NM_001395413.1:c.33C>T

Variant names:

• chr7-75954034-C-T
• rs781833194
• NM_001395413.1:c.33C>T

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_Strong BP6_Moderate BP7

The NM_001395413.1(POR):​c.33C>T​(p.Thr11Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000144 in 1,456,622 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000014 (0 hom.)
• Consequence: POR NM_001395413.1 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -3.49
• Publications: 0 publications found

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]

POR Gene-Disease associations (from GenCC):

• Antley-Bixler syndrome with genital anomalies and disordered steroidogenesis

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen, Ambry Genetics
• congenital adrenal hyperplasia due to cytochrome P450 oxidoreductase deficiency

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• Antley-Bixler syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -7 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.84).
• BP6: Variant 7-75954034-C-T is Benign according to our data. Variant chr7-75954034-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 2163444.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-3.49 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001395413.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POR	NM_001395413.1	MANE Select	c.33C>T	p.Thr11Thr	synonymous	Exon 2 of 16	NP_001382342.1	P16435
	POR	NM_001382655.3		c.33C>T	p.Thr11Thr	synonymous	Exon 2 of 17	NP_001369584.2
	POR	NM_001367562.3		c.33C>T	p.Thr11Thr	synonymous	Exon 3 of 17	NP_001354491.2	P16435

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	POR	ENST00000461988.6	TSL:1 MANE Select	c.33C>T	p.Thr11Thr	synonymous	Exon 2 of 16	ENSP00000419970.2	P16435
	POR	ENST00000910548.1		c.33C>T	p.Thr11Thr	synonymous	Exon 2 of 16	ENSP00000580607.1
	POR	ENST00000910554.1		c.33C>T	p.Thr11Thr	synonymous	Exon 2 of 16	ENSP00000580613.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000833 AC: 2 AN: 240238 AF XY: 0.0000154

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: 0.00000920

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000144 AC: 21 AN: 1456622 Hom.: 0 Cov.: 31 AF XY: 0.0000138 AC XY: 10 AN XY: 724116

African (AFR) AF: 0.00 AC: 0 AN: 33402

American (AMR) AF: 0.00 AC: 0 AN: 43904

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25964

East Asian (EAS) AF: 0.00 AC: 0 AN: 39564

South Asian (SAS) AF: 0.0000352 AC: 3 AN: 85228

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53096

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5708

European-Non Finnish (NFE) AF: 0.0000162 AC: 18 AN: 1109530

Other (OTH) AF: 0.00 AC: 0 AN: 60226

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Congenital adrenal hyperplasia due to cytochrome P450 oxidoreductase deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.84
CADD	Benign	1.0
DANN	Benign	0.70
PhyloP100		-3.5
PromoterAI		-0.0068	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

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: rs781833194; hg19: chr7-75583352;