NM_006398.4:c.203T>G

Variant names:

• chr6-29556175-A-C
• rs2076485
• NM_006398.4:c.203T>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_006398.4(UBD):​c.203T>G​(p.Ile68Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: UBD NM_006398.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.639
• Publications: 36 publications found

Genes affected

UBD (HGNC:18795): (ubiquitin D) This gene encodes a protein which contains two ubiquitin-like domains and appears to have similar function to ubiquitin. Through covalent attachment, the encoded protein targets other proteins for 26S proteasome degradation. This protein has been implicated to function in many cellular processes, including caspase-dependent apoptosis, formation of aggresomes, mitotic regulation, and dendritic cell maturation. Upregulation of this gene may promote inflammation in chronic kidney disease and has been observed in many cancer types. [provided by RefSeq, Aug 2017]

OR2I1 (HGNC:8258): (olfactory receptor family 2 subfamily I member 1 pseudogene) Olfactory receptors interact with odorant molecules in the nose, to initiate a neuronal response that triggers the perception of a smell. The olfactory receptor proteins are members of a large family of G-protein-coupled receptors (GPCR) arising from single coding-exon genes. Olfactory receptors share a 7-transmembrane domain structure with many neurotransmitter and hormone receptors and are responsible for the recognition and G protein-mediated transduction of odorant signals. The olfactory receptor gene family is the largest in the genome. The nomenclature assigned to the olfactory receptor genes and proteins for this organism is independent of other organisms. [provided by RefSeq, Jul 2008]

GABBR1 (HGNC:4070): (gamma-aminobutyric acid type B receptor subunit 1) This gene encodes a receptor for gamma-aminobutyric acid (GABA), which is the main inhibitory neurotransmitter in the mammalian central nervous system. This receptor functions as a heterodimer with GABA(B) receptor 2. Defects in this gene may underlie brain disorders such as schizophrenia and epilepsy. Alternative splicing generates multiple transcript variants, but the full-length nature of some of these variants has not been determined. [provided by RefSeq, Jan 2016]

GABBR1 Gene-Disease associations (from GenCC):

• neurodevelopmental disorder with language delay and variable cognitive abnormalities

  Inheritance: AD Classification: MODERATE Submitted by: G2P

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
UBD	NM_006398.4	c.203T>G	p.Ile68Ser	missense_variant	Exon 2 of 2	ENST00000377050.5	NP_006389.2
OR2I1	NM_001396058.1	c.*2009A>C		3_prime_UTR_variant	Exon 2 of 2	ENST00000641137.2	NP_001382987.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
UBD	ENST00000377050.5	c.203T>G	p.Ile68Ser	missense_variant	Exon 2 of 2	1	NM_006398.4	ENSP00000366249.4
OR2I1P	ENST00000641137.2	c.*2009A>C		3_prime_UTR_variant	Exon 2 of 2		NM_001396058.1	ENSP00000493715.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000406 AC: 1 AN: 246476 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 6.85e-7 AC: 1 AN: 1460714 Hom.: 0 Cov.: 59 AF XY: 0.00 AC XY: 0 AN XY: 726668

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44718

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: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 52314

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111962

Other (OTH) AF: 0.00 AC: 0 AN: 60384

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000846 AC: 1

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.32
BayesDel_addAF	Uncertain	0.055	T
BayesDel_noAF	Uncertain	-0.060
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.52	D
Eigen	Uncertain	0.25
Eigen_PC	Benign	0.13
FATHMM_MKL	Benign	0.28	N
M_CAP	Benign	0.029	D
MetaRNN	Uncertain	0.72	D
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Pathogenic	3.9	H
PhyloP100		0.64
PrimateAI	Benign	0.48	T
PROVEAN	Pathogenic	-5.6	D
REVEL	Uncertain	0.55
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.0030	D
Polyphen		1.0	D
Vest4		0.46
MutPred		0.49		Loss of stability (P = 0.002);
MVP		0.82
MPC		0.74
ClinPred		0.97	D
GERP RS		3.0
Varity_R		0.62
gMVP		0.54
Mutation Taster		=95/5	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: rs2076485; hg19: chr6-29523952;