9-74497978-T-G

Position:

• chr9-74497978-T-G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_006914.4(RORB):​c.2T>G​(p.Met1?) variant causes a start lost change. 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 Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: RORB NM_006914.4 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.46

Genes affected

RORB (HGNC:10259): (RAR related orphan receptor B) The protein encoded by this gene is a member of the NR1 subfamily of nuclear hormone receptors. It is a DNA-binding protein that can bind as a monomer or as a homodimer to hormone response elements upstream of several genes to enhance the expression of those genes. The encoded protein has been shown to interact with NM23-2, a nucleoside diphosphate kinase involved in organogenesis and differentiation, and to help regulate the expression of some genes involved in circadian rhythm. [provided by RefSeq, Feb 2014]

RORB-AS1 (HGNC:49803): (RORB antisense RNA 1)

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RORB	NM_006914.4	c.2T>G	p.Met1?	start_lost	1/10	ENST00000376896.8	NP_008845.2
RORB-AS1	NR_125791.1	n.312+264A>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RORB	ENST00000376896.8	c.2T>G	p.Met1?	start_lost	1/10	1	NM_006914.4	ENSP00000366093	P1
RORB-AS1	ENST00000417576.2	n.886+264A>C		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 22, 2023

This sequence change affects the initiator methionine of the RORB mRNA. The next in-frame methionine is located at codon 75. This variant is not present in population databases (gnomAD no frequency). Disruption of the initiator codon has been observed in individual(s) with neurodevelopmental disorder (which may include epilepsy) (Invitae). This variant disrupts a region of the RORB protein in which other variant(s) (p.L73P) have been observed in individuals with RORB-related conditions (PMID: 27352968). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.17	D
BayesDel_noAF	Uncertain	0.010
CADD	Uncertain	24
DANN	Uncertain	0.98
Eigen	Uncertain	0.19
Eigen_PC	Uncertain	0.32
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.91	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Uncertain	0.22	D
MutationTaster	Benign	1.0	D
PROVEAN	Benign	-1.9	N
REVEL	Uncertain	0.55
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0040	D
Vest4		0.90
MutPred		0.95		Gain of disorder (P = 0.1023);
MVP		0.29
ClinPred		0.95	D
GERP RS		5.4
gMVP		0.36

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr9-77112894;