chr11-66838438-C-T

Variant names:

• chr11-66838438-C-T
• rs79814172
• NM_001302084.2:c.1242C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Moderate BP6 BP7 BS1 BS2

The NM_001302084.2(TOP6BL):​c.1242C>T​(p.Leu414Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0017 in 1,613,690 control chromosomes in the GnomAD database, including 43 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (no stars).

• Frequency:
  • Genomes: 𝑓 0.0089 (23 hom., cov: 32)
  • Exomes 𝑓: 0.00095 (20 hom.)
• Consequence: TOP6BL NM_001302084.2 synonymous
• Clinical Significance: Benign no assertion criteria provided B:1
• Conservation: PhyloP100: 0.0190
• Publications: 2 publications found

Genes affected

TOP6BL (HGNC:26197): (TOP6B like initiator of meiotic double strand breaks) Predicted to be involved in meiotic DNA double-strand break formation and reciprocal meiotic recombination. Predicted to be located in chromosome. Implicated in gestational trophoblastic neoplasm. [provided by Alliance of Genome Resources, Apr 2022]

TOP6BL Gene-Disease associations (from GenCC):

• hydatidiform mole, recurrent, 4

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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (REVEL=0.037).
• BP6: Variant 11-66838438-C-T is Benign according to our data. Variant chr11-66838438-C-T is described in ClinVar as Benign. ClinVar VariationId is 3049948.Status of the report is no_assertion_criteria_provided, 0 stars.
• BP7: Synonymous conserved (PhyloP=0.019 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00887 (1351/152272) while in subpopulation AFR AF = 0.0302 (1257/41554). AF 95% confidence interval is 0.0289. There are 23 homozygotes in GnomAd4. There are 614 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.
• BS2: High Homozygotes in GnomAd4 at 23 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001302084.2. 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
	TOP6BL	NM_001302084.2	MANE Select	c.1242C>T	p.Leu414Leu	synonymous	Exon 13 of 15	NP_001289013.1	Q8N6T0-6
	TOP6BL	NM_024650.4		c.1593C>T	p.Leu531Leu	synonymous	Exon 15 of 17	NP_078926.4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TOP6BL	ENST00000540737.7	TSL:2 MANE Select	c.1242C>T	p.Leu414Leu	synonymous	Exon 13 of 15	ENSP00000444319.1	Q8N6T0-6
	TOP6BL	ENST00000525449.6	TSL:1	c.1164C>T	p.Leu388Leu	synonymous	Exon 13 of 15	ENSP00000434648.2	A0A140TA08
	TOP6BL	ENST00000525908.6	TSL:2	c.1593C>T	p.Leu531Leu	synonymous	Exon 15 of 17	ENSP00000432039.3	A0A2U3TZP7

Frequencies

GnomAD3 genomes AF: 0.00886 AC: 1348 AN: 152154 Hom.: 23 Cov.: 32

Gnomad AFR AF: 0.0303

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00452

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000132

Gnomad OTH AF: 0.00767

GnomAD2 exomes AF: 0.00238 AC: 594 AN: 249088 AF XY: 0.00164

Gnomad AFR exome AF: 0.0324

Gnomad AMR exome AF: 0.00209

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000115

Gnomad OTH exome AF: 0.000827

GnomAD4 exome AF: 0.000950 AC: 1388 AN: 1461418 Hom.: 20 Cov.: 30 AF XY: 0.000795 AC XY: 578 AN XY: 727002

African (AFR) AF: 0.0321 AC: 1075 AN: 33474

American (AMR) AF: 0.00212 AC: 95 AN: 44714

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26114

East Asian (EAS) AF: 0.00 AC: 0 AN: 39696

South Asian (SAS) AF: 0.0000928 AC: 8 AN: 86244

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53316

Middle Eastern (MID) AF: 0.00121 AC: 7 AN: 5768

European-Non Finnish (NFE) AF: 0.0000693 AC: 77 AN: 1111728

Other (OTH) AF: 0.00209 AC: 126 AN: 60364

GnomAD4 genome AF: 0.00887 AC: 1351 AN: 152272 Hom.: 23 Cov.: 32 AF XY: 0.00824 AC XY: 614 AN XY: 74472

African (AFR) AF: 0.0302 AC: 1257 AN: 41554

American (AMR) AF: 0.00451 AC: 69 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5190

South Asian (SAS) AF: 0.00 AC: 0 AN: 4828

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10624

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

European-Non Finnish (NFE) AF: 0.000132 AC: 9 AN: 67996

Other (OTH) AF: 0.00759 AC: 16 AN: 2108

Alfa AF: 0.00419 Hom.: 7

Bravo AF: 0.0112

Asia WGS AF: 0.00115 AC: 4 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Benign

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	-	1	TOP6BL-related disorder (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.76
CADD	Benign	0.91
DANN	Benign	0.61
PhyloP100		0.019
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=100/0	polymorphism

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: rs79814172; hg19: chr11-66605909;