rs104894709

chr19-19197545-A-T

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM2 PP3_Strong PP5_Very_Strong

The NM_003721.4(RFXANK):c.362A>T(p.Asp121Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. D121D) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RFXANK NM_003721.4 missense
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:7
• Conservation: PhyloP100: 8.71

Genes affected

RFXANK (HGNC:9987): (regulatory factor X associated ankyrin containing protein) Major histocompatibility (MHC) class II molecules are transmembrane proteins that have a central role in development and control of the immune system. The protein encoded by this gene, along with regulatory factor X-associated protein and regulatory factor-5, forms a complex that binds to the X box motif of certain MHC class II gene promoters and activates their transcription. Once bound to the promoter, this complex associates with the non-DNA-binding factor MHC class II transactivator, which controls the cell type specificity and inducibility of MHC class II gene expression. This protein contains ankyrin repeats involved in protein-protein interactions. Mutations in this gene have been linked to bare lymphocyte syndrome type II, complementation group B. Multiple alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Pathogenic. Variant got 14 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.972
• PP5: Variant 19-19197545-A-T is Pathogenic according to our data. Variant chr19-19197545-A-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 6600.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr19-19197545-A-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RFXANK	NM_003721.4	c.362A>T	p.Asp121Val	missense_variant	6/10	ENST00000303088.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RFXANK	ENST00000303088.9	c.362A>T	p.Asp121Val	missense_variant	6/10	1	NM_003721.4	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:7

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

MHC class II deficiency Pathogenic:5

Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Feb 04, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	Pathology and Clinical Laboratory Medicine, King Fahad Medical City	-	- -
Pathogenic, criteria provided, single submitter	research	Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center	Mar 17, 2024	- -
Likely pathogenic, no assertion criteria provided	clinical testing	Biochemical Molecular Genetic Laboratory, King Abdulaziz Medical City	Sep 26, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Dec 24, 2019	This variant was determined to be pathogenic according to ACMG Guidelines, 2015 [PMID:25741868]. -

Bare lymphocyte syndrome, type II, complementation group B Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Feb 01, 2003

- -

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Blueprint Genetics

Mar 06, 2018

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.39	D
BayesDel_noAF	Pathogenic	0.32
Cadd	Pathogenic	28
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.55	D;.;.;D;.;T;.
Eigen	Uncertain	0.55
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Pathogenic	0.99	D
M_CAP	Pathogenic	0.31	D
MetaRNN	Pathogenic	0.97	D;D;D;D;D;D;D
MetaSVM	Uncertain	-0.0073	T
MutationAssessor	Benign	1.0	L;.;.;L;.;.;.
MutationTaster	Benign	1.0	A;A;A;A;A
PrimateAI	Uncertain	0.51	T
PROVEAN	Pathogenic	-8.9	D;D;.;.;D;D;D
REVEL	Pathogenic	0.75
Sift	Pathogenic	0.0	D;D;.;.;D;D;D
Sift4G	Pathogenic	0.0010	D;D;D;D;D;D;D
Polyphen		1.0	D;.;.;D;.;.;.
Vest4		0.96
MutPred		0.84		Loss of disorder (P = 0.0242);.;.;Loss of disorder (P = 0.0242);.;.;.;
MVP		0.92
MPC		1.1
ClinPred		1.0	D
GERP RS		3.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.92
gMVP		0.88

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: rs104894709; hg19: chr19-19308354;