14-28767768-C-G

Variant names:

• chr14-28767768-C-G
• rs375378714
• NM_005249.5:c.489C>G

Variant summary

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

The NM_005249.5(FOXG1):​c.489C>G​(p.Gly163Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000707 in 1,414,872 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. G163G) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 7.1e-7 (0 hom.)
• Consequence: FOXG1 NM_005249.5 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.60
• Publications: 0 publications found

Genes affected

FOXG1 (HGNC:3811): (forkhead box G1) This locus encodes a member of the fork-head transcription factor family. The encoded protein, which functions as a transcriptional repressor, is highly expressed in neural tissues during brain development. Mutations at this locus have been associated with Rett syndrome and a diverse spectrum of neurodevelopmental disorders defined as part of the FOXG1 syndrome. This gene is disregulated in many types of cancer and is the target of multiple microRNAs that regulate the proliferation of tumor cells. [provided by RefSeq, Jul 2020]

LINC01551 (HGNC:19828): (long intergenic non-protein coding RNA 1551)

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 (BayesDel_noAF=-0.42).
• BP7: Synonymous conserved (PhyloP=1.6 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005249.5. 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
	FOXG1	NM_005249.5	MANE Select	c.489C>G	p.Gly163Gly	synonymous	Exon 1 of 1	NP_005240.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FOXG1	ENST00000313071.7	TSL:6 MANE Select	c.489C>G	p.Gly163Gly	synonymous	Exon 1 of 1	ENSP00000339004.3	P55316
	FOXG1	ENST00000706482.1		c.489C>G	p.Gly163Gly	synonymous	Exon 2 of 2	ENSP00000516406.1	P55316
	LINC01551	ENST00000675861.1		n.374+1755C>G		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 7.07e-7 AC: 1 AN: 1414872 Hom.: 0 Cov.: 37 AF XY: 0.00000142 AC XY: 1 AN XY: 701940

⚠️ 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: 32748

American (AMR) AF: 0.00 AC: 0 AN: 42750

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25690

East Asian (EAS) AF: 0.00 AC: 0 AN: 38802

South Asian (SAS) AF: 0.00 AC: 0 AN: 83600

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 40782

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4850

European-Non Finnish (NFE) AF: 9.20e-7 AC: 1 AN: 1086774

Other (OTH) AF: 0.00 AC: 0 AN: 58876

⚠️ 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	-0.42
CADD	Benign	14
DANN	Benign	0.96
PhyloP100		1.6

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: rs375378714; hg19: chr14-29236974;