3-181712607-TCG-CTT

Variant names:

• chr3-181712607-TCG-CTT
• NM_003106.4:c.247_249delTCGinsCTT
• SOX2 p.Ser83Leu

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM1

The NM_003106.4(SOX2):​c.247_249delTCGinsCTT​(p.Ser83Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SOX2 NM_003106.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.95
• Publications: 0 publications found

Genes affected

SOX2 (HGNC:11195): (SRY-box transcription factor 2) This intronless gene encodes a member of the SRY-related HMG-box (SOX) family of transcription factors involved in the regulation of embryonic development and in the determination of cell fate. The product of this gene is required for stem-cell maintenance in the central nervous system, and also regulates gene expression in the stomach. Mutations in this gene have been associated with optic nerve hypoplasia and with syndromic microphthalmia, a severe form of structural eye malformation. This gene lies within an intron of another gene called SOX2 overlapping transcript (SOX2OT). [provided by RefSeq, Jul 2008]

SOX2-OT (HGNC:20209): (SOX2 overlapping transcript) This gene produces alternatively spliced long non-coding RNAs. These RNAs were observed to be upregulated in tumor cells and positively correlated to expression of the SRY-box 2 gene. Overexpression of these transcripts may promote cell proliferation. [provided by RefSeq, Dec 2017]

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM1: In a DNA_binding_region HMG box (size 68) in uniprot entity SOX2_HUMAN there are 14 pathogenic changes around while only 2 benign (88%) in NM_003106.4

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003106.4. 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
	SOX2	NM_003106.4	MANE Select	c.247_249delTCGinsCTT	p.Ser83Leu	missense	N/A	NP_003097.1	P48431
	SOX2-OT	NR_004053.3		n.768-2578_768-2576delTCGinsCTT		intron	N/A
	SOX2-OT	NR_075089.1		n.767+12724_767+12726delTCGinsCTT		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SOX2	ENST00000325404.3	TSL:6 MANE Select	c.247_249delTCGinsCTT	p.Ser83Leu	missense	N/A	ENSP00000323588.1	P48431
	SOX2-OT	ENST00000466034.7	TSL:1	n.349+12724_349+12726delTCGinsCTT		intron	N/A
	SOX2-OT	ENST00000476964.6	TSL:1	n.482-26962_482-26960delTCGinsCTT		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.0

Splicing

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: chr3-181430395;