7-75954006-G-C

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001395413.1(POR):ā€‹c.5G>Cā€‹(p.Gly2Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000626 in 1,597,992 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/18 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (ā˜…).

Frequency

Genomes: š‘“ 0.000033 ( 0 hom., cov: 32)
Exomes š‘“: 0.0000035 ( 0 hom. )

Consequence

POR
NM_001395413.1 missense

Scores

16

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.234
Variant links:
Genes affected
POR (HGNC:9208): (cytochrome p450 oxidoreductase) This gene encodes an endoplasmic reticulum membrane oxidoreductase that is essential for multiple metabolic processes, including reactions catalyzed by cytochrome P450 proteins for metabolism of steroid hormones, drugs and xenobiotics. The encoded protein has a flavin adenine dinucleotide (FAD)-binding domain and a flavodoxin-like domain which bind two cofactors, FAD and FMN, that allow it to donate electrons directly from NADPH to all microsomal P450 enzymes. Mutations in this gene cause a complex set of disorders, including apparent combined P450C17 and P450C21 deficiency, amenorrhea and disordered steroidogenesis, congenital adrenal hyperplasia and Antley-Bixler syndrome, that resemble those caused by defects in steroid metabolizing enzymes such as aromatase, 21-hydroxylase, and 17 alpha-hydroxylase. [provided by RefSeq, Aug 2020]

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.05369374).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
PORNM_001395413.1 linkuse as main transcriptc.5G>C p.Gly2Ala missense_variant 2/16 ENST00000461988.6 NP_001382342.1

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
PORENST00000461988.6 linkuse as main transcriptc.5G>C p.Gly2Ala missense_variant 2/161 NM_001395413.1 ENSP00000419970 P4

Frequencies

GnomAD3 genomes
AF:
0.0000328
AC:
5
AN:
152238
Hom.:
0
Cov.:
32
show subpopulations
Gnomad AFR
AF:
0.000121
Gnomad AMI
AF:
0.00
Gnomad AMR
AF:
0.00
Gnomad ASJ
AF:
0.00
Gnomad EAS
AF:
0.00
Gnomad SAS
AF:
0.00
Gnomad FIN
AF:
0.00
Gnomad MID
AF:
0.00
Gnomad NFE
AF:
0.00
Gnomad OTH
AF:
0.00
GnomAD3 exomes
AF:
0.0000133
AC:
3
AN:
224998
Hom.:
0
AF XY:
0.0000164
AC XY:
2
AN XY:
121624
show subpopulations
Gnomad AFR exome
AF:
0.000220
Gnomad AMR exome
AF:
0.00
Gnomad ASJ exome
AF:
0.00
Gnomad EAS exome
AF:
0.00
Gnomad SAS exome
AF:
0.00
Gnomad FIN exome
AF:
0.00
Gnomad NFE exome
AF:
0.00
Gnomad OTH exome
AF:
0.00
GnomAD4 exome
AF:
0.00000346
AC:
5
AN:
1445754
Hom.:
0
Cov.:
31
AF XY:
0.00000418
AC XY:
3
AN XY:
717706
show subpopulations
Gnomad4 AFR exome
AF:
0.000151
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.00
Gnomad4 OTH exome
AF:
0.00
GnomAD4 genome
AF:
0.0000328
AC:
5
AN:
152238
Hom.:
0
Cov.:
32
AF XY:
0.0000403
AC XY:
3
AN XY:
74382
show subpopulations
Gnomad4 AFR
AF:
0.000121
Gnomad4 AMR
AF:
0.00
Gnomad4 ASJ
AF:
0.00
Gnomad4 EAS
AF:
0.00
Gnomad4 SAS
AF:
0.00
Gnomad4 FIN
AF:
0.00
Gnomad4 NFE
AF:
0.00
Gnomad4 OTH
AF:
0.00
Bravo
AF:
0.0000340
ExAC
AF:
0.0000165
AC:
2

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link

Submissions by phenotype

Congenital adrenal hyperplasia due to cytochrome P450 oxidoreductase deficiency Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpAug 30, 2023In 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. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Not Available"; PolyPhen-2: "Benign"; Align-GVGD: "Not Available". The alanine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. ClinVar contains an entry for this variant (Variation ID: 2038685). This variant has not been reported in the literature in individuals affected with POR-related conditions. This variant is present in population databases (rs782818618, gnomAD 0.02%). This sequence change replaces glycine, which is neutral and non-polar, with alanine, which is neutral and non-polar, at codon 5 of the POR protein (p.Gly5Ala). -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Benign
-0.39
T
BayesDel_noAF
Benign
-0.51
CADD
Benign
9.3
DANN
Benign
0.79
Eigen
Benign
-0.86
Eigen_PC
Benign
-0.80
FATHMM_MKL
Benign
0.66
D
LIST_S2
Benign
0.69
.;.;.;T;.;.;.;.;.;.
M_CAP
Benign
0.0082
T
MetaRNN
Benign
0.054
T;T;T;T;T;T;T;T;T;T
MetaSVM
Benign
-0.96
T
MutationTaster
Benign
0.92
D;D;D
PrimateAI
Benign
0.41
T
PROVEAN
Benign
-0.71
N;N;N;D;N;N;N;N;D;D
REVEL
Benign
0.13
Sift
Benign
0.22
T;T;T;T;T;T;T;T;T;T
Sift4G
Benign
0.55
T;T;T;D;T;T;T;T;T;T
Vest4
0.23, 0.22
MVP
0.17
MPC
0.12
ClinPred
0.011
T
GERP RS
-1.1
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.1
gMVP
0.40

Splicing

Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
0.020
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

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs782818618; hg19: chr7-75583324; API