chr17-7592268-G-T

Variant names:

• chr17-7592268-G-T
• rs371887660
• NM_004860.4:c.1912C>A

Variant summary

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

The NM_004860.4(FXR2):​c.1912C>A​(p.Leu638Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000686 in 1,458,704 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 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. L638V) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: FXR2 NM_004860.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.28
• Publications: 0 publications found

Genes affected

FXR2 (HGNC:4024): (FMR1 autosomal homolog 2) The protein encoded by this gene is a RNA binding protein containing two KH domains and one RCG box, which is similar to FMRP and FXR1. It associates with polyribosomes, predominantly with 60S large ribosomal subunits. This encoded protein may self-associate or interact with FMRP and FXR1. It may have a role in the development of fragile X cognitive disability syndrome. [provided by RefSeq, Jul 2008]

MPDU1 (HGNC:7207): (mannose-P-dolichol utilization defect 1) This gene encodes an endoplasmic reticulum membrane protein that is required for utilization of the mannose donor mannose-P-dolichol in the synthesis of lipid-linked oligosaccharides and glycosylphosphatidylinositols. Mutations in this gene result in congenital disorder of glycosylation type If. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Dec 2008]

MPDU1 Gene-Disease associations (from GenCC):

• MPDU1-congenital disorder of glycosylation

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), G2P

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=0.1474672).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_004860.4. 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
	FXR2	NM_004860.4	MANE Select	c.1912C>A	p.Leu638Ile	missense	Exon 16 of 17	NP_004851.2	P51116

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	FXR2	ENST00000250113.12	TSL:1 MANE Select	c.1912C>A	p.Leu638Ile	missense	Exon 16 of 17	ENSP00000250113.7	P51116
	FXR2	ENST00000704984.1		c.2131C>A	p.Leu711Ile	missense	Exon 16 of 17	ENSP00000516064.1	A0A994J7P9
	MPDU1	ENST00000423172.6	TSL:2	c.533-176G>T		intron	N/A	ENSP00000414071.2	O75352-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.86e-7 AC: 1 AN: 1458704 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 725794

African (AFR) AF: 0.00 AC: 0 AN: 33422

American (AMR) AF: 0.00 AC: 0 AN: 44714

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26122

East Asian (EAS) AF: 0.00 AC: 0 AN: 39674

South Asian (SAS) AF: 0.00 AC: 0 AN: 86200

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53398

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5752

European-Non Finnish (NFE) AF: 9.02e-7 AC: 1 AN: 1109138

Other (OTH) AF: 0.00 AC: 0 AN: 60284

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.061
BayesDel_addAF	Benign	-0.20	T
BayesDel_noAF	Benign	-0.53
CADD	Benign	18
DANN	Benign	0.85
DEOGEN2	Benign	0.061	T
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.073
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Benign	0.56	T
M_CAP	Benign	0.0048	T
MetaRNN	Benign	0.15	T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.0	N
PhyloP100		1.3
PrimateAI	Uncertain	0.53	T
PROVEAN	Benign	0.12	N
REVEL	Benign	0.12
Sift	Benign	0.86	T
Sift4G	Benign	0.44	T
Polyphen		0.81	P
Vest4		0.24
MutPred		0.12		Gain of methylation at K642 (P = 0.1054)
MVP		0.43
MPC		0.29
ClinPred		0.23	T
GERP RS		4.0
Varity_R		0.10
gMVP		0.085

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: rs371887660; hg19: chr17-7495586;