chr2-17755897-T-G

Variant names:

• chr2-17755897-T-G
• rs551170881
• NM_001130009.3:c.-16+1552T>G

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_Moderate BP6 BS2

The NM_001130009.3(GEN1):​c.-16+1552T>G variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000512 in 152,352 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (no stars).

• Frequency:
  • Genomes: 𝑓 0.00051 (1 hom., cov: 33)
  • Failed GnomAD Quality Control
• Consequence: GEN1 NM_001130009.3 intron
• Clinical Significance: Likely benign no assertion criteria provided B:1
• Conservation: PhyloP100: 2.32
• Publications: 0 publications found

Genes affected

GEN1 (HGNC:26881): (GEN1 Holliday junction 5' flap endonuclease) This gene encodes a member of the Rad2/xeroderma pigmentosum group G nuclease family, whose members are characterized by N-terminal and internal xeroderma pigmentosum group G nuclease domains followed by helix-hairpin-helix domains and disordered C-terminal domains. The protein encoded by this gene is involved in resolution of Holliday junctions, which are intermediate four-way structures that covalently link DNA during homologous recombination and double-strand break repair. The protein resolves Holliday junctions by creating dual incisions across the junction to produce nicked duplex products that can be ligated. In addition, this protein has been found to localize to centrosomes where it has been implicated in regulation of centrosome integrity. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2016]

SMC6 (HGNC:20466): (structural maintenance of chromosomes 6) Enables ubiquitin protein ligase binding activity. Involved in several processes, including cellular senescence; positive regulation of chromosome segregation; and telomere maintenance via recombination. Located in chromosome and nuclear body. Part of Smc5-Smc6 complex. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Benign. The variant received -7 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.29).
• BP6: Variant 2-17755897-T-G is Benign according to our data. Variant chr2-17755897-T-G is described in ClinVar as Likely_benign. ClinVar VariationId is 223806.Status of the report is no_assertion_criteria_provided, 0 stars.
• BS2: High AC in GnomAd4 at 78 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001130009.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GEN1	NM_001130009.3	MANE Select	c.-16+1552T>G		intron	N/A	NP_001123481.3	Q17RS7
	GEN1	NM_182625.5		c.-16+1930T>G		intron	N/A	NP_872431.5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GEN1	ENST00000381254.7	TSL:5 MANE Select	c.-16+1552T>G		intron	N/A	ENSP00000370653.2	Q17RS7
	SMC6	ENST00000402989.5	TSL:2	c.-5-9946A>C		intron	N/A	ENSP00000384539.1	Q96SB8-1
	SMC6	ENST00000960848.1		c.-5-9946A>C		intron	N/A	ENSP00000630907.1

Frequencies

GnomAD3 genomes AF: 0.000512 AC: 78 AN: 152234 Hom.: 1 Cov.: 33

Gnomad AFR AF: 0.0000723

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000785

Gnomad ASJ AF: 0.00375

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00331

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000470

Gnomad OTH AF: 0.000955

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.000512 AC: 78 AN: 152352 Hom.: 1 Cov.: 33 AF XY: 0.000470 AC XY: 35 AN XY: 74508

African (AFR) AF: 0.0000721 AC: 3 AN: 41590

American (AMR) AF: 0.000784 AC: 12 AN: 15302

Ashkenazi Jewish (ASJ) AF: 0.00375 AC: 13 AN: 3470

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.00331 AC: 16 AN: 4832

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.000470 AC: 32 AN: 68020

Other (OTH) AF: 0.000945 AC: 2 AN: 2116

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.000642

Asia WGS AF: 0.000578 AC: 2 AN: 3472

ClinVar

ClinVar submissions as Germline

Significance: Likely benign

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	-	1	Hereditary cancer-predisposing syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.29
CADD	Benign	18
DANN	Benign	0.88
PhyloP100		2.3

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: rs551170881; hg19: chr2-17937164;