rs150739070

Positions:

• chr7-22960413-A-C

Variant summary

Our verdict is Benign. Variant got -19 ACMG points: 0P and 19B. BP4_Moderate BP6_Very_Strong BP7 BS1 BS2

The NM_032581.4(HYCC1):​c.834T>G​(p.Val278=) variant causes a splice region, synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00101 in 1,611,402 control chromosomes in the GnomAD database, including 13 homozygotes. In-silico tool predicts a benign outcome for this variant. 1/1 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0012 (1 hom., cov: 32)
  • Exomes 𝑓: 0.00099 (12 hom.)
• Consequence: HYCC1 NM_032581.4 splice_region, synonymous
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 2.89

Genes affected

HYCC1 (HGNC:24587): (hyccin PI4KA lipid kinase complex subunit 1) The protein encoded by this gene may play a part in the beta-catenin/Lef signaling pathway. Expression of this gene is down-regulated by beta-catenin. Defects in this gene are a cause of hypomyelination with congenital cataract (HCC). [provided by RefSeq, Oct 2008]

ACMG classification

Verdict is Benign. Variant got -19 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.38).
• BP6: Variant 7-22960413-A-C is Benign according to our data. Variant chr7-22960413-A-C is described in ClinVar as [Benign]. Clinvar id is 468356.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=2.89 with no splicing effect.
• BS1: Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.00123 (187/152282) while in subpopulation EAS AF= 0.0222 (115/5180). AF 95% confidence interval is 0.0189. There are 1 homozygotes in gnomad4. There are 112 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome4 at 12 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HYCC1	NM_032581.4	c.834T>G	p.Val278=	splice_region_variant, synonymous_variant	10/11	ENST00000432176.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HYCC1	ENST00000432176.7	c.834T>G	p.Val278=	splice_region_variant, synonymous_variant	10/11	1	NM_032581.4

Frequencies

GnomAD3 genomes AF: 0.00122 AC: 186 AN: 152164 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000196

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.0220

Gnomad SAS AF: 0.00249

Gnomad FIN AF: 0.00292

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000206

Gnomad OTH AF: 0.000956

GnomAD3 exomes AF: 0.00230 AC: 576 AN: 250756 Hom.: 5 AF XY: 0.00235 AC XY: 319 AN XY: 135548

Gnomad AFR exome AF: 0.000431

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0231

Gnomad SAS exome AF: 0.00101

Gnomad FIN exome AF: 0.00314

Gnomad NFE exome AF: 0.000353

Gnomad OTH exome AF: 0.000818

GnomAD4 exome AF: 0.000986 AC: 1439 AN: 1459120 Hom.: 12 Cov.: 30 AF XY: 0.00105 AC XY: 762 AN XY: 726082

Gnomad4 AFR exome AF: 0.000150

Gnomad4 AMR exome AF: 0.0000671

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0235

Gnomad4 SAS exome AF: 0.00111

Gnomad4 FIN exome AF: 0.00308

Gnomad4 NFE exome AF: 0.000137

Gnomad4 OTH exome AF: 0.00148

GnomAD4 genome AF: 0.00123 AC: 187 AN: 152282 Hom.: 1 Cov.: 32 AF XY: 0.00150 AC XY: 112 AN XY: 74470

Gnomad4 AFR AF: 0.000241

Gnomad4 AMR AF: 0.000196

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.0222

Gnomad4 SAS AF: 0.00249

Gnomad4 FIN AF: 0.00292

Gnomad4 NFE AF: 0.000206

Gnomad4 OTH AF: 0.000946

Alfa AF: 0.000244 Hom.: 0

Bravo AF: 0.00122

Asia WGS AF: 0.0140 AC: 47 AN: 3478

EpiCase AF: 0.000164

EpiControl AF: 0.000356

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Hypomyelination and Congenital Cataract Benign:2

Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 16, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.38
CADD	Benign	11
DANN	Benign	0.83

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: rs150739070; hg19: chr7-23000032;