2-43813168-A-G

Position:

• chr2-43813168-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_022436.3(ABCG5):​c.1904T>C​(p.Val635Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABCG5 NM_022436.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.26

Genes affected

ABCG5 (HGNC:13886): (ATP binding cassette subfamily G member 5) The 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 White subfamily. The protein encoded by this gene functions as a half-transporter to limit intestinal absorption and promote biliary excretion of sterols. It is expressed in a tissue-specific manner in the liver, colon, and intestine. This gene is tandemly arrayed on chromosome 2, in a head-to-head orientation with family member ABCG8. Mutations in this gene may contribute to sterol accumulation and atheroschlerosis, and have been observed in patients with sitosterolemia. [provided by RefSeq, Jul 2008]

DYNC2LI1 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3387633).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCG5	NM_022436.3	c.1904T>C	p.Val635Ala	missense_variant	13/13	ENST00000405322.8	NP_071881.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCG5	ENST00000405322.8	c.1904T>C	p.Val635Ala	missense_variant	13/13	1	NM_022436.3	ENSP00000384513	P1
ABCG5	ENST00000486512.5	n.2425T>C		non_coding_transcript_exon_variant	9/9	1
ABCG5	ENST00000409962.1	n.2187T>C		non_coding_transcript_exon_variant	9/9	2
ABCG5	ENST00000644754.1	n.2288T>C		non_coding_transcript_exon_variant	10/10

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 21

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Sitosterolemia 1 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.20
BayesDel_addAF	Uncertain	0.036	T
BayesDel_noAF	Benign	-0.19
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.28	T;T
Eigen	Benign	0.014
Eigen_PC	Benign	0.18
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.68	.;T
M_CAP	Benign	0.038	D
MetaRNN	Benign	0.34	T;T
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Uncertain	2.1	M;M
MutationTaster	Benign	0.84	D;D;D
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-1.9	N;.
REVEL	Benign	0.13
Sift	Benign	0.19	T;.
Sift4G	Benign	0.18	T;.
Polyphen		0.067	B;B
Vest4		0.044
MutPred		0.53		Loss of stability (P = 0.0389);Loss of stability (P = 0.0389);
MVP		0.90
MPC		0.093
ClinPred		0.84	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.21
gMVP		0.73

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

LitVar

Other links and lift over

dbSNP: rs1666569140; hg19: chr2-44040307;