rs8062961

Variant names:

• chr16-10918877-T-C
• rs8062961
• NM_000246.4:c.3149+351T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_000246.4(CIITA):​c.3149+351T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.979 in 152,314 control chromosomes in the GnomAD database, including 73,144 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 0.98 (73144 hom., cov: 33)
• Consequence: CIITA NM_000246.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -3.42
• Publications: 4 publications found

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]

CIITA Gene-Disease associations (from GenCC):

• MHC class II deficiency

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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.993 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CIITA	NM_000246.4	c.3149+351T>C		intron_variant	Intron 16 of 19	ENST00000324288.14	NP_000237.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CIITA	ENST00000324288.14	c.3149+351T>C		intron_variant	Intron 16 of 19	1	NM_000246.4	ENSP00000316328.8

Frequencies

GnomAD3 genomes AF: 0.979 AC: 149054 AN: 152196 Hom.: 73094 Cov.: 33

Gnomad AFR AF: 0.928

Gnomad AMI AF: 1.00

Gnomad AMR AF: 0.992

Gnomad ASJ AF: 1.00

Gnomad EAS AF: 1.00

Gnomad SAS AF: 1.00

Gnomad FIN AF: 1.00

Gnomad MID AF: 1.00

Gnomad NFE AF: 1.00

Gnomad OTH AF: 0.982

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

GnomAD4 genome AF: 0.979 AC: 149163 AN: 152314 Hom.: 73144 Cov.: 33 AF XY: 0.980 AC XY: 72964 AN XY: 74478

African (AFR) AF: 0.928 AC: 38568 AN: 41544

American (AMR) AF: 0.992 AC: 15189 AN: 15308

Ashkenazi Jewish (ASJ) AF: 1.00 AC: 3472 AN: 3472

East Asian (EAS) AF: 1.00 AC: 5176 AN: 5176

South Asian (SAS) AF: 1.00 AC: 4833 AN: 4834

European-Finnish (FIN) AF: 1.00 AC: 10628 AN: 10628

Middle Eastern (MID) AF: 0.997 AC: 293 AN: 294

European-Non Finnish (NFE) AF: 1.00 AC: 68020 AN: 68036

Other (OTH) AF: 0.982 AC: 2072 AN: 2110

Alfa AF: 0.987 Hom.: 23150

Bravo AF: 0.976

Asia WGS AF: 0.998 AC: 3471 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	0.72
DANN	Benign	0.55
PhyloP100		-3.4
Mutation Taster		=100/0	polymorphism (auto)

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: rs8062961; hg19: chr16-11012734;