5-55220448-C-T

Variant names:

• chr5-55220448-C-T
• rs1561114448
• NM_001190787.3:c.1076G>A

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001190787.3(MCIDAS):​c.1076G>A​(p.Arg359His) variant causes a missense change. The variant allele was found at a frequency of 0.000000723 in 1,383,790 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R359L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: MCIDAS NM_001190787.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.64
• Publications: 0 publications found

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]

MCIDAS Gene-Disease associations (from GenCC):

• ciliary dyskinesia, primary, 42

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae)
• primary ciliary dyskinesia

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001190787.3. 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
	MCIDAS	NM_001190787.3	MANE Select	c.1076G>A	p.Arg359His	missense	Exon 7 of 7	NP_001177716.1	D6RGH6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MCIDAS	ENST00000513312.3	TSL:1 MANE Select	c.1076G>A	p.Arg359His	missense	Exon 7 of 7	ENSP00000426359.1	D6RGH6
	MCIDAS	ENST00000513468.5	TSL:5	n.*540G>A		non_coding_transcript_exon	Exon 7 of 7	ENSP00000422165.1	I6L8E2
	MCIDAS	ENST00000513468.5	TSL:5	n.*540G>A		3_prime_UTR	Exon 7 of 7	ENSP00000422165.1	I6L8E2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 7.23e-7 AC: 1 AN: 1383790 Hom.: 0 Cov.: 30 AF XY: 0.00000146 AC XY: 1 AN XY: 682840

African (AFR) AF: 0.00 AC: 0 AN: 31592

American (AMR) AF: 0.00 AC: 0 AN: 35700

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25182

East Asian (EAS) AF: 0.00 AC: 0 AN: 35734

South Asian (SAS) AF: 0.0000126 AC: 1 AN: 79230

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33926

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5642

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1078886

Other (OTH) AF: 0.00 AC: 0 AN: 57898

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.29
BayesDel_addAF	Pathogenic	0.24	D
BayesDel_noAF	Uncertain	0.10
CADD	Pathogenic	31
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.15	T
Eigen	Uncertain	0.62
Eigen_PC	Uncertain	0.59
FATHMM_MKL	Uncertain	0.79	D
LIST_S2	Uncertain	0.87	D
M_CAP	Pathogenic	0.33	D
MetaRNN	Uncertain	0.67	D
MetaSVM	Uncertain	-0.25	T
MutationAssessor	Uncertain	2.1	M
PhyloP100		3.6
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	-1.8	N
REVEL	Benign	0.23
Sift	Uncertain	0.0020	D
Sift4G	Pathogenic	0.0	D
Polyphen		1.0	D
Vest4		0.73
MutPred		0.49		Loss of MoRF binding (P = 0.0329)
MVP		0.13
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.22
gMVP		0.72
Mutation Taster		=68/32	polymorphism

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

Other links and lift over

dbSNP: rs1561114448; hg19: chr5-54516276; COSMIC: COSV101563746; COSMIC: COSV101563746;