13-36819711-G-T

Variant names:

• chr13-36819711-G-T
• rs113555392
• NM_000538.4:c.354G>T

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_000538.4(RFXAP):​c.354G>T​(p.Ser118Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000286 in 1,398,194 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. S118S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000029 (0 hom.)
• Consequence: RFXAP NM_000538.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.87
• Publications: 0 publications found

Genes affected

RFXAP (HGNC:9988): (regulatory factor X associated 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 ankyrin-containing 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. Mutations in this gene have been linked to bare lymphocyte syndrome type II, complementation group D. Transcript variants utilizing different polyA signals have been found for this gene. [provided by RefSeq, Jul 2008]

RFXAP Gene-Disease associations (from GenCC):

• MHC class II deficiency

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

ENSG00000309469 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.65).
• BP7: Synonymous conserved (PhyloP=-1.87 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RFXAP	NM_000538.4	c.354G>T	p.Ser118Ser	synonymous_variant	Exon 1 of 3	ENST00000255476.3	NP_000529.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RFXAP	ENST00000255476.3	c.354G>T	p.Ser118Ser	synonymous_variant	Exon 1 of 3	1	NM_000538.4	ENSP00000255476.3
ENSG00000309469	ENST00000841309.1	n.-13C>A		upstream_gene_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000286 AC: 4 AN: 1398194 Hom.: 0 Cov.: 31 AF XY: 0.00000290 AC XY: 2 AN XY: 689576

African (AFR) AF: 0.00 AC: 0 AN: 31626

American (AMR) AF: 0.00 AC: 0 AN: 35690

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25128

East Asian (EAS) AF: 0.00 AC: 0 AN: 35768

South Asian (SAS) AF: 0.00 AC: 0 AN: 79188

European-Finnish (FIN) AF: 0.0000207 AC: 1 AN: 48298

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5686

European-Non Finnish (NFE) AF: 0.00000278 AC: 3 AN: 1078820

Other (OTH) AF: 0.00 AC: 0 AN: 57990

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.65
CADD	Benign	1.2
DANN	Benign	0.75
PhyloP100		-1.9
PromoterAI		0.029	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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: rs113555392; hg19: chr13-37393848;