rs1135402739

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM2PP2PP5BP4

The NM_015295.3(SMCHD1):​c.415A>C​(p.Asn139His) variant causes a missense change. 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 Pathogenic (no stars).

Frequency

Genomes: not found (cov: 32)

Consequence

SMCHD1
NM_015295.3 missense

Scores

2
6
11

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 7.07
Variant links:
Genes affected
SMCHD1 (HGNC:29090): (structural maintenance of chromosomes flexible hinge domain containing 1) This gene encodes a protein which contains a hinge region domain found in members of the SMC (structural maintenance of chromosomes) protein family. [provided by RefSeq, Dec 2011]

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2
Very rare variant in population databases, with high coverage;
PP2
Missense variant in gene, where missense usually causes diseases (based on misZ statistic), SMCHD1. . Gene score misZ: 3.6318 (greater than the threshold 3.09). Trascript score misZ: 3.965 (greater than threshold 3.09). The gene has 23 curated pathogenic missense variants (we use a threshold of 10). The gene has 10 curated benign missense variants. GenCC has associacion of the gene with facioscapulohumeral muscular dystrophy, arhinia, choanal atresia, and microphthalmia, hyposmia-nasal and ocular hypoplasia-hypogonadotropic hypogonadism syndrome.
PP5
Variant 18-2667022-A-C is Pathogenic according to our data. Variant chr18-2667022-A-C is described in ClinVar as [Pathogenic]. Clinvar id is 431463.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr18-2667022-A-C is described in Lovd as [Pathogenic].
BP4
Computational evidence support a benign effect (MetaRNN=0.3314355). . Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
SMCHD1NM_015295.3 linkc.415A>C p.Asn139His missense_variant 3/48 ENST00000320876.11 NP_056110.2

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
SMCHD1ENST00000320876.11 linkc.415A>C p.Asn139His missense_variant 3/485 NM_015295.3 ENSP00000326603.7 A6NHR9-1
SMCHD1ENST00000688342.1 linkc.415A>C p.Asn139His missense_variant 3/47 ENSP00000508422.1 A0A8I5KRS9
SMCHD1ENST00000684915.1 linkn.572A>C non_coding_transcript_exon_variant 3/14

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
Cov.:
30
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Pathogenic
Submissions summary: Pathogenic:1
Revision: no assertion criteria provided
LINK: link

Submissions by phenotype

Arrhinia with choanal atresia and microphthalmia syndrome Pathogenic:1
Pathogenic, no assertion criteria providedresearchMGH Harvard Center for Reproductive Medicine, Massachusetts General Hospital-- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.26
BayesDel_addAF
Benign
-0.083
T
BayesDel_noAF
Benign
-0.36
CADD
Uncertain
26
DANN
Uncertain
0.99
DEOGEN2
Benign
0.11
T
Eigen
Uncertain
0.63
Eigen_PC
Uncertain
0.66
FATHMM_MKL
Pathogenic
0.98
D
LIST_S2
Uncertain
0.89
D
M_CAP
Benign
0.058
D
MetaRNN
Benign
0.33
T
MetaSVM
Benign
-0.99
T
MutationAssessor
Benign
0.97
L
PrimateAI
Uncertain
0.74
T
PROVEAN
Benign
-1.3
N
REVEL
Benign
0.16
Sift
Uncertain
0.0040
D
Sift4G
Pathogenic
0.0
D
Polyphen
1.0
D
Vest4
0.47
MutPred
0.25
Gain of disorder (P = 0.0734);
MVP
0.24
MPC
1.7
ClinPred
0.87
D
GERP RS
5.6
RBP_binding_hub_radar
0.0
RBP_regulation_power_radar
1.7
Varity_R
0.62
gMVP
0.69

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

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs1135402739; hg19: chr18-2667021; COSMIC: COSV55253802; API