dbSNP rs2229318: CIITA:p.Cys75Cys (chr16-10895694-C-T) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_000246.4(CIITA):c.225C>T(p.Cys75Cys) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00567 in 1,614,074 control chromosomes in the GnomAD database, including 469 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.030 ( 227 hom., cov: 32)

Exomes 𝑓: 0.0031 ( 242 hom. )

Consequence

CIITA
NM_000246.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -1.76

Publications

6 publications found

Variant links:

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: ClinGen, Orphanet, Labcorp Genetics (formerly Invitae)

CIITA links:

ENSG00000308110 (HGNC:):

ENSG00000308110 links:

Genome browser will be placed here

new If you want to explore the variant's impact on the transcript NM_000246.4, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.54).

BP6

Variant 16-10895694-C-T is Benign according to our data. Variant chr16-10895694-C-T is described in ClinVar as Benign. ClinVar VariationId is 317677.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-1.76 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.102 is higher than 0.05.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000246.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CIITA	NM_000246.4	MANE Select	c.225C>T	p.Cys75Cys	synonymous	Exon 3 of 20	NP_000237.2
CIITA	NM_001286402.1		c.225C>T	p.Cys75Cys	synonymous	Exon 3 of 20	NP_001273331.1	A0A087X2I7
CIITA	NM_001379332.1		c.225C>T	p.Cys75Cys	synonymous	Exon 3 of 20	NP_001366261.1	A0A087X2I7

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
CIITA	ENST00000324288.14	TSL:1 MANE Select	c.225C>T	p.Cys75Cys	synonymous	Exon 3 of 20	ENSP00000316328.8
CIITA	ENST00000381835.9	TSL:1	c.225C>T	p.Cys75Cys	synonymous	Exon 3 of 18	ENSP00000371257.5	P33076-3
CIITA	ENST00000537380.1	TSL:1	n.225C>T		non_coding_transcript_exon	Exon 3 of 11

Frequencies

GnomAD3 genomes

AF:

0.0299

AC:

4552

AN:

152090

Hom.:

226

Cov.:

show subpopulations

Gnomad AFR

AF:

0.105

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0107

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000578

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000250

Gnomad OTH

AF:

0.0172

GnomAD2 exomes

AF:

0.00778

AC:

1955

AN:

251442

AF XY:

0.00551

show subpopulations

Gnomad AFR exome

AF:

0.107

Gnomad AMR exome

AF:

0.00468

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000967

Gnomad OTH exome

AF:

0.00277

GnomAD4 exome

AF:

0.00313

AC:

4580

AN:

1461866

Hom.:

242

Cov.:

AF XY:

0.00267

AC XY:

1941

AN XY:

727242

show subpopulations

African (AFR)

AF:

0.112

AC:

3764

AN:

33480

American (AMR)

AF:

0.00528

AC:

236

AN:

44722

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.000101

AC:

AN:

39700

South Asian (SAS)

AF:

0.000580

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00416

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000621

AC:

AN:

1111996

Other (OTH)

AF:

0.00717

AC:

433

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.461

Heterozygous variant carriers

248

497

745

994

1242

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

116

232

348

464

580

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0300

AC:

4567

AN:

152208

Hom.:

227

Cov.:

AF XY:

0.0292

AC XY:

2171

AN XY:

74410

show subpopulations

African (AFR)

AF:

0.105

AC:

4344

AN:

41494

American (AMR)

AF:

0.0107

AC:

163

AN:

15290

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000579

AC:

AN:

5182

South Asian (SAS)

AF:

0.000622

AC:

AN:

4822

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000250

AC:

AN:

68032

Other (OTH)

AF:

0.0170

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

204

407

611

814

1018

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

100

150

200

250

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.0151

Hom.:

Bravo

AF:

0.0345

Asia WGS

AF:

0.00722

AC:

AN:

3478

EpiCase

AF:

0.000164

EpiControl

AF:

0.000296

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

MHC class II deficiency (3)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.54

CADD

Benign

0.24

(source)

DANN

Benign

0.83

PhyloP100

-1.8

Mutation Taster

=100/0

polymorphism (auto)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over