8-39923569-T-G

Variant names:

• chr8-39923569-T-G
• rs376530940
• NM_002164.6:c.638T>G

Variant summary

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

The NM_002164.6(IDO1):​c.638T>G​(p.Val213Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000373 in 1,607,802 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V213A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: IDO1 NM_002164.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.223
• Publications: 0 publications found

Genes affected

IDO1 (HGNC:6059): (indoleamine 2,3-dioxygenase 1) This gene encodes indoleamine 2,3-dioxygenase (IDO) - a heme enzyme that catalyzes the first and rate-limiting step in tryptophan catabolism to N-formyl-kynurenine. This enzyme acts on multiple tryptophan substrates including D-tryptophan, L-tryptophan, 5-hydroxy-tryptophan, tryptamine, and serotonin. This enzyme is thought to play a role in a variety of pathophysiological processes such as antimicrobial and antitumor defense, neuropathology, immunoregulation, and antioxidant activity. Through its expression in dendritic cells, monocytes, and macrophages this enzyme modulates T-cell behavior by its peri-cellular catabolization of the essential amino acid tryptophan.[provided by RefSeq, Feb 2011]

ENSG00000253939 (HGNC:):

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=0.2540497).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002164.6. 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
	IDO1	NM_002164.6	MANE Select	c.638T>G	p.Val213Gly	missense	Exon 7 of 10	NP_002155.1	P14902

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	IDO1	ENST00000518237.6	TSL:1 MANE Select	c.638T>G	p.Val213Gly	missense	Exon 7 of 10	ENSP00000430950.1	P14902
	IDO1	ENST00000522495.5	TSL:5	c.638T>G	p.Val213Gly	missense	Exon 9 of 12	ENSP00000430505.1	P14902
	IDO1	ENST00000253513.11	TSL:5	n.*121T>G		non_coding_transcript_exon	Exon 6 of 9	ENSP00000253513.7	J3KN03

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152218 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

GnomAD2 exomes AF: 0.00000804 AC: 2 AN: 248690 AF XY: 0.00000741

Gnomad AFR exome AF: 0.0000648

Gnomad AMR exome AF: 0.0000291

Gnomad ASJ exome AF: 0.00

Gnomad EAS 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: 0.00000344 AC: 5 AN: 1455466 Hom.: 0 Cov.: 29 AF XY: 0.00000276 AC XY: 2 AN XY: 724566

African (AFR) AF: 0.0000900 AC: 3 AN: 33338

American (AMR) AF: 0.0000224 AC: 1 AN: 44670

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26080

East Asian (EAS) AF: 0.00 AC: 0 AN: 39636

South Asian (SAS) AF: 0.00 AC: 0 AN: 86052

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53380

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1106348

Other (OTH) AF: 0.0000166 AC: 1 AN: 60200

GnomAD4 genome AF: 0.00000656 AC: 1 AN: 152336 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74496

African (AFR) AF: 0.0000240 AC: 1 AN: 41582

American (AMR) AF: 0.00 AC: 0 AN: 15304

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

East Asian (EAS) AF: 0.00 AC: 0 AN: 5178

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

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 292

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 68030

Other (OTH) AF: 0.00 AC: 0 AN: 2114

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.0000302

ExAC AF: 0.0000248 AC: 3

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	14
DANN	Benign	0.96
DEOGEN2	Benign	0.35	T
Eigen	Benign	-0.74
Eigen_PC	Benign	-0.97
FATHMM_MKL	Benign	0.032	N
LIST_S2	Benign	0.27	T
M_CAP	Benign	0.015	T
MetaRNN	Benign	0.25	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.7	M
PhyloP100		-0.22
PrimateAI	Benign	0.40	T
PROVEAN	Benign	-2.3	N
REVEL	Benign	0.17
Sift	Benign	0.034	D
Sift4G	Uncertain	0.0030	D
Polyphen		0.94	P
Vest4		0.34
MutPred		0.60		Loss of stability (P = 0.0345)
MVP		0.24
MPC		0.18
ClinPred		0.18	T
GERP RS		-2.4
Varity_R		0.24
gMVP		0.44
Mutation Taster		=95/5	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.010		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: rs376530940; hg19: chr8-39781088;