6-154010744-GC-G

Position:

• chr6-154010744-GC-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001145279.4(OPRM1):​c.-271delC variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as drug response (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: OPRM1 NM_001145279.4 5_prime_UTR
• Clinical Significance: drug response no assertion criteria provided O:1
• Conservation: PhyloP100: 0.303

Genes affected

OPRM1 (HGNC:8156): (opioid receptor mu 1) This gene encodes one of at least three opioid receptors in humans; the mu opioid receptor (MOR). The MOR is the principal target of endogenous opioid peptides and opioid analgesic agents such as beta-endorphin and enkephalins. The MOR also has an important role in dependence to other drugs of abuse, such as nicotine, cocaine, and alcohol via its modulation of the dopamine system. The NM_001008503.2:c.118A>G allele has been associated with opioid and alcohol addiction and variations in pain sensitivity but evidence for it having a causal role is conflicting. Multiple transcript variants encoding different isoforms have been found for this gene. Though the canonical MOR belongs to the superfamily of 7-transmembrane-spanning G-protein-coupled receptors some isoforms of this gene have only 6 transmembrane domains. [provided by RefSeq, Oct 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
OPRM1	NM_001145279.4	c.-271delC		5_prime_UTR_variant	1/6		NP_001138751.1
OPRM1	NM_001145280.4	c.-281delC		5_prime_UTR_variant	1/4		NP_001138752.1
OPRM1	NM_001145281.3	c.47+189delC		intron_variant			NP_001138753.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
OPRM1	ENST00000434900	c.-271delC		5_prime_UTR_variant	1/6	1		ENSP00000394624.2
OPRM1	ENST00000520708.5	c.-281delC		5_prime_UTR_variant	1/4	1		ENSP00000430876.1
OPRM1	ENST00000520282	c.-261delC		5_prime_UTR_variant	1/3	1		ENSP00000430247.1
OPRM1	ENST00000518759.5	c.47+189delC		intron_variant		1		ENSP00000430260.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: drug response

Submissions summary: Other:1

Revision: no assertion criteria provided

Submissions by phenotype

Tramadol response Other:1

drug response, no assertion criteria provided

research

Bruce Budowle Laboratory, University of North Texas Health Science Center

Apr 28, 2018

- T:M1 = postmortem ratio or tramadol to O-desmethyltramadol; t-MP = model-based clustered metabolizer phenotype inferred from T:M1

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs1583105465; hg19: chr6-154331879;