rs6498122

chr16-10900325-G-Achr16-10900325-G-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000246.4(CIITA):c.437-1189G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.755 in 152,170 control chromosomes in the GnomAD database, including 44,659 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.76 (44659 hom., cov: 33)
• Consequence: CIITA NM_000246.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.539

Genes affected

CIITA (HGNC:7067): (class II major histocompatibility complex transactivator) This gene encodes a protein with an acidic transcriptional activation domain, 4 LRRs (leucine-rich repeats) and a GTP binding domain. The protein is located in the nucleus and acts as a positive regulator of class II major histocompatibility complex gene transcription, and is referred to as the "master control factor" for the expression of these genes. The protein also binds GTP and uses GTP binding to facilitate its own transport into the nucleus. Once in the nucleus it does not bind DNA but rather uses an intrinsic acetyltransferase (AT) activity to act in a coactivator-like fashion. Mutations in this gene have been associated with bare lymphocyte syndrome type II (also known as hereditary MHC class II deficiency or HLA class II-deficient combined immunodeficiency), increased susceptibility to rheumatoid arthritis, multiple sclerosis, and possibly myocardial infarction. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2013]

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.843 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CIITA	NM_000246.4	c.437-1189G>A		intron_variant		ENST00000324288.14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CIITA	ENST00000324288.14	c.437-1189G>A		intron_variant		1	NM_000246.4	P4

Frequencies

GnomAD3 genomes AF: 0.755 AC: 114870 AN: 152052 Hom.: 44646 Cov.: 33

Gnomad AFR AF: 0.556

Gnomad AMI AF: 0.840

Gnomad AMR AF: 0.855

Gnomad ASJ AF: 0.838

Gnomad EAS AF: 0.833

Gnomad SAS AF: 0.813

Gnomad FIN AF: 0.895

Gnomad MID AF: 0.813

Gnomad NFE AF: 0.816

Gnomad OTH AF: 0.795

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.755 AC: 114923 AN: 152170 Hom.: 44659 Cov.: 33 AF XY: 0.763 AC XY: 56778 AN XY: 74400

Gnomad4 AFR AF: 0.556

Gnomad4 AMR AF: 0.855

Gnomad4 ASJ AF: 0.838

Gnomad4 EAS AF: 0.833

Gnomad4 SAS AF: 0.814

Gnomad4 FIN AF: 0.895

Gnomad4 NFE AF: 0.816

Gnomad4 OTH AF: 0.790

Alfa AF: 0.813 Hom.: 45529

Bravo AF: 0.744

Asia WGS AF: 0.782 AC: 2720 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
Cadd	Benign	0.82
Dann	Benign	0.26

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: rs6498122; hg19: chr16-10994182;