7-99768360-A-T

Variant names:

• chr7-99768360-A-T
• rs55785340
• NM_017460.6:c.664T>A

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_017460.6(CYP3A4):​c.664T>A​(p.Ser222Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000124 in 1,613,602 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: CYP3A4 NM_017460.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.0290
• Publications: 73 publications found

Genes affected

CYP3A4 (HGNC:2637): (cytochrome P450 family 3 subfamily A member 4) This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases that catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This protein localizes to the endoplasmic reticulum and its expression is induced by glucocorticoids and some pharmacological agents. This enzyme is involved in the metabolism of approximately half the drugs in use today, including acetaminophen, codeine, cyclosporin A, diazepam, erythromycin, and chloroquine. The enzyme also metabolizes some steroids and carcinogens. This gene is part of a cluster of cytochrome P450 genes on chromosome 7q21.1. Previously another CYP3A gene, CYP3A3, was thought to exist; however, it is now thought that this sequence represents a transcript variant of CYP3A4. Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Aug 2020]

CYP3A4 Gene-Disease associations (from GenCC):

• vitamin D-dependent rickets, type 3

  Inheritance: Unknown, AD Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.11285362).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017460.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYP3A4	NM_017460.6	MANE Select	c.664T>A	p.Ser222Thr	missense	Exon 7 of 13	NP_059488.2
	CYP3A4	NM_001202855.3		c.664T>A	p.Ser222Thr	missense	Exon 7 of 13	NP_001189784.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CYP3A4	ENST00000651514.1	MANE Select	c.664T>A	p.Ser222Thr	missense	Exon 7 of 13	ENSP00000498939.1
	CYP3A4	ENST00000336411.7	TSL:1	c.664T>A	p.Ser222Thr	missense	Exon 7 of 14	ENSP00000337915.3
	CYP3A4	ENST00000652018.1		c.517T>A	p.Ser173Thr	missense	Exon 5 of 11	ENSP00000498733.1

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152198 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000241

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

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461404 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 727028

African (AFR) AF: 0.0000299 AC: 1 AN: 33460

American (AMR) AF: 0.00 AC: 0 AN: 44708

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39662

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53410

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1111648

Other (OTH) AF: 0.00 AC: 0 AN: 60372

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152198 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74366

African (AFR) AF: 0.0000241 AC: 1 AN: 41444

American (AMR) AF: 0.00 AC: 0 AN: 15270

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5194

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10630

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68036

Other (OTH) AF: 0.00 AC: 0 AN: 2094

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.076
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.52
CADD	Benign	8.4
DANN	Benign	0.57
DEOGEN2	Benign	0.017	T
Eigen	Benign	-0.71
Eigen_PC	Benign	-0.74
FATHMM_MKL	Benign	0.079	N
LIST_S2	Benign	0.68	T
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.11	T
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	1.8	L
PhyloP100		0.029
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-1.1	N
REVEL	Benign	0.075
Sift	Benign	0.35	T
Sift4G	Benign	0.52	T
Polyphen		0.0010	B
Vest4		0.15
MutPred		0.49		Gain of helix (P = 0.1736)
MVP		0.63
MPC		0.076
ClinPred		0.12	T
GERP RS		3.1
Varity_R		0.31
Mutation Taster		=83/17	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: rs55785340; hg19: chr7-99365983;