21-41441890-T-C

Position:

• chr21-41441890-T-C

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Strong

The NM_002462.5(MX1):​c.905T>C​(p.Phe302Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MX1 NM_002462.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.87

Genes affected

MX1 (HGNC:7532): (MX dynamin like GTPase 1) This gene encodes a guanosine triphosphate (GTP)-metabolizing protein that participates in the cellular antiviral response. The encoded protein is induced by type I and type II interferons and antagonizes the replication process of several different RNA and DNA viruses. There is a related gene located adjacent to this gene on chromosome 21, and there are multiple pseudogenes located in a cluster on chromosome 4. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]

(HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.988

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MX1	NM_002462.5	c.905T>C	p.Phe302Ser	missense_variant	10/17	ENST00000398598.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MX1	ENST00000398598.8	c.905T>C	p.Phe302Ser	missense_variant	10/17	1	NM_002462.5	P1
	ENST00000411427.3	n.302-20A>G		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 17, 2024

The c.905T>C (p.F302S) alteration is located in exon 12 (coding exon 6) of the MX1 gene. This alteration results from a T to C substitution at nucleotide position 905, causing the phenylalanine (F) at amino acid position 302 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.41
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.87	D;D;D;D;.
Eigen	Pathogenic	0.77
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.86	.;D;.;D;T
M_CAP	Uncertain	0.11	D
MetaRNN	Pathogenic	0.99	D;D;D;D;D
MetaSVM	Pathogenic	0.89	D
MutationAssessor	Pathogenic	3.5	H;H;H;.;H
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.54	T
PROVEAN	Pathogenic	-7.4	D;D;D;D;.
REVEL	Pathogenic	0.94
Sift	Pathogenic	0.0	D;D;D;D;.
Sift4G	Uncertain	0.0020	D;D;D;D;D
Polyphen		1.0	D;D;D;.;.
Vest4		0.96
MutPred		0.89		Gain of disorder (P = 0.0068);Gain of disorder (P = 0.0068);Gain of disorder (P = 0.0068);.;Gain of disorder (P = 0.0068);
MVP		0.97
MPC		0.71
ClinPred		1.0	D
GERP RS		5.1
Varity_R		0.99
gMVP		0.76

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr21-42813817;