19-45765551-C-T

Position:

• chr19-45765551-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_175875.5(SIX5):​c.2170G>A​(p.Val724Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,118 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: SIX5 NM_175875.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.43

Genes affected

SIX5 (HGNC:10891): (SIX homeobox 5) The protein encoded by this gene is a homeodomain-containing transcription factor that appears to function in the regulation of organogenesis. This gene is located downstream of the dystrophia myotonica-protein kinase gene. Mutations in this gene are a cause of branchiootorenal syndrome type 2. [provided by RefSeq, Jul 2009]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14564046).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SIX5	NM_175875.5	c.2170G>A	p.Val724Ile	missense_variant	3/3	ENST00000317578.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SIX5	ENST00000317578.7	c.2170G>A	p.Val724Ile	missense_variant	3/3	1	NM_175875.5	P1
	ENST00000559756.1	n.767C>T		non_coding_transcript_exon_variant	1/2	3
SIX5	ENST00000560160.1	c.*380G>A		3_prime_UTR_variant	2/2	2
SIX5	ENST00000560168.1	c.*1596G>A		3_prime_UTR_variant	3/3	4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461118 Hom.: 0 Cov.: 29 AF XY: 0.00000138 AC XY: 1 AN XY: 726896

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 16, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with SIX5-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 724 of the SIX5 protein (p.Val724Ile). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.14
BayesDel_addAF	Benign	-0.077	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.077	T;T;T
Eigen	Benign	-0.22
Eigen_PC	Benign	-0.023
FATHMM_MKL	Uncertain	0.78	D
LIST_S2	Benign	0.78	.;T;T
M_CAP	Uncertain	0.098	D
MetaRNN	Benign	0.15	T;T;T
MetaSVM	Benign	-0.46	T
MutationAssessor	Benign	0.20	N;N;.
MutationTaster	Benign	0.80	N;N
PrimateAI	Uncertain	0.75	T
PROVEAN	Benign	-0.11	.;N;.
REVEL	Benign	0.24
Sift	Benign	0.24	.;T;.
Sift4G	Benign	0.90	.;T;D
Polyphen		0.13	B;B;.
Vest4		0.35, 0.11
MutPred		0.21		Loss of ubiquitination at K723 (P = 0.0828);Loss of ubiquitination at K723 (P = 0.0828);.;
MVP		0.93
MPC		0.28
ClinPred		0.45	T
GERP RS		4.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.072
gMVP		0.072

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr19-46268809;