2-44944585-TT-CA

Variant names:

• chr2-44944585-TT-CA
• NM_005413.4:c.824_825delTTinsCA
• SIX3 p.Ile275Thr

Variant summary

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

The NM_005413.4(SIX3):​c.824_825delTTinsCA​(p.Ile275Thr) 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. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely benign in ClinVar.

• Frequency: Genomes: not found (cov: 33)
• Consequence: SIX3 NM_005413.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.56
• Publications: 0 publications found

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

ENSG00000225156 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005413.4. 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
	SIX3	NM_005413.4	MANE Select	c.824_825delTTinsCA	p.Ile275Thr	missense	N/A	NP_005404.1	O95343

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SIX3	ENST00000260653.5	TSL:1 MANE Select	c.824_825delTTinsCA	p.Ile275Thr	missense	N/A	ENSP00000260653.3	O95343
	SIX3-AS1	ENST00000760561.1		n.166_167delAAinsTG		non_coding_transcript_exon	Exon 1 of 2
	ENSG00000225156	ENST00000760330.1		n.135+10209_135+10210delTTinsCA		intron	N/A

Frequencies

GnomAD3 genomes Cov.: 33

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

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		5.6

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: chr2-45171724;