9-137008570-G-A

Variant names:

• chr9-137008570-G-A
• rs377043863
• NM_001606.5:c.7121C>T

Variant summary

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

The NM_001606.5(ABCA2):​c.7121C>T​(p.Thr2374Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000172 in 1,456,776 control chromosomes in the GnomAD database, with no homozygous occurrence. 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)
  • Exomes 𝑓: 0.000017 (0 hom.)
• Consequence: ABCA2 NM_001606.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.27
• Publications: 0 publications found

Genes affected

ABCA2 (HGNC:32): (ATP binding cassette subfamily A member 2) 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. This protein is highly expressed in brain tissue and may play a role in macrophage lipid metabolism and neural development. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jul 2008]

ABCA2 Gene-Disease associations (from GenCC):

• intellectual developmental disorder with poor growth and with or without seizures or ataxia

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• schizophrenia

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

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=0.18762216).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCA2	NM_001606.5	c.7121C>T	p.Thr2374Met	missense_variant	Exon 48 of 49	ENST00000341511.11	NP_001597.2
ABCA2	NM_212533.3	c.7211C>T	p.Thr2404Met	missense_variant	Exon 48 of 49		NP_997698.1
ABCA2	NM_001411042.1	c.7118C>T	p.Thr2373Met	missense_variant	Exon 47 of 48		NP_001397971.1
ABCA2	XM_047422921.1	c.7208C>T	p.Thr2403Met	missense_variant	Exon 47 of 48		XP_047278877.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCA2	ENST00000341511.11	c.7121C>T	p.Thr2374Met	missense_variant	Exon 48 of 49	5	NM_001606.5	ENSP00000344155.6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000418 AC: 1 AN: 239042 AF XY: 0.00

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: 0.00000925

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000172 AC: 25 AN: 1456776 Hom.: 0 Cov.: 42 AF XY: 0.0000152 AC XY: 11 AN XY: 724184

African (AFR) AF: 0.00 AC: 0 AN: 33428

American (AMR) AF: 0.00 AC: 0 AN: 44358

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26042

East Asian (EAS) AF: 0.0000253 AC: 1 AN: 39558

South Asian (SAS) AF: 0.00 AC: 0 AN: 85338

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 51684

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.0000207 AC: 23 AN: 1110400

Other (OTH) AF: 0.0000166 AC: 1 AN: 60204

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ESP6500AA AF: 0.000242 AC: 1

ESP6500EA AF: 0.00 AC: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Mar 17, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.7211C>T (p.T2404M) alteration is located in exon 48 (coding exon 48) of the ABCA2 gene. This alteration results from a C to T substitution at nucleotide position 7211, causing the threonine (T) at amino acid position 2404 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.077
BayesDel_addAF	Benign	-0.033	T
BayesDel_noAF	Benign	-0.29
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.29	.;T;T;.;T
Eigen	Benign	-0.15
Eigen_PC	Benign	-0.13
FATHMM_MKL	Benign	0.40	N
LIST_S2	Uncertain	0.91	D;D;D;D;D
M_CAP	Uncertain	0.17	D
MetaRNN	Benign	0.19	T;T;T;T;T
MetaSVM	Benign	-0.37	T
MutationAssessor	Benign	1.1	.;L;.;.;.
PhyloP100		1.3
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	-0.41	N;N;N;.;N
REVEL	Uncertain	0.29
Sift	Benign	0.060	T;T;T;.;D
Sift4G	Uncertain	0.023	D;D;D;D;D
Polyphen		0.71	.;P;.;.;.
Vest4		0.29
MVP		0.56
MPC		0.76
ClinPred		0.45	T
GERP RS		4.2
Varity_R		0.064
gMVP		0.14
Mutation Taster		=92/8	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: rs377043863; hg19: chr9-139903022;