6-33200287-C-G

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 1P and 6B. PP2 BP4_Moderate BS2

The NM_021976.5(RXRB):c.190G>C(p.Glu64Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000189 in 1,605,606 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.00011 (0 hom., cov: 32)
  • Exomes 𝑓: 0.00020 (0 hom.)
• Consequence: RXRB NM_021976.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.28

Genes affected

RXRB (HGNC:10478): (retinoid X receptor beta) This gene encodes a member of the retinoid X receptor (RXR) family of nuclear receptors which are involved in mediating the effects of retinoic acid (RA). The encoded protein forms homodimers with the retinoic acid, thyroid hormone, and vitamin D receptors, increasing both DNA binding and transcriptional function on their respective response elements. This gene lies within the major histocompatibility complex (MHC) class II region on chromosome 6. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Jul 2012]

SLC39A7 (HGNC:4927): (solute carrier family 39 member 7) The protein encoded by this gene transports zinc from the Golgi and endoplasmic reticulum to the cytoplasm. This transport may be important for activation of tyrosine kinases, some of which could be involved in cancer progression. Therefore, modulation of the encoded protein could be useful as a therapeutic agent against cancer. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jan 2014]

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• PP2: Missense variant where missense usually causes diseases, RXRB
• BP4: Computational evidence support a benign effect (MetaRNN=0.24428803).
• BS2: High AC in GnomAd at 17 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RXRB	NM_021976.5	c.190G>C	p.Glu64Gln	missense_variant	1/10	ENST00000374680.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RXRB	ENST00000374680.4	c.190G>C	p.Glu64Gln	missense_variant	1/10	1	NM_021976.5	P4
RXRB	ENST00000374685.8	c.190G>C	p.Glu64Gln	missense_variant	1/10	1		A1
RXRB	ENST00000483281.5	c.190G>C	p.Glu64Gln	missense_variant, NMD_transcript_variant	1/9	5
SLC39A7	ENST00000698677.1			upstream_gene_variant

Frequencies

GnomAD3 genomes AF: 0.000112 AC: 17 AN: 152236 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000964

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.000176

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000843 AC: 19 AN: 225446 Hom.: 0 AF XY: 0.0000559 AC XY: 7 AN XY: 125232

Gnomad AFR exome AF: 0.0000774

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.000182

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.000197 AC: 286 AN: 1453370 Hom.: 0 Cov.: 31 AF XY: 0.000183 AC XY: 132 AN XY: 722846

Gnomad4 AFR exome AF: 0.0000600

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.000247

Gnomad4 OTH exome AF: 0.000167

GnomAD4 genome AF: 0.000112 AC: 17 AN: 152236 Hom.: 0 Cov.: 32 AF XY: 0.000148 AC XY: 11 AN XY: 74368

Gnomad4 AFR AF: 0.0000964

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.000176

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000842 Hom.: 0

Bravo AF: 0.000128

ExAC AF: 0.0000260 AC: 3

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 24, 2023

The c.190G>C (p.E64Q) alteration is located in exon 1 (coding exon 1) of the RXRB gene. This alteration results from a G to C substitution at nucleotide position 190, causing the glutamic acid (E) at amino acid position 64 to be replaced by a glutamine (Q). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.095
BayesDel_addAF	Benign	-0.11	T
BayesDel_noAF	Benign	-0.13
Cadd	Benign	23
Dann	Uncertain	0.99
Eigen	Uncertain	0.35
Eigen_PC	Uncertain	0.41
FATHMM_MKL	Benign	0.21	N
M_CAP	Pathogenic	0.52	D
MetaRNN	Benign	0.24	T;T
MetaSVM	Uncertain	0.032	D
MutationAssessor	Benign	0.0	N;N
MutationTaster	Benign	0.54	D;D;D;D
PrimateAI	Pathogenic	0.92	D
PROVEAN	Benign	-0.020	N;N
REVEL	Benign	0.26
Sift	Uncertain	0.013	D;D
Sift4G	Benign	0.12	T;T
Polyphen		0.95	.;P
Vest4		0.34
MVP		0.68
MPC		0.45
ClinPred		0.19	T
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.22
gMVP		0.19

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs768449691; hg19: chr6-33168064;