NM_005502.4:c.161-806C>T

Variant names:

• chr9-104885374-G-A
• rs3890182
• NM_005502.4:c.161-806C>T

GermlineCancer (beta)

Variant summary

Our verdict is Likely benign.

-4 Likely Benign

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received -4 classification points (ACGS-UK Somatic Oncogenicity v2025). B1_Strong

The NM_005502.4(ABCA1):c.161-806C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The gene ABCA1 is a tumor suppressor gene (CancerMine: 2 TSG, 1 oncogene, 1 driver citations). The gene ABCA1 is a known oncogene (CancerMine: 2 TSG, 1 oncogene, 1 driver citations). The gene ABCA1 is a cancer driver gene (CancerMine: 2 TSG, 1 oncogene, 1 driver citations). The variant allele was found at a cumulative frequency of 0.115 (AC=17,571) in the gnomAD database across 152,134 control chromosomes, including 1,081 homozygotes. The grpmax filtering allele frequency (95% CI) is 0.12. In-silico predictor (BayesDel (noAF)) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign/Likely Benign (no review stars).

• Frequency: Genomes: 𝑓 0.12 (1081 hom., cov: 32)
• Consequence: ABCA1 NM_005502.4 intron
• Clinical Significance: Benign no assertion criteria provided B:1
• Conservation: PhyloP100: 0.173
• Publications: 84 publications found

Genes affected

ABCA1 (HGNC:29): (ATP binding cassette subfamily A member 1) 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. With cholesterol as its substrate, this protein functions as a cholesteral efflux pump in the cellular lipid removal pathway. Mutations in both alleles of this gene cause Tangier disease and familial high-density lipoprotein (HDL) deficiency. [provided by RefSeq, Sep 2019]

ABCA1 Gene-Disease associations (from GenCC):

• hypoalphalipoproteinemia, primary, 1

  Inheritance: AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: PanelApp Australia, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• Tangier disease

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, G2P, PanelApp Australia
• apolipoprotein A-I deficiency

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

Classification according to ACGS-UK Somatic Oncogenicity v2025

Classification was made for transcript:

Our verdict: Likely_benign. The variant received -4 points.

Apply	Criterion Code & Title / Strength	Strength	Rationale / Clinical Context
	B1High frequency in general population		GnomAD effective popmax AF >1% — B1 stand-alone benign; GnomAD effective popmax AF = 0.12 — exceeds 1% threshold (B1 applied)

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_005502.4. You can select a different transcript below to see updated classification assignments.

RefSeq Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	ABCA1 NM_005502.4	MANE Select	c.161-806C>T	intron	Intron 3 of 49	Prot: NP_005493.2

ABCA1 NM_005502.4

MANE Select

HGVSc / HGVSpc.161-806C>T

Exon rankIntron 3 of 49

intron

Prot: NP_005493.2

Ensembl Transcripts

Sel.	Gene / Transcript	Tags	HGVSc / HGVSp	Effect	Exon rank	Protein / UniProt
	ABCA1 ENST00000374736.8	TSL:1MANE Select	c.161-806C>T	intron	Intron 3 of 49	Prot: ENSP00000363868.3 UniProt:
	ABCA1 ENST00000678995.1		c.161-806C>T	intron	Intron 3 of 49	Prot: ENSP00000504612.1 UniProt:
	ABCA1 ENST00000423487.6	TSL:2	c.161-806C>T	intron	Intron 3 of 7	Prot: ENSP00000416623.2 UniProt:

ABCA1 ENST00000374736.8

TSL:1MANE Select

HGVSc / HGVSpc.161-806C>T

Exon rankIntron 3 of 49

intron

Prot: ENSP00000363868.3UniProt: O95477

ABCA1 ENST00000678995.1

HGVSc / HGVSpc.161-806C>T

Exon rankIntron 3 of 49

intron

Prot: ENSP00000504612.1UniProt: A0A7I2V5U0

ABCA1 ENST00000423487.6

TSL:2

HGVSc / HGVSpc.161-806C>T

Exon rankIntron 3 of 7

intron

Prot: ENSP00000416623.2UniProt: B1AMI2

Frequencies

Allele frequencies (AF), counts (AC/AN), homozygotes and coverage

Common (AF > 0.05 / Hom > 5)

Rare (AF ≤ 0.0001 / Hom ≤ 1)

Source / population	AF	AC	Hom	AN	Coverage
Global population databases 4 sources Large-scale international reference populations
GnomAD3 genomes	AF: 0.116	AC:17561	Hom:1080	AN:152016	Cov:32
GnomAD4 genome	AF: 0.115	AC:17571	Hom:1081	AN:152134	Cov:32
TOPMed (Bravo)	AF: 0.117	AC:	Hom:	AN:	Cov:
ALFA (dbGaP/dbSNP Allele Frequency Aggregator)	AF: 0.117	AC:78379	Hom:4799	AN:670240	Cov:
Local & regional cohorts 10 sources Population-specific and national genomic databases
ABraOM SABE-WGS-1171	AF: 0.129	AC:301	Hom:21	AN:2342	Cov:
ChinaMAP Phase 1	AF: 0.0624	AC:	Hom:	AN:	Cov:
Denmark Genome	AF: 0.110	AC:33	Hom:	AN:300	Cov:
GenomeAsia100K	AF: 0.111	AC:387	Hom:	AN:3478	Cov:
Korea4K (4,157 Koreans)	AF: 0.0510	AC:366	Hom:	AN:7234	Cov:
Qatari Genome	AF: 0.199	AC:35	Hom:	AN:176	Cov:
ToMMo 61KJPN (+60KJPN MNV)	AF: 0.0637	AC:7820	Hom:270	AN:122798	Cov:
Turkish Variome	AF: 0.107	AC:165	Hom:12	AN:1546	Cov:
UK10K	AF: 0.121	AC:912	Hom:	AN:7562	Cov:
WBBC (Westlake BioBank for Chinese) pilot	AF: 0.0655	AC:587	Hom:21	AN:8960	Cov:

Showing 14 sources

Tested, but no data found:GnomAD4 exomeIf GnomAD4 is missing, the position is probably not covered by the project.

ClinVar

ClinVar submissions

Significance: Benign

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	-	1	RECLASSIFIED - ABCA1 POLYMORPHISM (1)

Computational Scores

Algorithm	Calibrated pred.	Score	Prediction
AlphaGenome AVI	Benign	9.2
BayesDel_noAF	Benign	-0.87
CADD	Benign	3.2
DANN	Benign	0.42
GPN-Star LLR	N/A	0.44
GPN-Star score	N/A	-0.44
Mutation Taster	N/A	100/0	polymorphism (auto)
PhyloP100	Benign	0.17

Showing 8 of 8 scores

Splicing Scores

Algorithm	Calibrated pred.	Score	Prediction
Pangolin (max)	Benign	0.0
SpliceAI score (max)	Benign	0.0	Details are displayed if max score is > 0.2

Showing 2 of 2 scores

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

MaveDB functional evidence

MaveDB is a public repository of laboratory assays that test the effect of thousands of variants at once — treat this as supporting research data and interpret it with great caution; it is not a clinical classification.

No MaveDB functional evidence found for this variant.

Other links and lift over

dbSNP: rs3890182;

hg19: chr9-107647655;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar