X-10449482-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000381.4(MID1):c.1890C>G(p.Asp630Glu) variant causes a missense 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. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. D630N) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 23)
• Consequence: MID1 NM_000381.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.64

Genes affected

MID1 (HGNC:7095): (midline 1) The protein encoded by this gene is a member of the tripartite motif (TRIM) family, also known as the 'RING-B box-coiled coil' (RBCC) subgroup of RING finger proteins. The TRIM motif includes three zinc-binding domains, a RING, a B-box type 1 and a B-box type 2, and a coiled-coil region. This protein forms homodimers which associate with microtubules in the cytoplasm. The protein is likely involved in the formation of multiprotein structures acting as anchor points to microtubules. Mutations in this gene have been associated with the X-linked form of Opitz syndrome, which is characterized by midline abnormalities such as cleft lip, laryngeal cleft, heart defects, hypospadias, and agenesis of the corpus callosum. This gene was also the first example of a gene subject to X inactivation in human while escaping it in mouse. Alternative promoter use, alternative splicing and alternative polyadenylation result in multiple transcript variants that have different tissue specificities. [provided by RefSeq, Dec 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.17697027).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MID1	NM_000381.4	c.1890C>G	p.Asp630Glu	missense_variant	10/10	ENST00000317552.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MID1	ENST00000317552.9	c.1890C>G	p.Asp630Glu	missense_variant	10/10	1	NM_000381.4	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Apr 09, 2023

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt MID1 protein function. This variant has not been reported in the literature in individuals affected with MID1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces aspartic acid, which is acidic and polar, with glutamic acid, which is acidic and polar, at codon 630 of the MID1 protein (p.Asp630Glu). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.089
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.74
Cadd	Benign	12
Dann	Benign	0.97
DEOGEN2	Benign	0.15	T;T;T;T;T;T
FATHMM_MKL	Uncertain	0.91	D
LIST_S2	Benign	0.78	T;.;.;.;.;.
M_CAP	Benign	0.010	T
MetaRNN	Benign	0.18	T;T;T;T;T;T
MetaSVM	Benign	-0.91	T
MutationAssessor	Benign	0.20	N;N;N;N;N;N
MutationTaster	Benign	1.0	D;N;N;N;N;N;N
PrimateAI	Uncertain	0.56	T
PROVEAN	Benign	0.070	N;N;N;N;N;N
REVEL	Benign	0.091
Sift	Benign	0.30	T;T;T;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T;T
Polyphen		0.0	B;B;B;B;B;B
Vest4		0.17
MutPred		0.68		Loss of sheet (P = 0.302);Loss of sheet (P = 0.302);Loss of sheet (P = 0.302);Loss of sheet (P = 0.302);Loss of sheet (P = 0.302);Loss of sheet (P = 0.302);
MVP		0.77
MPC		0.74
ClinPred		0.43	T
GERP RS		0.79
Varity_R		0.17
gMVP		0.24

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: chrX-10417522;