rs771821923

Variant names:

• chr16-2295663-C-A
• rs771821923
• NM_001089.3:c.2341G>T

Your query was ambiguous. Multiple possible variants found:

• chr16-2295663-C-A
• chr16-2295663-C-G
• chr16-2295663-C-T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001089.3(ABCA3):​c.2341G>T​(p.Val781Leu) 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. 15/22 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 nucleotide change resulting in the same amino acid substitution has been previously reported as Uncertain significance in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V781M) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABCA3 NM_001089.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.41
• Publications: 3 publications found

Genes affected

ABCA3 (HGNC:33): (ATP binding cassette subfamily A member 3) 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 full transporter encoded by this gene may be involved in development of resistance to xenobiotics and engulfment during programmed cell death. [provided by RefSeq, Jul 2008]

ABCA3 Gene-Disease associations (from GenCC):

• interstitial lung disease due to ABCA3 deficiency

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3551172).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001089.3. 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
	ABCA3	NM_001089.3	MANE Select	c.2341G>T	p.Val781Leu	missense	Exon 18 of 33	NP_001080.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCA3	ENST00000301732.10	TSL:1 MANE Select	c.2341G>T	p.Val781Leu	missense	Exon 18 of 33	ENSP00000301732.5
	ABCA3	ENST00000382381.7	TSL:1	c.2167G>T	p.Val723Leu	missense	Exon 17 of 32	ENSP00000371818.3
	ABCA3	ENST00000563623.5	TSL:1	n.2904G>T		non_coding_transcript_exon	Exon 18 of 20

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.42
BayesDel_addAF	Benign	-0.014	T
BayesDel_noAF	Benign	-0.26
CADD	Benign	14
DANN	Benign	0.95
DEOGEN2	Benign	0.28	T
Eigen	Benign	-0.78
Eigen_PC	Benign	-0.88
FATHMM_MKL	Uncertain	0.87	D
LIST_S2	Benign	0.83	T
M_CAP	Uncertain	0.17	D
MetaRNN	Benign	0.36	T
MetaSVM	Benign	-0.29	T
MutationAssessor	Benign	1.1	L
PhyloP100		1.4
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-1.7	N
REVEL	Benign	0.26
Sift	Uncertain	0.016	D
Sift4G	Uncertain	0.018	D
Polyphen		0.10	B
Vest4		0.52
MutPred		0.33		Gain of catalytic residue at V781 (P = 0.0796)
MVP		0.49
MPC		0.29
ClinPred		0.23	T
GERP RS		-4.6
Varity_R		0.11
gMVP		0.74

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: rs771821923; hg19: chr16-2345664;