19-45365051-T-A

Variant names:

• chr19-45365051-T-A
• NM_000400.4:c.468A>T
• ERCC2 p.Arg156Arg

GermlineCancer (beta)

Variant summary

Our verdict is Likely benign.

-2 Likely Benign

-7

-6

-1

0

+5

+6

+9

+10

BenignB

Likely BenignLB

UncertainVUS

Likely PathogenicLP

PathogenicP

The variant received -2 classification points (ACGS-UK Somatic Oncogenicity v2025): 2P and 4B. O3_ModerateB4_Strong

The NM_000400.4(ERCC2):c.468A>T (p.Arg156Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The gene ERCC2 is a tumor suppressor gene (CancerMine: 3 TSG, 2 oncogene citations). The gene ERCC2 is a known oncogene (CancerMine: 3 TSG, 2 oncogene citations). The variant is absent from the gnomAD population database at sites with sufficient sequencing coverage. In-silico predictor (BayesDel (noAF)) classifies this variant as likely benign. Splicing prediction tools (SpliceAI) predict no significant impact on normal splicing. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ERCC2 NM_000400.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.83
• Publications: 0 publications found

Genes affected

ERCC2 (HGNC:3434): (ERCC excision repair 2, TFIIH core complex helicase subunit) The nucleotide excision repair pathway is a mechanism to repair damage to DNA. The protein encoded by this gene is involved in transcription-coupled nucleotide excision repair and is an integral member of the basal transcription factor BTF2/TFIIH complex. The gene product has ATP-dependent DNA helicase activity and belongs to the RAD3/XPD subfamily of helicases. Defects in this gene can result in three different disorders, the cancer-prone syndrome xeroderma pigmentosum complementation group D, trichothiodystrophy, and Cockayne syndrome. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Aug 2008]

ERCC2 Gene-Disease associations (from GenCC):

• cerebrooculofacioskeletal syndrome 2

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• trichothiodystrophy 1, photosensitive

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Illumina, Genomics England PanelApp, G2P
• xeroderma pigmentosum group D

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Genomics England PanelApp, PanelApp Australia, G2P, ClinGen
• sarcoma

  Inheritance: AR Classification: MODERATE Submitted by: Genomics England PanelApp
• COFS syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• trichothiodystrophy

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• xeroderma pigmentosum

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• xeroderma pigmentosum-Cockayne syndrome complex

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

Classification according to ACGS-UK Somatic Oncogenicity v2025

Our verdict: Likely_benign. The variant received -2 points.

• O3: Absent or extremely rare in gnomAD (AC ≤ 2) — O3 moderate; GnomAD: AF = absent, AC = 0 — absent/extremely rare (O3 moderate [+2])
• B4: Synonymous/intronic variant with confirmed no splicing impact (B4 strong); Synonymous variant — splicing algorithms confirm no impact on splicing (B4 strong [-4])

Variant Effect in Transcripts

Automated classification analysis was done for transcript: NM_000400.4. 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
	ERCC2	NM_000400.4	MANE Select	c.468A>T	p.Arg156Arg	synonymous	Exon 6 of 23	NP_000391.1	P18074-1
	ERCC2	NM_001440355.1		c.396A>T	p.Arg132Arg	synonymous	Exon 6 of 23	NP_001427284.1
	ERCC2	NM_001440356.1		c.390A>T	p.Arg130Arg	synonymous	Exon 5 of 22	NP_001427285.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ERCC2	ENST00000391945.10	TSL:1 MANE Select	c.468A>T	p.Arg156Arg	synonymous	Exon 6 of 23	ENSP00000375809.4	P18074-1
	ERCC2	ENST00000391944.8	TSL:1	c.468A>T	p.Arg156Arg	synonymous	Exon 6 of 22	ENSP00000375808.4	E7EVE9
	ERCC2	ENST00000391941.6	TSL:1	c.396A>T	p.Arg132Arg	synonymous	Exon 5 of 21	ENSP00000375805.2	A8MX75

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 37

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.40
CADD	Benign	10
DANN	Benign	0.70
PhyloP100		1.8

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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.

Other links and lift over

hg19: chr19-45868309;

ACMG debug oncogenicity

ACGS debug oncogenicity

ACMG debug germline

Submit to ClinVar