2-58163504-G-T

Variant names:

• chr2-58163504-G-T
• rs1553435677
• NM_018062.4:c.705C>A

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 2P and 3B. PM2 BP4_Moderate BP7

The NM_018062.4(FANCL):​c.705C>A​(p.Ser235Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000691 in 1,446,140 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S235S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: FANCL NM_018062.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.861
• Publications: 0 publications found

Genes affected

FANCL (HGNC:20748): (FA complementation group L) This gene encodes a ubiquitin ligase that is a member of the Fanconi anemia complementation group (FANC). Members of this group are related by their assembly into a common nuclear protein complex rather than by sequence similarity. This gene encodes the protein for complementation group L that mediates monoubiquitination of FANCD2 as well as FANCI. Fanconi anemia is a genetically heterogeneous recessive disorder characterized by cytogenetic instability, hypersensitivity to DNA crosslinking agents, increased chromosomal breakage, and defective DNA repair. Alternative splicing results in multiple transcript variants. [provided by RefSeq, May 2018]

VRK2 (HGNC:12719): (VRK serine/threonine kinase 2) This gene encodes a member of the vaccinia-related kinase (VRK) family of serine/threonine protein kinases. The encoded protein acts as an effector of signaling pathways that regulate apoptosis and tumor cell growth. Variants in this gene have been associated with schizophrenia. Alternative splicing results in multiple transcript variants that differ in their subcellular localization and biological activity. [provided by RefSeq, Jan 2014]

ACMG classification

Our verdict: Likely_benign. The variant received -1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (REVEL=0.166).
• BP7: Synonymous conserved (PhyloP=-0.861 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018062.4. 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
	FANCL	NM_018062.4	MANE Select	c.705C>A	p.Ser235Ser	synonymous	Exon 9 of 14	NP_060532.2
	FANCL	NM_001438889.1		c.750C>A	p.Ser250Ser	synonymous	Exon 10 of 14	NP_001425818.1
	FANCL	NM_001410792.1		c.765C>A	p.Ser255Ser	synonymous	Exon 10 of 15	NP_001397721.1	A0A8Q3SIK5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FANCL	ENST00000233741.9	TSL:1 MANE Select	c.705C>A	p.Ser235Ser	synonymous	Exon 9 of 14	ENSP00000233741.5	Q9NW38-1
	FANCL	ENST00000449070.6	TSL:1	c.528C>A	p.Ser176Ser	synonymous	Exon 6 of 11	ENSP00000401280.2	C9JZA9
	FANCL	ENST00000403295.8	TSL:1	c.692-430C>A		intron	N/A	ENSP00000386097.3	B5MC31

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.91e-7 AC: 1 AN: 1446140 Hom.: 0 Cov.: 28 AF XY: 0.00000139 AC XY: 1 AN XY: 720542

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR) AF: 0.00 AC: 0 AN: 33140

American (AMR) AF: 0.00 AC: 0 AN: 44566

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26010

East Asian (EAS) AF: 0.00 AC: 0 AN: 39538

South Asian (SAS) AF: 0.00 AC: 0 AN: 85884

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53346

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5744

European-Non Finnish (NFE) AF: 9.11e-7 AC: 1 AN: 1098038

Other (OTH) AF: 0.00 AC: 0 AN: 59874

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.54
CADD	Benign	6.7
DANN	Benign	0.76
PhyloP100		-0.86
Mutation Taster		=99/1	polymorphism

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: rs1553435677; hg19: chr2-58390639;