1-151343137-G-T

Variant names:

• chr1-151343137-G-T
• rs2233853
• NM_001025603.2:c.900C>A

Variant summary

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

The NM_001025603.2(RFX5):​c.900C>A​(p.Leu300Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000685 in 1,459,528 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. L300L) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: RFX5 NM_001025603.2 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.96
• Publications: 0 publications found

Genes affected

RFX5 (HGNC:9986): (regulatory factor X5) A lack of MHC-II expression results in a severe immunodeficiency syndrome called MHC-II deficiency, or the bare lymphocyte syndrome (BLS; MIM 209920). At least 4 complementation groups have been identified in B-cell lines established from patients with BLS. The molecular defects in complementation groups B, C, and D all lead to a deficiency in RFX, a nuclear protein complex that binds to the X box of MHC-II promoters. The lack of RFX binding activity in complementation group C results from mutations in the RFX5 gene encoding the 75-kD subunit of RFX (Steimle et al., 1995). RFX5 is the fifth member of the growing family of DNA-binding proteins sharing a novel and highly characteristic DNA-binding domain called the RFX motif. Multiple alternatively spliced transcript variants have been found but the full-length natures of only two have been determined. [provided by RefSeq, Jul 2008]

RFX5-AS1 (HGNC:40503): (RFX5 antisense RNA 1)

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=-0.9).
• BP7: Synonymous conserved (PhyloP=-1.96 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001025603.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RFX5	NM_001025603.2	MANE Select	c.900C>A	p.Leu300Leu	synonymous	Exon 11 of 11	NP_001020774.1
	RFX5	NM_000449.4		c.900C>A	p.Leu300Leu	synonymous	Exon 11 of 11	NP_000440.1
	RFX5	NM_001379412.1		c.900C>A	p.Leu300Leu	synonymous	Exon 11 of 11	NP_001366341.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RFX5	ENST00000452671.7	TSL:1 MANE Select	c.900C>A	p.Leu300Leu	synonymous	Exon 11 of 11	ENSP00000389130.2
	RFX5	ENST00000290524.8	TSL:1	c.900C>A	p.Leu300Leu	synonymous	Exon 11 of 11	ENSP00000290524.4
	RFX5	ENST00000368870.6	TSL:5	c.900C>A	p.Leu300Leu	synonymous	Exon 11 of 11	ENSP00000357864.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.85e-7 AC: 1 AN: 1459528 Hom.: 0 Cov.: 33 AF XY: 0.00000138 AC XY: 1 AN XY: 726002

African (AFR) AF: 0.00 AC: 0 AN: 33440

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86188

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52470

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4618

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111996

Other (OTH) AF: 0.00 AC: 0 AN: 60256

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.90
CADD	Benign	0.039
DANN	Benign	0.71
PhyloP100		-2.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=100/0	polymorphism

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: rs2233853; hg19: chr1-151315613;