Genetic Variant NM_005413.4:c.42C>G (chr2-44942146-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_005413.4(SIX3):c.42C>G(p.Phe14Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000000691 in 1,446,286 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. F14C) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 6.9e-7 ( 0 hom. )

Consequence

SIX3
NM_005413.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.91

Publications

0 publications found

Variant links:

Genes affected

SIX3 (HGNC:10889): (SIX homeobox 3) This gene encodes a member of the sine oculis homeobox transcription factor family. The encoded protein plays a role in eye development. Mutations in this gene have been associated with holoprosencephaly type 2. [provided by RefSeq, Oct 2009]

SIX3 links:

ENSG00000225156 (HGNC:):

ENSG00000225156 links:

SIX3-AS1 (HGNC:40532): (SIX3 antisense RNA 1)

SIX3-AS1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

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

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SIX3	NM_005413.4 link	c.42C>G	p.Phe14Leu	missense_variant	Exon 1 of 2	ENST00000260653.5	NP_005404.1	O95343

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SIX3	ENST00000260653.5 link	c.42C>G	p.Phe14Leu	missense_variant	Exon 1 of 2	1	NM_005413.4	ENSP00000260653.3		O95343

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000426

AC:

AN:

234556

AF XY:

0.00000779

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000565

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.91e-7

AC:

AN:

1446286

Hom.:

Cov.:

AF XY:

0.00000139

AC XY:

AN XY:

719902

show subpopulations

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

African (AFR)

AF:

0.00

AC:

AN:

33428

American (AMR)

AF:

0.00

AC:

AN:

44694

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26102

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39650

South Asian (SAS)

AF:

0.00

AC:

AN:

86228

European-Finnish (FIN)

AF:

0.00

AC:

AN:

39108

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5382

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111496

Other (OTH)

AF:

0.00

AC:

AN:

60198

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.55

BayesDel_addAF

Benign

-0.0068

BayesDel_noAF

Uncertain

-0.080

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.18

Eigen

Benign

-0.17

Eigen_PC

Benign

-0.090

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.74

M_CAP

Pathogenic

0.45

MetaRNN

Uncertain

0.45

MetaSVM

Uncertain

-0.13

MutationAssessor

Benign

-0.55

PhyloP100

3.9

PrimateAI

Uncertain

0.79

PROVEAN

Benign

0.0

REVEL

Uncertain

0.44

Sift

Benign

0.36

Sift4G

Benign

0.37

Polyphen

0.92

Vest4

0.42

MutPred

0.23

Gain of disorder (P = 0.1036);

MVP

0.95

MPC

1.2

ClinPred

0.38

GERP RS

2.7

PromoterAI

-0.015

Neutral

(source)

Varity_R

0.21

gMVP

0.79

Mutation Taster

=60/40

polymorphism

(source)

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

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over