Genetic Variant CIITA:p.Pro231Ser (chr16-10902720-C-T) – ACMG Classification: Benign (-14 pts)

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_StrongBP6_ModerateBS1BS2

The NM_000246.4(CIITA):c.691C>T(p.Pro231Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000513 in 1,614,184 control chromosomes in the GnomAD database, including 12 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★). Synonymous variant affecting the same amino acid position (i.e. P231P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00091 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00047 ( 12 hom. )

Consequence

CIITA
NM_000246.4 missense

Scores

Clinical Significance

Benign criteria provided, single submitter B:4

Conservation

PhyloP100: 0.917

Publications

7 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, Labcorp Genetics (formerly Invitae), Orphanet

CIITA links:

ENSG00000308110 (HGNC:):

ENSG00000308110 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -14 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.006098479).

BP6

Variant 16-10902720-C-T is Benign according to our data. Variant chr16-10902720-C-T is described in ClinVar as Benign. ClinVar VariationId is 528792.Status of the report is criteria_provided_single_submitter, 1 stars.

BS1

Variant frequency is greater than expected in population eas. GnomAd4 allele frequency = 0.000906 (138/152300) while in subpopulation EAS AF = 0.0207 (107/5176). AF 95% confidence interval is 0.0175. There are 0 homozygotes in GnomAd4. There are 63 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 12 AR gene

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.691C>T	p.Pro231Ser	missense	Exon 8 of 20	NP_000237.2
CIITA	NM_001286402.1		c.694C>T	p.Pro232Ser	missense	Exon 8 of 20	NP_001273331.1	A0A087X2I7
CIITA	NM_001379332.1		c.694C>T	p.Pro232Ser	missense	Exon 8 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.691C>T	p.Pro231Ser	missense	Exon 8 of 20	ENSP00000316328.8
CIITA	ENST00000381835.9	TSL:1	c.544C>T	p.Pro182Ser	missense	Exon 7 of 18	ENSP00000371257.5	P33076-3
CIITA	ENST00000537380.1	TSL:1	n.691C>T		non_coding_transcript_exon	Exon 8 of 11

Frequencies

GnomAD3 genomes

AF:

0.000913

AC:

139

AN:

152182

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.0208

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00191

GnomAD2 exomes

AF:

0.00189

AC:

475

AN:

251496

AF XY:

0.00170

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0250

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000472

AC:

690

AN:

1461884

Hom.:

Cov.:

AF XY:

0.000425

AC XY:

309

AN XY:

727244

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33480

American (AMR)

AF:

0.000112

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0130

AC:

518

AN:

39700

South Asian (SAS)

AF:

0.000139

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1112006

Other (OTH)

AF:

0.00250

AC:

151

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.470

Heterozygous variant carriers

128

171

214

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.000906

AC:

138

AN:

152300

Hom.:

Cov.:

AF XY:

0.000846

AC XY:

AN XY:

74470

show subpopulations

African (AFR)

AF:

0.0000722

AC:

AN:

41564

American (AMR)

AF:

0.00131

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.0207

AC:

107

AN:

5176

South Asian (SAS)

AF:

0.000414

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

68022

Other (OTH)

AF:

0.00189

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<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:

0.000655

Hom.:

Bravo

AF:

0.000805

TwinsUK

AF:

0.000270

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.00152

AC:

184

Asia WGS

AF:

0.0100

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

MHC class II deficiency (2)

not provided (1)

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.098

BayesDel_addAF

Benign

-0.45

BayesDel_noAF

Benign

-0.40

CADD

Benign

6.9

(source)

DANN

Uncertain

0.99

Eigen

Benign

-0.60

Eigen_PC

Benign

-0.58

FATHMM_MKL

Benign

0.37

LIST_S2

Benign

0.69

MetaRNN

Benign

0.0061

MetaSVM

Benign

-0.79

PhyloP100

0.92

PrimateAI

Benign

0.31

PROVEAN

Benign

-2.2

REVEL

Benign

0.090

Sift

Benign

0.15

Sift4G

Pathogenic

0.0

Vest4

0.13

MVP

0.79

MPC

0.13

ClinPred

0.039

GERP RS

1.2

gMVP

0.28

Mutation Taster

=100/0

polymorphism

(source)

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

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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