chr14-60648856-G-A

Position:

• chr14-60648856-G-A

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PM1 PM2 PM5 PP3_Strong

The NM_005982.4(SIX1):​c.334C>T​(p.Arg112Cys) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as not provided (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R112G) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SIX1 NM_005982.4 missense
• Clinical Significance: not provided no classification provided O:1
• Conservation: PhyloP100: 4.01

Genes affected

SIX1 (HGNC:10887): (SIX homeobox 1) The protein encoded by this gene is a homeobox protein that is similar to the Drosophila 'sine oculis' gene product. This gene is found in a cluster of related genes on chromosome 14 and is thought to be involved in limb development. Defects in this gene are a cause of autosomal dominant deafness type 23 (DFNA23) and branchiootic syndrome type 3 (BOS3). [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 6 uncertain in NM_005982.4
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr14-60648856-G-C is described in Lovd as [Likely_pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.973

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SIX1	NM_005982.4	c.334C>T	p.Arg112Cys	missense_variant	1/2	ENST00000645694.3
SIX1	XM_017021602.3	c.334C>T	p.Arg112Cys	missense_variant	1/2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SIX1	ENST00000645694.3	c.334C>T	p.Arg112Cys	missense_variant	1/2		NM_005982.4	P1
SIX1	ENST00000554986.2	c.42-2279C>T		intron_variant		3
SIX1	ENST00000553535.2	n.249-2279C>T		intron_variant, non_coding_transcript_variant		3
SIX1	ENST00000555955.3	n.1198-2279C>T		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

Submissions by phenotype

Branchiootic syndrome 3 Other:1

not provided, no classification provided

literature only

GeneReviews

-

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.43
CADD	Pathogenic	34
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.99	D;D
Eigen	Pathogenic	0.93
Eigen_PC	Pathogenic	0.83
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	1.0	.;D
M_CAP	Pathogenic	0.37	D
MetaRNN	Pathogenic	0.97	D;D
MetaSVM	Pathogenic	0.99	D
MutationAssessor	Pathogenic	3.7	H;H
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.93	D
PROVEAN	Pathogenic	-7.7	D;.
REVEL	Pathogenic	0.84
Sift	Pathogenic	0.0	D;.
Sift4G	Pathogenic	0.0	D;.
Polyphen		1.0	D;D
Vest4		0.90
MutPred		0.87		Loss of MoRF binding (P = 0.0181);Loss of MoRF binding (P = 0.0181);
MVP		0.98
MPC		2.7
ClinPred		1.0	D
GERP RS		4.9
Varity_R		0.94
gMVP		0.89

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

LitVar

Other links and lift over

dbSNP: rs397515561; hg19: chr14-61115574; COSMIC: COSV55959493; COSMIC: COSV55959493;