: 60230

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Benign	0.010	T
BayesDel_noAF	Benign	-0.22
CADD	Benign	15
DANN	Benign	0.80
DEOGEN2	Benign	0.17	T
Eigen	Benign	-0.86
Eigen_PC	Benign	-1.0
FATHMM_MKL	Benign	0.023	N
LIST_S2	Benign	0.81	T
M_CAP	Uncertain	0.088	D
MetaRNN	Benign	0.19	T
MetaSVM	Benign	-0.52	T
MutationAssessor	Uncertain	2.3	M
PhyloP100		-0.052
PrimateAI	Benign	0.28	T
PROVEAN	Pathogenic	-4.7	D
REVEL	Benign	0.17
Sift	Benign	0.093	T
Sift4G	Benign	0.13	T
Polyphen		0.022	B
Vest4		0.28
MutPred		0.54		Gain of catalytic residue at K49 (P = 0)
MVP		0.59
MPC		0.033
ClinPred		0.10	T
GERP RS		-2.8
Varity_R		0.29
gMVP		0.36
Mutation Taster		=94/6	polymorphism

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

Other links and lift over

dbSNP: rs1408642500; hg19: chr12-21008007; COSMIC: COSV53937278; COSMIC: COSV53937278;