6-31967790-G-T

Position:

• chr6-31967790-G-T

Variant summary

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

The NM_006929.5(SKIC2):​c.2659G>T​(p.Asp887Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. 13/21 in silico tools predict a benign outcome for this variant. 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. D887N) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: SKIC2 NM_006929.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.420

Genes affected

SKIC2 (HGNC:10898): (SKI2 subunit of superkiller complex) DEAD box proteins, characterized by the conserved motif Asp-Glu-Ala-Asp (DEAD), are putative RNA helicases. They are implicated in a number of cellular processes involving alteration of RNA secondary structure such as translation initiation, nuclear and mitochondrial splicing, and ribosome and spliceosome assembly. Based on their distribution patterns, some members of this family are believed to be involved in embryogenesis, spermatogenesis, and cellular growth and division. This gene encodes a DEAD box protein, which is a human homologue of yeast SKI2 and may be involved in antiviral activity by blocking translation of poly(A) deficient mRNAs. This gene is located in the class III region of the major histocompatibility complex. [provided by RefSeq, Jul 2008]

SKIC2 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SKIC2	NM_006929.5	c.2659G>T	p.Asp887Tyr	missense_variant	22/28	ENST00000375394.7	NP_008860.4
SKIC2	XM_011514815.4	c.2659G>T	p.Asp887Tyr	missense_variant	22/25		XP_011513117.1
SKIC2	XM_047419259.1	c.2659G>T	p.Asp887Tyr	missense_variant	22/25		XP_047275215.1
SKIC2	XM_047419260.1	c.2659G>T	p.Asp887Tyr	missense_variant	22/24		XP_047275216.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SKIC2	ENST00000375394.7	c.2659G>T	p.Asp887Tyr	missense_variant	22/28	1	NM_006929.5	ENSP00000364543.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.43
CADD	Benign	20
DANN	Uncertain	0.99
DEOGEN2	Benign	0.22	T
Eigen	Benign	-0.16
Eigen_PC	Benign	-0.15
FATHMM_MKL	Uncertain	0.80	D
M_CAP	Benign	0.0085	T
MetaRNN	Uncertain	0.53	D
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.69	N
PrimateAI	Benign	0.35	T
PROVEAN	Benign	-2.2	N
REVEL	Benign	0.067
Sift	Uncertain	0.0060	D
Sift4G	Benign	0.17	T
Polyphen		0.53	P
Vest4		0.24
MutPred		0.39		Gain of phosphorylation at D887 (P = 0.0104);
MVP		0.62
MPC		0.68
ClinPred		0.54	D
GERP RS		3.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.056
gMVP		0.58

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: rs3911893; hg19: chr6-31935567;