chr20-34457451-A-G

Variant names:

• chr20-34457451-A-G
• rs749700496
• NM_031483.7:c.1272A>G

Variant summary

Our verdict is Benign. The variant received -11 ACMG points: 2P and 13B. PM2 BP4_Strong BP6_Very_Strong BP7

The NM_031483.7(ITCH):​c.1272A>G​(p.Gln424Gln) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000316 in 1,611,604 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.000053 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000029 (0 hom.)
• Consequence: ITCH NM_031483.7 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: 0.486
• Publications: 0 publications found

Genes affected

ITCH (HGNC:13890): (itchy E3 ubiquitin protein ligase) This gene encodes a member of the Nedd4 family of HECT domain E3 ubiquitin ligases. HECT domain E3 ubiquitin ligases transfer ubiquitin from E2 ubiquitin-conjugating enzymes to protein substrates, thus targeting specific proteins for lysosomal degradation. The encoded protein plays a role in multiple cellular processes including erythroid and lymphoid cell differentiation and the regulation of immune responses. Mutations in this gene are a cause of syndromic multisystem autoimmune disease. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Mar 2012]

ITCH Gene-Disease associations (from GenCC):

• syndromic multisystem autoimmune disease due to ITCH deficiency

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE, SUPPORTIVE Submitted by: ClinGen, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), G2P

ENSG00000289720 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -11 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.49).
• BP6: Variant 20-34457451-A-G is Benign according to our data. Variant chr20-34457451-A-G is described in ClinVar as Likely_benign. ClinVar VariationId is 471416.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=0.486 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_031483.7. 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
	ITCH	NM_031483.7	MANE Select	c.1272A>G	p.Gln424Gln	synonymous	Exon 13 of 25	NP_113671.3
	ITCH	NM_001257137.3		c.1395A>G	p.Gln465Gln	synonymous	Exon 14 of 26	NP_001244066.1	Q96J02-1
	ITCH	NM_001324197.2		c.1395A>G	p.Gln465Gln	synonymous	Exon 14 of 26	NP_001311126.1	Q96J02-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ITCH	ENST00000374864.10	TSL:1 MANE Select	c.1272A>G	p.Gln424Gln	synonymous	Exon 13 of 25	ENSP00000363998.4	Q96J02-2
	ITCH	ENST00000262650.11	TSL:1	c.1395A>G	p.Gln465Gln	synonymous	Exon 14 of 26	ENSP00000262650.5	Q96J02-1
	ENSG00000289720	ENST00000696979.1		n.1272A>G		non_coding_transcript_exon	Exon 13 of 28	ENSP00000513014.1

Frequencies

GnomAD3 genomes AF: 0.0000526 AC: 8 AN: 152220 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.000288

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000103

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000438 AC: 11 AN: 251116 AF XY: 0.0000368

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.000298

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000616

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000295 AC: 43 AN: 1459384 Hom.: 0 Cov.: 29 AF XY: 0.0000262 AC XY: 19 AN XY: 726164

African (AFR) AF: 0.00 AC: 0 AN: 33408

American (AMR) AF: 0.00 AC: 0 AN: 44696

Ashkenazi Jewish (ASJ) AF: 0.000192 AC: 5 AN: 26090

East Asian (EAS) AF: 0.00 AC: 0 AN: 39660

South Asian (SAS) AF: 0.00 AC: 0 AN: 86128

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53404

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.0000324 AC: 36 AN: 1109922

Other (OTH) AF: 0.0000332 AC: 2 AN: 60314

GnomAD4 genome AF: 0.0000526 AC: 8 AN: 152220 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74368

African (AFR) AF: 0.00 AC: 0 AN: 41450

American (AMR) AF: 0.00 AC: 0 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.000288 AC: 1 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5208

South Asian (SAS) AF: 0.00 AC: 0 AN: 4836

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10618

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.000103 AC: 7 AN: 68032

Other (OTH) AF: 0.00 AC: 0 AN: 2090

Alfa AF: 0.0000823 Hom.: 0

Bravo AF: 0.0000340

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
-	-	1	not provided (1)
-	-	1	Syndromic multisystem autoimmune disease due to ITCH deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.49
CADD	Benign	3.0
DANN	Benign	0.70
PhyloP100		0.49
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=99/1	polymorphism

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

Other links and lift over

dbSNP: rs749700496; hg19: chr20-33045256;