chr17-68877520-G-T

Variant names:

• chr17-68877520-G-T
• rs768328938
• NM_001288985.2:c.4198C>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001288985.2(ABCA8):​c.4198C>A​(p.Arg1400Arg) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,612,412 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ABCA8 NM_001288985.2 splice_region, synonymous
• Scores: Splicing: ADA: 0.0002840
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.170
• Publications: 2 publications found

Genes affected

ABCA8 (HGNC:38): (ATP binding cassette subfamily A member 8) 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 intracellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the ABC1 subfamily. Members of the ABC1 subfamily comprise the only major ABC subfamily found exclusively in multicellular eukaryotes. The encoded protein may regulate lipid metabolism and be involved in the formation and maintenance of myelin. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

LOC105371874 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.83).
• BP7: Synonymous conserved (PhyloP=-0.17 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001288985.2. 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
	ABCA8	NM_001288985.2	MANE Select	c.4198C>A	p.Arg1400Arg	splice_region synonymous	Exon 33 of 40	NP_001275914.1	O94911-3
	ABCA8	NM_001288986.2		c.4183C>A	p.Arg1395Arg	splice_region synonymous	Exon 32 of 39	NP_001275915.1	A0A0A0MSU4
	ABCA8	NM_007168.4		c.4078C>A	p.Arg1360Arg	splice_region synonymous	Exon 31 of 38	NP_009099.1	O94911-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCA8	ENST00000586539.6	TSL:1 MANE Select	c.4198C>A	p.Arg1400Arg	splice_region synonymous	Exon 33 of 40	ENSP00000467271.1	O94911-3
	ABCA8	ENST00000430352.6	TSL:1	c.4183C>A	p.Arg1395Arg	splice_region synonymous	Exon 32 of 39	ENSP00000402814.3	A0A0A0MSU4
	ABCA8	ENST00000269080.6	TSL:1	c.4078C>A	p.Arg1360Arg	splice_region synonymous	Exon 31 of 38	ENSP00000269080.1	O94911-1

Frequencies

GnomAD3 genomes AF: 0.00000658 AC: 1 AN: 152048 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1460364 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 726422

African (AFR) AF: 0.00 AC: 0 AN: 33450

American (AMR) AF: 0.00 AC: 0 AN: 44646

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26014

East Asian (EAS) AF: 0.00 AC: 0 AN: 39680

South Asian (SAS) AF: 0.00 AC: 0 AN: 86008

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53336

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5760

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111114

Other (OTH) AF: 0.00 AC: 0 AN: 60356

GnomAD4 genome AF: 0.00000658 AC: 1 AN: 152048 Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1 AN XY: 74274

African (AFR) AF: 0.00 AC: 0 AN: 41382

American (AMR) AF: 0.00 AC: 0 AN: 15266

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4816

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10600

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 314

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68006

Other (OTH) AF: 0.00 AC: 0 AN: 2092

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.83
CADD	Benign	0.70
DANN	Benign	0.51
PhyloP100		-0.17

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.00028
dbscSNV1_RF	Benign	0.21
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: rs768328938; hg19: chr17-66873661;