5-55220382-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP3_Moderate PP5_Moderate

The NM_001190787.3(MCIDAS):c.1142G>A(p.Arg381His) 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 Likely pathogenic (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MCIDAS NM_001190787.3 missense
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:2
• Conservation: PhyloP100: 6.25

Genes affected

MCIDAS (HGNC:40050): (multiciliate differentiation and DNA synthesis associated cell cycle protein) This gene encodes a member of the geminin family of proteins. The encoded nuclear protein is required for the generation of multiciliated cells in respiratory epithelium. Mutations in this gene cause a rare mucociliary clearance disorder associated with recurring respiratory infections in human patients, known as reduced generation of multiple motile cilia (RGMC). [provided by RefSeq, Sep 2016]

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, 0.86
• PP5: Variant 5-55220382-C-T is Pathogenic according to our data. Variant chr5-55220382-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 209009.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MCIDAS	NM_001190787.3	c.1142G>A	p.Arg381His	missense_variant	7/7	ENST00000513312.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MCIDAS	ENST00000513312.3	c.1142G>A	p.Arg381His	missense_variant	7/7	1	NM_001190787.3	P1
MCIDAS	ENST00000513468.5	c.*606G>A		3_prime_UTR_variant, NMD_transcript_variant	7/7	5

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1382570 Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0 AN XY: 682002

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: criteria provided, single submitter

Submissions by phenotype

Primary ciliary dyskinesia Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Invitae

Jun 27, 2022

In summary, the currently available evidence indicates that the variant is pathogenic, but additional data are needed to prove that conclusively. Therefore, this variant has been classified as Likely Pathogenic. Experimental studies are conflicting or provide insufficient evidence to determine the effect of this variant on MCIDAS function (PMID: 25048963). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 209009). This missense change has been observed in individual(s) with primary ciliary dyskinesia (PMID: 8813877, 25048963; Invitae). This variant is not present in population databases (gnomAD no frequency). This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 381 of the MCIDAS protein (p.Arg381His). -

Ciliary dyskinesia, primary, 42 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Dec 13, 2019

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.47
BayesDel_addAF	Uncertain	0.16	D
BayesDel_noAF	Uncertain	-0.010
Cadd	Pathogenic	30
Dann	Pathogenic	1.0
DEOGEN2	Benign	0.12	T
Eigen	Pathogenic	0.68
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Uncertain	0.92	D
LIST_S2	Uncertain	0.87	D
M_CAP	Pathogenic	0.54	D
MetaRNN	Pathogenic	0.86	D
MetaSVM	Benign	-0.33	T
MutationAssessor	Uncertain	2.1	M
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-1.6	N
REVEL	Benign	0.22
Sift	Uncertain	0.0020	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.91
MutPred		0.45		Loss of MoRF binding (P = 5e-04);
MVP		0.17
ClinPred		0.99	D
GERP RS		4.9
Varity_R		0.23
gMVP		0.59

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

Other links and lift over

dbSNP: rs797045152; hg19: chr5-54516210;