5-7892197-G-A

Position:

• chr5-7892197-G-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_002454.3(MTRR):​c.1371-530G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.842 in 152,182 control chromosomes in the GnomAD database, including 54,143 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.84 (54143 hom., cov: 32)
• Consequence: MTRR NM_002454.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.445

Genes affected

MTRR (HGNC:7473): (5-methyltetrahydrofolate-homocysteine methyltransferase reductase) This gene encodes a member of the ferredoxin-NADP(+) reductase (FNR) family of electron transferases. This protein functions in the synthesis of methionine by regenerating methionine synthase to a functional state. Because methionine synthesis requires methyl-group transfer by a folate donor, activity of the encoded enzyme is important for folate metabolism and cellular methylation. Mutations in this gene can cause homocystinuria-megaloblastic anemia, cbl E type. Alternative splicing of this gene results in multiple transcript variants. [provided by RefSeq, Dec 2015]

MTRR (HGNC:):

ACMG classification

Verdict is Benign. Variant got -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.91).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.889 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MTRR	NM_002454.3	c.1371-530G>A		intron_variant		ENST00000440940.7	NP_002445.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MTRR	ENST00000440940.7	c.1371-530G>A		intron_variant		1	NM_002454.3	ENSP00000402510.2

Frequencies

GnomAD3 genomes AF: 0.841 AC: 127960 AN: 152064 Hom.: 54089 Cov.: 32

Gnomad AFR AF: 0.897

Gnomad AMI AF: 0.842

Gnomad AMR AF: 0.849

Gnomad ASJ AF: 0.787

Gnomad EAS AF: 0.671

Gnomad SAS AF: 0.803

Gnomad FIN AF: 0.818

Gnomad MID AF: 0.823

Gnomad NFE AF: 0.829

Gnomad OTH AF: 0.826

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.842 AC: 128079 AN: 152182 Hom.: 54143 Cov.: 32 AF XY: 0.840 AC XY: 62476 AN XY: 74398

Gnomad4 AFR AF: 0.897

Gnomad4 AMR AF: 0.849

Gnomad4 ASJ AF: 0.787

Gnomad4 EAS AF: 0.672

Gnomad4 SAS AF: 0.803

Gnomad4 FIN AF: 0.818

Gnomad4 NFE AF: 0.829

Gnomad4 OTH AF: 0.825

Alfa AF: 0.828 Hom.: 23858

Bravo AF: 0.843

Asia WGS AF: 0.742 AC: 2583 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.91
CADD	Benign	0.17
DANN	Benign	0.83

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: rs162048; hg19: chr5-7892310;