rs7197779

Positions:

• chr16-10909070-A-C
• chr16-10909070-A-G
• chr16-10909070-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000246.4(CIITA):​c.2699A>C​(p.Gln900Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 11/19 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. Q900R) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: CIITA NM_000246.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.922

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 Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.27656).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CIITA	NM_000246.4	c.2699A>C	p.Gln900Pro	missense_variant	12/20	ENST00000324288.14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CIITA	ENST00000324288.14	c.2699A>C	p.Gln900Pro	missense_variant	12/20	1	NM_000246.4	P4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 66

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Uncertain	0.021	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	12
DANN	Benign	0.96
Eigen	Benign	-0.81
Eigen_PC	Benign	-0.82
FATHMM_MKL	Benign	0.69	D
LIST_S2	Benign	0.43	T;T;T
M_CAP	Benign	0.074	D
MetaRNN	Benign	0.28	T;T;T
MetaSVM	Benign	-0.52	T
MutationTaster	Benign	1.0	P;P
PrimateAI	Benign	0.20	T
PROVEAN	Uncertain	-2.9	.;D;N
REVEL	Benign	0.24
Sift	Benign	0.27	.;T;D
Sift4G	Uncertain	0.019	D;D;D
Vest4		0.39
MutPred		0.42		.;Loss of stability (P = 0.1289);.;
MVP		0.83
MPC		0.21
ClinPred		0.53	D
GERP RS		-0.25
gMVP		0.73

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: rs7197779; hg19: chr16-11002927;