12-100311134-G-A

Variant names:

• chr12-100311134-G-A
• rs772244096
• NM_017988.6:c.571G>A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_017988.6(SCYL2):​c.571G>A​(p.Ala191Thr) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: SCYL2 NM_017988.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.73

Genes affected

SCYL2 (HGNC:19286): (SCY1 like pseudokinase 2) The protein encoded by this gene associates with clathrin-coated complexes at the plasma membrane and with endocytic coated vesicles. The encoded protein phosphorylates the beta2 subunit of the plasma membrane adapter complex AP2 and interacts with clathrin, showing involvement in clathrin-dependent pathways between the trans-Golgi network and the endosomal system. In addition, this protein has a role in the Wnt signaling pathway by targeting frizzled 5 (Fzd5) for lysosomal degradation. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Dec 2015]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.41854537).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SCYL2	NM_017988.6	c.571G>A	p.Ala191Thr	missense_variant	Exon 5 of 18	ENST00000360820.7	NP_060458.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SCYL2	ENST00000360820.7	c.571G>A	p.Ala191Thr	missense_variant	Exon 5 of 18	1	NM_017988.6	ENSP00000354061.2
SCYL2	ENST00000635101.1	c.571G>A	p.Ala191Thr	missense_variant	Exon 5 of 19	5		ENSP00000489123.1
SCYL2	ENST00000549687.5	c.571G>A	p.Ala191Thr	missense_variant	Exon 5 of 17	2		ENSP00000448366.1
SCYL2	ENST00000548392.5	c.52G>A	p.Ala18Thr	missense_variant	Exon 4 of 5	4		ENSP00000450294.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 6.86e-7 AC: 1 AN: 1457938 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 725192

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 9.00e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Nov 21, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.571G>A (p.A191T) alteration is located in exon 5 (coding exon 4) of the SCYL2 gene. This alteration results from a G to A substitution at nucleotide position 571, causing the alanine (A) at amino acid position 191 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.32
BayesDel_addAF	Uncertain	0.041	T
BayesDel_noAF	Benign	-0.18
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.017	T;T;T;T
Eigen	Uncertain	0.34
Eigen_PC	Uncertain	0.44
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.95	D;D;D;D
M_CAP	Benign	0.031	D
MetaRNN	Benign	0.42	T;T;T;T
MetaSVM	Benign	-0.56	T
MutationAssessor	Benign	1.1	.;.;.;L
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-2.2	N;N;.;N
REVEL	Benign	0.19
Sift	Benign	0.056	T;D;.;T
Sift4G	Benign	0.20	T;T;T;T
Polyphen		0.63	.;.;.;P
Vest4		0.43, 0.42
MutPred		0.50		Gain of catalytic residue at L186 (P = 2e-04);.;Gain of catalytic residue at L186 (P = 2e-04);Gain of catalytic residue at L186 (P = 2e-04);
MVP		0.49
MPC		0.22
ClinPred		0.92	D
GERP RS		5.0
Varity_R		0.25
gMVP		0.44

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: rs772244096; hg19: chr12-100704912;