chr22-19355982-C-A

Position:

• chr22-19355982-C-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_003325.4(HIRA):​c.2456-117G>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00615 in 780,096 control chromosomes in the GnomAD database, including 153 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.020 (113 hom., cov: 33)
  • Exomes 𝑓: 0.0028 (40 hom.)
• Consequence: HIRA NM_003325.4 intron
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -1.93

Genes affected

HIRA (HGNC:4916): (histone cell cycle regulator) This gene encodes a histone chaperone that preferentially places the variant histone H3.3 in nucleosomes. Orthologs of this gene in yeast, flies, and plants are necessary for the formation of transcriptionally silent heterochomatin. This gene plays an important role in the formation of the senescence-associated heterochromatin foci. These foci likely mediate the irreversible cell cycle changes that occur in senescent cells. It is considered the primary candidate gene in some haploinsufficiency syndromes such as DiGeorge syndrome, and insufficient production of the gene may disrupt normal embryonic development. [provided by RefSeq, Jul 2008]

C22orf39 (HGNC:27012): (chromosome 22 open reading frame 39)

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.82).
• BP6: Variant 22-19355982-C-A is Benign according to our data. Variant chr22-19355982-C-A is described in ClinVar as [Benign]. Clinvar id is 1235925.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0666 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HIRA	NM_003325.4	c.2456-117G>T		intron_variant		ENST00000263208.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HIRA	ENST00000263208.5	c.2456-117G>T		intron_variant		1	NM_003325.4	P1
HIRA	ENST00000340170.8	c.1835-117G>T		intron_variant		1
C22orf39	ENST00000509549.5	c.*2331+248G>T		intron_variant, NMD_transcript_variant		2

Frequencies

GnomAD3 genomes AF: 0.0200 AC: 3041 AN: 152204 Hom.: 113 Cov.: 33

Gnomad AFR AF: 0.0687

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00929

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00316

Gnomad NFE AF: 0.000309

Gnomad OTH AF: 0.0153

GnomAD4 exome AF: 0.00278 AC: 1747 AN: 627774 Hom.: 40 AF XY: 0.00224 AC XY: 735 AN XY: 327996

Gnomad4 AFR exome AF: 0.0736

Gnomad4 AMR exome AF: 0.00521

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.000107

Gnomad4 FIN exome AF: 0.0000250

Gnomad4 NFE exome AF: 0.000252

Gnomad4 OTH exome AF: 0.00610

GnomAD4 genome AF: 0.0200 AC: 3052 AN: 152322 Hom.: 113 Cov.: 33 AF XY: 0.0193 AC XY: 1441 AN XY: 74488

Gnomad4 AFR AF: 0.0687

Gnomad4 AMR AF: 0.00928

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000309

Gnomad4 OTH AF: 0.0152

Alfa AF: 0.000286 Hom.: 0

Bravo AF: 0.0237

Asia WGS AF: 0.00577 AC: 20 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:2

Benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	May 23, 2021	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.82
CADD	Benign	0.078
DANN	Benign	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: rs5993612; hg19: chr22-19343505;