19-45364274-C-G

Variant names:

• chr19-45364274-C-G
• rs370454709
• NM_000400.4:c.776G>C

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PM5

The NM_000400.4(ERCC2):​c.776G>C​(p.Cys259Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. C259Y) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ERCC2 NM_000400.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.10
• 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: Illumina, Labcorp Genetics (formerly Invitae), G2P, Genomics England PanelApp
• xeroderma pigmentosum group D

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-45364274-C-T is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 329522.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ERCC2	NM_000400.4	c.776G>C	p.Cys259Ser	missense_variant	Exon 9 of 23	ENST00000391945.10	NP_000391.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ERCC2	ENST00000391945.10	c.776G>C	p.Cys259Ser	missense_variant	Exon 9 of 23	1	NM_000400.4	ENSP00000375809.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 37

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Pathogenic	0.27	D
BayesDel_noAF	Pathogenic	0.14
CADD	Benign	22
DANN	Benign	0.96
DEOGEN2	Benign	0.14	T;T;T;.;.
Eigen	Benign	-0.12
Eigen_PC	Benign	0.092
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.90	D;D;D;D;D
M_CAP	Uncertain	0.089	D
MetaRNN	Uncertain	0.67	D;D;D;D;D
MetaSVM	Benign	-0.59	T
MutationAssessor	Benign	0.28	N;.;.;.;.
PhyloP100		5.1
PrimateAI	Pathogenic	0.82	D
PROVEAN	Benign	-0.65	N;N;.;N;.
REVEL	Uncertain	0.36
Sift	Benign	0.15	T;T;.;T;.
Sift4G	Benign	0.11	T;T;T;T;.
Polyphen		0.0010	B;B;.;.;.
Vest4		0.47
MutPred		0.63		Gain of disorder (P = 0.003);.;.;.;.;
MVP		0.90
MPC		0.26
ClinPred		0.81	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.57
gMVP		0.71
Mutation Taster		=12/88	disease causing

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: rs370454709; hg19: chr19-45867532;