chr6-154212790-C-T

Position:

• chr6-154212790-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_001130700.2(IPCEF1):​c.517G>A​(p.Ala173Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000409 in 1,612,366 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.000033 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000042 (1 hom.)
• Consequence: IPCEF1 NM_001130700.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.147

Genes affected

IPCEF1 (HGNC:21204): (interaction protein for cytohesin exchange factors 1) Predicted to enable peroxidase activity. Predicted to be involved in response to oxidative stress. Predicted to be located in cytosol and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

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 Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.0359284).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
IPCEF1	NM_001130700.2	c.517G>A	p.Ala173Thr	missense_variant	9/12	ENST00000367220.9	NP_001124172.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
IPCEF1	ENST00000367220.9	c.517G>A	p.Ala173Thr	missense_variant	9/12	2	NM_001130700.2	ENSP00000356189	A2

Frequencies

GnomAD3 genomes AF: 0.0000329 AC: 5 AN: 152190 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000654

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.000479

GnomAD3 exomes AF: 0.0000518 AC: 13 AN: 251180 Hom.: 0 AF XY: 0.0000516 AC XY: 7 AN XY: 135758

Gnomad AFR exome AF: 0.0000615

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.0000654

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000528

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000418 AC: 61 AN: 1460058 Hom.: 1 Cov.: 28 AF XY: 0.0000482 AC XY: 35 AN XY: 726448

Gnomad4 AFR exome AF: 0.0000299

Gnomad4 AMR exome AF: 0.000112

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000580

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.0000198

Gnomad4 OTH exome AF: 0.0000994

GnomAD4 genome AF: 0.0000328 AC: 5 AN: 152308 Hom.: 0 Cov.: 32 AF XY: 0.0000403 AC XY: 3 AN XY: 74476

Gnomad4 AFR AF: 0.0000241

Gnomad4 AMR AF: 0.0000654

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000207

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.000474

Alfa AF: 0.0000434 Hom.: 0

Bravo AF: 0.0000378

ExAC AF: 0.0000659 AC: 8

EpiCase AF: 0.00

EpiControl AF: 0.000119

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

Apr 04, 2024

The c.517G>A (p.A173T) alteration is located in exon 10 (coding exon 7) of the IPCEF1 gene. This alteration results from a G to A substitution at nucleotide position 517, causing the alanine (A) at amino acid position 173 to be replaced by a threonine (T). 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	0.065
BayesDel_addAF	Benign	-0.46	T
BayesDel_noAF	Benign	-0.67
CADD	Benign	5.1
DANN	Benign	0.80
DEOGEN2	Benign	0.0025	T;.;.;.;T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.017	N
LIST_S2	Benign	0.57	T;.;T;T;T
M_CAP	Benign	0.011	T
MetaRNN	Benign	0.036	T;T;T;T;T
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	0.14	N;.;.;.;.
MutationTaster	Benign	1.0	N;N;N;N;N
PrimateAI	Benign	0.28	T
PROVEAN	Benign	-0.33	N;N;N;N;N
REVEL	Benign	0.0050
Sift	Benign	0.45	T;T;T;T;T
Sift4G	Benign	1.0	T;T;T;T;.
Polyphen		0.21	B;P;P;.;.
Vest4		0.088
MutPred		0.22		Gain of relative solvent accessibility (P = 0.0023);.;.;.;.;
MVP		0.030
MPC		0.26
ClinPred		0.14	T
GERP RS		1.7
Varity_R		0.023
gMVP		0.16

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

LitVar

Other links and lift over

dbSNP: rs761913720; hg19: chr6-154533924; COSMIC: COSV54552096; COSMIC: COSV54552096;