2-43814506-T-G

Variant names:

• chr2-43814506-T-G
• rs146534033
• NM_022436.3:c.1733A>C

Variant summary

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

The NM_022436.3(ABCG5):​c.1733A>C​(p.Asn578Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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. N578S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABCG5 NM_022436.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.23
• Publications: 0 publications found

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:24595): (dynein cytoplasmic 2 light intermediate chain 1) This gene encodes a protein that is a component of the dynein-2 microtubule motor protein complex that plays a role in the retrograde transport of cargo in primary cilia via the intraflagellar transport system. This gene is ubiquitously expressed and its protein, which localizes to the axoneme and Golgi apparatus, interacts directly with the cytoplasmic dynein 2 heavy chain 1 protein to form part of the multi-protein dynein-2 complex. Mutations in this gene produce defects in the dynein-2 complex which result in several types of ciliopathy including short-rib thoracic dysplasia 15 with polydactyly (SRTD15). Alternative splicing results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Feb 2017]

DYNC2LI1 Gene-Disease associations (from GenCC):

• short-rib thoracic dysplasia 15 with polydactyly

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• Ellis-van Creveld syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Jeune syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_022436.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCG5	NM_022436.3	MANE Select	c.1733A>C	p.Asn578Thr	missense	Exon 12 of 13	NP_071881.1
	DYNC2LI1	NM_001348913.2		c.*15+3982T>G		intron	N/A	NP_001335842.1
	DYNC2LI1	NM_001348912.2		c.*15+3982T>G		intron	N/A	NP_001335841.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCG5	ENST00000405322.8	TSL:1 MANE Select	c.1733A>C	p.Asn578Thr	missense	Exon 12 of 13	ENSP00000384513.2
	ABCG5	ENST00000486512.5	TSL:1	n.2254A>C		non_coding_transcript_exon	Exon 8 of 9
	ABCG5	ENST00000409962.1	TSL:2	n.2016A>C		non_coding_transcript_exon	Exon 8 of 9

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.33
BayesDel_addAF	Benign	-0.042	T
BayesDel_noAF	Benign	-0.30
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.61	D
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.38
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.83	T
M_CAP	Benign	0.020	T
MetaRNN	Uncertain	0.47	T
MetaSVM	Benign	-0.47	T
MutationAssessor	Benign	1.7	L
PhyloP100		5.2
PrimateAI	Uncertain	0.53	T
PROVEAN	Uncertain	-2.8	D
REVEL	Uncertain	0.35
Sift	Benign	0.33	T
Sift4G	Benign	0.40	T
Polyphen		0.62	P
Vest4		0.38
MutPred		0.66		Gain of helix (P = 0.0199)
MVP		0.87
MPC		0.36
ClinPred		0.95	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.59
gMVP		0.86
Mutation Taster		=74/26	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs146534033; hg19: chr2-44041645;