rs869025221

Variant names:

• chr3-25593603-G-C
• rs869025221
• NM_000965.5:c.887G>C

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PM1 PM2 PP2 PP3_Strong PP5_Moderate

The NM_000965.5(RARB):​c.887G>C​(p.Gly296Ala) 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G296V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: RARB NM_000965.5 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 10.0
• Publications: 4 publications found

Genes affected

RARB (HGNC:9865): (retinoic acid receptor beta) This gene encodes retinoic acid receptor beta, a member of the thyroid-steroid hormone receptor superfamily of nuclear transcriptional regulators. This receptor localizes to the cytoplasm and to subnuclear compartments. It binds retinoic acid, the biologically active form of vitamin A which mediates cellular signalling in embryonic morphogenesis, cell growth and differentiation. It is thought that this protein limits growth of many cell types by regulating gene expression. The gene was first identified in a hepatocellular carcinoma where it flanks a hepatitis B virus integration site. Alternate promoter usage and differential splicing result in multiple transcript variants. [provided by RefSeq, Mar 2014]

RARB Gene-Disease associations (from GenCC):

• microphthalmia, syndromic 12

  Inheritance: AR, AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia, ClinGen, Baylor College of Medicine Research Center
• Matthew-Wood syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PM1: In a domain NR LBD (size 234) in uniprot entity RARB_HUMAN there are 15 pathogenic changes around while only 3 benign (83%) in NM_000965.5
• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in the RARB gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 15 curated pathogenic missense variants (we use a threshold of 10). The gene has 2 curated benign missense variants. Gene score misZ: 2.8661 (below the threshold of 3.09). Trascript score misZ: 3.1257 (above the threshold of 3.09). GenCC associations: The gene is linked to microphthalmia, syndromic 12, Matthew-Wood syndrome.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.948
• PP5: Variant 3-25593603-G-C is Pathogenic according to our data. Variant chr3-25593603-G-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 218338.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RARB	NM_000965.5	c.887G>C	p.Gly296Ala	missense_variant	Exon 6 of 8	ENST00000330688.9	NP_000956.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RARB	ENST00000330688.9	c.887G>C	p.Gly296Ala	missense_variant	Exon 6 of 8	1	NM_000965.5	ENSP00000332296.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Microphthalmia, syndromic 12 Pathogenic:1

Jan 01, 2015

CHU Sainte-Justine Research Center, University of Montreal

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.46	D
BayesDel_noAF	Pathogenic	0.43
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.71	D;.;.;.
Eigen	Pathogenic	0.94
Eigen_PC	Pathogenic	0.94
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Pathogenic	1.0	D;.;D;D
M_CAP	Uncertain	0.25	D
MetaRNN	Pathogenic	0.95	D;D;D;D
MetaSVM	Pathogenic	1.0	D
PhyloP100		10
PrimateAI	Pathogenic	0.93	D
PROVEAN	Pathogenic	-5.1	D;D;D;D
REVEL	Pathogenic	0.90
Sift	Uncertain	0.0020	D;D;D;D
Sift4G	Uncertain	0.056	T;T;D;T
Vest4		0.88, 0.90, 0.88
MutPred		0.83		Loss of catalytic residue at G301 (P = 0.2434);.;.;.;
MVP		0.98
MPC		2.0
ClinPred		1.0	D
GERP RS		6.0
gMVP		0.87
Mutation Taster		=1/99	disease causing (ClinVar)

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: rs869025221; hg19: chr3-25635094;