NM_001367916.1:c.978T>C

Variant names:

• chrX-77830819-A-G
• NM_001367916.1:c.978T>C

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_001367916.1(MAGT1):​c.978T>C​(p.His326His) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0 (0 hom. 0 hem.)
  • Failed GnomAD Quality Control
• Consequence: MAGT1 NM_001367916.1 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 1.09
• Publications: 0 publications found

Genes affected

MAGT1 (HGNC:28880): (magnesium transporter 1) This gene encodes a ubiquitously expressed magnesium cation transporter protein that localizes to the cell membrane. This protein also associates with N-oligosaccharyl transferase and therefore may have a role in N-glycosylation. Mutations in this gene cause a form of X-linked intellectual disability (XLID). This gene may have multiple in-frame translation initiation sites, one of which would encode a shorter protein with an N-terminus containing a signal peptide at amino acids 1-29. [provided by RefSeq, Jul 2017]

MAGT1 Gene-Disease associations (from GenCC):

• X-linked immunodeficiency with magnesium defect, Epstein-Barr virus infection and neoplasia

  Inheritance: XL, Unknown Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet
• intellectual disability, X-linked 95

  Inheritance: XL Classification: LIMITED Submitted by: G2P
• X-linked intellectual disability

  Inheritance: XL Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.49).
• BP6: Variant X-77830819-A-G is Benign according to our data. Variant chrX-77830819-A-G is described in ClinVar as Likely_benign. ClinVar VariationId is 3655391.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=1.09 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001367916.1. 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
	MAGT1	NM_001367916.1	MANE Select	c.978T>C	p.His326His	synonymous	Exon 9 of 10	NP_001354845.1	Q9H0U3-1
	MAGT1	NM_032121.5		c.1074T>C	p.His358His	synonymous	Exon 9 of 10	NP_115497.4	Q9H0U3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MAGT1	ENST00000618282.5	TSL:1 MANE Select	c.978T>C	p.His326His	synonymous	Exon 9 of 10	ENSP00000480732.1	Q9H0U3-1
	MAGT1	ENST00000358075.11	TSL:1	c.978T>C	p.His326His	synonymous	Exon 9 of 10	ENSP00000354649.6	Q9H0U3-1
	MAGT1	ENST00000688650.1		c.888T>C	p.His296His	synonymous	Exon 8 of 9	ENSP00000509785.1	A0A8I5KYH1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1029791 Hom.: 0 Cov.: 19 AF XY: 0.00 AC XY: 0 AN XY: 315455

African (AFR) AF: 0.00 AC: 0 AN: 24673

American (AMR) AF: 0.00 AC: 0 AN: 33265

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 18016

East Asian (EAS) AF: 0.00 AC: 0 AN: 28214

South Asian (SAS) AF: 0.00 AC: 0 AN: 47955

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 38465

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 3865

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 792379

Other (OTH) AF: 0.00 AC: 0 AN: 42959

GnomAD4 genome Cov.: 23

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	X-linked immunodeficiency with magnesium defect, Epstein-Barr virus infection and neoplasia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.49
CADD	Benign	7.1
DANN	Benign	0.66
PhyloP100		1.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

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

hg19: chrX-77086316;